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Message boards : Seventeen or Bust : SoB tasks can really be a S.O.B. to accomplish

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Discovered 3 mega primesEliminated 1 conjecture "k"Found 1 prime in the 2019 Tour de PrimesFound 15 primes in the 2020 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,211,391)Cullen LLR Ruby: Earned 2,000,000 credits (2,073,913)ESP LLR Jade: Earned 10,000,000 credits (10,390,853)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,139,193)PPS LLR Sapphire: Earned 20,000,000 credits (22,727,857)PSP LLR Jade: Earned 10,000,000 credits (10,276,533)SoB LLR Ruby: Earned 2,000,000 credits (2,092,713)SR5 LLR Jade: Earned 10,000,000 credits (12,619,323)SGS LLR Turquoise: Earned 5,000,000 credits (9,811,987)TRP LLR Turquoise: Earned 5,000,000 credits (5,511,951)Woodall LLR Ruby: Earned 2,000,000 credits (2,289,700)321 Sieve Jade: Earned 10,000,000 credits (10,170,442)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,018,833)PPS Sieve Double Bronze: Earned 100,000,000 credits (106,944,975)TRP Sieve (suspended) Silver: Earned 100,000 credits (110,630)AP 26/27 Emerald: Earned 50,000,000 credits (67,522,143)GFN Double Silver: Earned 200,000,000 credits (265,776,395)PSA Double Gold: Earned 500,000,000 credits (666,025,256)
Message 119314 - Posted: 7 Jul 2018 | 13:07:11 UTC

I'm finding this to be quite a challenging sub project. It does take a serious amount of CPU time, even while multi threading them with 8 cores it takes me over 2 days for a single task.

I've gotten a few invalid tasks as well as a couple inconclusive tasks.

http://www.primegrid.com/results.php?userid=172547&offset=0&show_names=0&state=3&appid=13

http://www.primegrid.com/results.php?userid=172547&offset=0&show_names=0&state=6&appid=13

At between 1.2 - 1.3 MILLION seconds of CPU time it can be frustrating. But... this makes me want to try harder for this as it's more difficult to achieve.

So SoB can be a S.O.B. at times but I do feel it is worth the effort. So let the crunching continue!

This is a great incentive - "This project has a 50% long job credit bonus and a 10% conjecture credit bonus."

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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,822,730)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Turquoise: Earned 5,000,000 credits (5,009,577)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Jade: Earned 10,000,000 credits (12,841,928)PSP LLR Turquoise: Earned 5,000,000 credits (5,197,957)SoB LLR Sapphire: Earned 20,000,000 credits (34,291,181)SR5 LLR Jade: Earned 10,000,000 credits (10,002,028)SGS LLR Ruby: Earned 2,000,000 credits (2,275,252)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Turquoise: Earned 5,000,000 credits (8,242,519)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,114,159)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Jade: Earned 10,000,000 credits (10,114,260)GFN Emerald: Earned 50,000,000 credits (72,213,603)PSA Jade: Earned 10,000,000 credits (12,404,447)
Message 119321 - Posted: 7 Jul 2018 | 15:22:22 UTC

If it were me, I would fix whatever is wrong with the computer. Might as well abort everything that's in progress since there's a good chance that they're already corrupted and further processing on them would just be wasted.

If the CPU or memory is overclocked, go back to base clocks and see if you stop getting bad results.

Next thing to try is removing the ram and cleaning the contacts. Often, just re-seating the ram can fix the problem, but if you're going to do that you might as well grab a pencil eraser and clean off the contacts while you have the memory out.

It is not normal to get even a single bad result, and you have 3 and probably 5, out of a total of 9.


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Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 3 primes in the 2019 Tour de PrimesFound 2 primes in the 2020 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,055,954)Cullen LLR Turquoise: Earned 5,000,000 credits (5,064,934)ESP LLR Turquoise: Earned 5,000,000 credits (5,005,551)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,002,124)PPS LLR Turquoise: Earned 5,000,000 credits (9,873,020)PSP LLR Turquoise: Earned 5,000,000 credits (5,032,097)SoB LLR Turquoise: Earned 5,000,000 credits (9,976,992)SR5 LLR Turquoise: Earned 5,000,000 credits (9,999,552)SGS LLR Turquoise: Earned 5,000,000 credits (5,942,927)TRP LLR Turquoise: Earned 5,000,000 credits (5,759,074)Woodall LLR Turquoise: Earned 5,000,000 credits (5,053,050)321 Sieve Jade: Earned 10,000,000 credits (10,120,432)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,004,494)PPS Sieve Double Bronze: Earned 100,000,000 credits (100,111,958)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,002,980)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,010,755)AP 26/27 Emerald: Earned 50,000,000 credits (78,413,985)GFN Emerald: Earned 50,000,000 credits (94,075,725)PSA Silver: Earned 100,000 credits (442,843)
Message 119322 - Posted: 7 Jul 2018 | 15:39:30 UTC

I had an FX-8120 a few years back that took over a week per SoB unit, but there was no MT and I ran 7 at a time on it. The newer Intels, like your i5-6400, are significantly faster at SoB than the AMD FX line.
That said, you shouldn't be getting errors no matter how long the task takes. It might be a good idea to do some testing on that FX-8350 system to see what the trouble could be.
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Discovered 3 mega primesEliminated 1 conjecture "k"Found 1 prime in the 2019 Tour de PrimesFound 15 primes in the 2020 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,211,391)Cullen LLR Ruby: Earned 2,000,000 credits (2,073,913)ESP LLR Jade: Earned 10,000,000 credits (10,390,853)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,139,193)PPS LLR Sapphire: Earned 20,000,000 credits (22,727,857)PSP LLR Jade: Earned 10,000,000 credits (10,276,533)SoB LLR Ruby: Earned 2,000,000 credits (2,092,713)SR5 LLR Jade: Earned 10,000,000 credits (12,619,323)SGS LLR Turquoise: Earned 5,000,000 credits (9,811,987)TRP LLR Turquoise: Earned 5,000,000 credits (5,511,951)Woodall LLR Ruby: Earned 2,000,000 credits (2,289,700)321 Sieve Jade: Earned 10,000,000 credits (10,170,442)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,018,833)PPS Sieve Double Bronze: Earned 100,000,000 credits (106,944,975)TRP Sieve (suspended) Silver: Earned 100,000 credits (110,630)AP 26/27 Emerald: Earned 50,000,000 credits (67,522,143)GFN Double Silver: Earned 200,000,000 credits (265,776,395)PSA Double Gold: Earned 500,000,000 credits (666,025,256)
Message 119330 - Posted: 8 Jul 2018 | 0:27:34 UTC - in response to Message 119321.

If it were me, I would fix whatever is wrong with the computer. Might as well abort everything that's in progress since there's a good chance that they're already corrupted and further processing on them would just be wasted.

If the CPU or memory is overclocked, go back to base clocks and see if you stop getting bad results.

Next thing to try is removing the ram and cleaning the contacts. Often, just re-seating the ram can fix the problem, but if you're going to do that you might as well grab a pencil eraser and clean off the contacts while you have the memory out.

It is not normal to get even a single bad result, and you have 3 and probably 5, out of a total of 9.




Hmm, thanks for the input. I will look into it. Those times last May and June when the results occurred I was running A LOT of different stuff at once including different projects. I was also starting/stopping them often. Now i have mainly one task going instead of multiple ones and running them straight through. I will see what happens. I also have some running on other machines. The memory is new and not overclocked at all.

The only bad results have been on these SoB tasks. Though there are a GCW and Cullen task as inconclusive but another machine, not mine, had the same issue.

Everything else seems to be working well and without error issues aside from a few PPS sieve tasks on another machine which have been corrected and some GPU tasks on this machine which have also been corrected.

I will try returning to base clock speeds.

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Discovered 3 mega primesEliminated 1 conjecture "k"Found 1 prime in the 2019 Tour de PrimesFound 15 primes in the 2020 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,211,391)Cullen LLR Ruby: Earned 2,000,000 credits (2,073,913)ESP LLR Jade: Earned 10,000,000 credits (10,390,853)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,139,193)PPS LLR Sapphire: Earned 20,000,000 credits (22,727,857)PSP LLR Jade: Earned 10,000,000 credits (10,276,533)SoB LLR Ruby: Earned 2,000,000 credits (2,092,713)SR5 LLR Jade: Earned 10,000,000 credits (12,619,323)SGS LLR Turquoise: Earned 5,000,000 credits (9,811,987)TRP LLR Turquoise: Earned 5,000,000 credits (5,511,951)Woodall LLR Ruby: Earned 2,000,000 credits (2,289,700)321 Sieve Jade: Earned 10,000,000 credits (10,170,442)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,018,833)PPS Sieve Double Bronze: Earned 100,000,000 credits (106,944,975)TRP Sieve (suspended) Silver: Earned 100,000 credits (110,630)AP 26/27 Emerald: Earned 50,000,000 credits (67,522,143)GFN Double Silver: Earned 200,000,000 credits (265,776,395)PSA Double Gold: Earned 500,000,000 credits (666,025,256)
Message 119331 - Posted: 8 Jul 2018 | 0:29:12 UTC - in response to Message 119322.

I had an FX-8120 a few years back that took over a week per SoB unit, but there was no MT and I ran 7 at a time on it. The newer Intels, like your i5-6400, are significantly faster at SoB than the AMD FX line.
That said, you shouldn't be getting errors no matter how long the task takes. It might be a good idea to do some testing on that FX-8350 system to see what the trouble could be.


So far this is the only known trouble I've had. I will run mem86 or whatever that is to check my memory when I get a chance. For now I returned everything to base speeds and will restart the one task on this machine and see what happens now.

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Discovered 3 mega primesEliminated 1 conjecture "k"Found 1 prime in the 2019 Tour de PrimesFound 15 primes in the 2020 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,211,391)Cullen LLR Ruby: Earned 2,000,000 credits (2,073,913)ESP LLR Jade: Earned 10,000,000 credits (10,390,853)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,139,193)PPS LLR Sapphire: Earned 20,000,000 credits (22,727,857)PSP LLR Jade: Earned 10,000,000 credits (10,276,533)SoB LLR Ruby: Earned 2,000,000 credits (2,092,713)SR5 LLR Jade: Earned 10,000,000 credits (12,619,323)SGS LLR Turquoise: Earned 5,000,000 credits (9,811,987)TRP LLR Turquoise: Earned 5,000,000 credits (5,511,951)Woodall LLR Ruby: Earned 2,000,000 credits (2,289,700)321 Sieve Jade: Earned 10,000,000 credits (10,170,442)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,018,833)PPS Sieve Double Bronze: Earned 100,000,000 credits (106,944,975)TRP Sieve (suspended) Silver: Earned 100,000 credits (110,630)AP 26/27 Emerald: Earned 50,000,000 credits (67,522,143)GFN Double Silver: Earned 200,000,000 credits (265,776,395)PSA Double Gold: Earned 500,000,000 credits (666,025,256)
Message 119332 - Posted: 8 Jul 2018 | 0:49:08 UTC

Windows memory diagnostic tool, which I just found out about, detected no errors.

Base CPU clock restored.

Current SoB task aborted, new started. Will see how the next few turn out.

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Found 2 primes in the 2018 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (6,002,936)Cullen LLR Turquoise: Earned 5,000,000 credits (5,005,909)ESP LLR Turquoise: Earned 5,000,000 credits (5,303,526)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,202,873)PPS LLR Turquoise: Earned 5,000,000 credits (5,900,040)PSP LLR Turquoise: Earned 5,000,000 credits (5,513,728)SoB LLR Turquoise: Earned 5,000,000 credits (8,851,996)SR5 LLR Turquoise: Earned 5,000,000 credits (5,199,189)SGS LLR Turquoise: Earned 5,000,000 credits (5,099,260)TRP LLR Turquoise: Earned 5,000,000 credits (5,008,328)Woodall LLR Turquoise: Earned 5,000,000 credits (5,124,820)321 Sieve Ruby: Earned 2,000,000 credits (4,669,889)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (268,250)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,502)PPS Sieve Double Silver: Earned 200,000,000 credits (300,002,145)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,133)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,970)AP 26/27 Double Bronze: Earned 100,000,000 credits (138,363,589)GFN Double Bronze: Earned 100,000,000 credits (130,000,018)PSA Double Silver: Earned 200,000,000 credits (200,000,001)
Message 119335 - Posted: 8 Jul 2018 | 5:07:38 UTC

A few years ago I had 4 SoBs going & after stopping & restarting several times over their 4-day period all of a sudden upon restarting again they all went BOOM & blew up. Were 3 days in so 12 days of processing wasted.

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Discovered 3 mega primesEliminated 1 conjecture "k"Found 1 prime in the 2019 Tour de PrimesFound 15 primes in the 2020 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,211,391)Cullen LLR Ruby: Earned 2,000,000 credits (2,073,913)ESP LLR Jade: Earned 10,000,000 credits (10,390,853)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,139,193)PPS LLR Sapphire: Earned 20,000,000 credits (22,727,857)PSP LLR Jade: Earned 10,000,000 credits (10,276,533)SoB LLR Ruby: Earned 2,000,000 credits (2,092,713)SR5 LLR Jade: Earned 10,000,000 credits (12,619,323)SGS LLR Turquoise: Earned 5,000,000 credits (9,811,987)TRP LLR Turquoise: Earned 5,000,000 credits (5,511,951)Woodall LLR Ruby: Earned 2,000,000 credits (2,289,700)321 Sieve Jade: Earned 10,000,000 credits (10,170,442)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,018,833)PPS Sieve Double Bronze: Earned 100,000,000 credits (106,944,975)TRP Sieve (suspended) Silver: Earned 100,000 credits (110,630)AP 26/27 Emerald: Earned 50,000,000 credits (67,522,143)GFN Double Silver: Earned 200,000,000 credits (265,776,395)PSA Double Gold: Earned 500,000,000 credits (666,025,256)
Message 119339 - Posted: 8 Jul 2018 | 12:53:20 UTC - in response to Message 119335.

A few years ago I had 4 SoBs going & after stopping & restarting several times over their 4-day period all of a sudden upon restarting again they all went BOOM & blew up. Were 3 days in so 12 days of processing wasted.


lol, yep, that could be similar to my issue. Its hard to keep the running for 2-3 days on this main machine with other things going on. I will try.

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Eliminated 1 conjecture "k"Found 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Silver: Earned 100,000 credits (229,492)Cullen LLR Silver: Earned 100,000 credits (110,733)PPS LLR Turquoise: Earned 5,000,000 credits (5,561,410)PSP LLR Silver: Earned 100,000 credits (104,385)SoB LLR Silver: Earned 100,000 credits (106,117)SR5 LLR Silver: Earned 100,000 credits (139,802)SGS LLR Amethyst: Earned 1,000,000 credits (1,321,855)TRP LLR Silver: Earned 100,000 credits (122,712)Woodall LLR Silver: Earned 100,000 credits (122,944)321 Sieve Silver: Earned 100,000 credits (104,900)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,599)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (515,556)PPS Sieve Jade: Earned 10,000,000 credits (11,363,809)TRP Sieve (suspended) Silver: Earned 100,000 credits (255,612)AP 26/27 Ruby: Earned 2,000,000 credits (2,579,917)GFN Sapphire: Earned 20,000,000 credits (23,317,420)PSA Turquoise: Earned 5,000,000 credits (7,522,050)
Message 119395 - Posted: 11 Jul 2018 | 9:26:50 UTC - in response to Message 119339.
Last modified: 11 Jul 2018 | 9:27:24 UTC

One more thing about AMD CPU ( that was heapen several times)
From unknown reason AMD CPU start to freeze from time time, then work few days perfectly.
Solution: remove cooler, remove CPU from socket, put CPU to socket again and put cooler back. I do that and next two years was no problem at all. So it looks like something is shifted in socket ( maybe from fan vibration) or from hot-cool period ( when computer is on or off)
Dont know is that case with you but cannot be hurt to do that.

Memory diagnostic from Windows will not find many errors at all. use memtest86+: it is very good tool and will find far more errors then windows diag tool
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Discovered 3 mega primesEliminated 1 conjecture "k"Found 1 prime in the 2019 Tour de PrimesFound 15 primes in the 2020 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,211,391)Cullen LLR Ruby: Earned 2,000,000 credits (2,073,913)ESP LLR Jade: Earned 10,000,000 credits (10,390,853)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,139,193)PPS LLR Sapphire: Earned 20,000,000 credits (22,727,857)PSP LLR Jade: Earned 10,000,000 credits (10,276,533)SoB LLR Ruby: Earned 2,000,000 credits (2,092,713)SR5 LLR Jade: Earned 10,000,000 credits (12,619,323)SGS LLR Turquoise: Earned 5,000,000 credits (9,811,987)TRP LLR Turquoise: Earned 5,000,000 credits (5,511,951)Woodall LLR Ruby: Earned 2,000,000 credits (2,289,700)321 Sieve Jade: Earned 10,000,000 credits (10,170,442)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,018,833)PPS Sieve Double Bronze: Earned 100,000,000 credits (106,944,975)TRP Sieve (suspended) Silver: Earned 100,000 credits (110,630)AP 26/27 Emerald: Earned 50,000,000 credits (67,522,143)GFN Double Silver: Earned 200,000,000 credits (265,776,395)PSA Double Gold: Earned 500,000,000 credits (666,025,256)
Message 119396 - Posted: 11 Jul 2018 | 10:23:38 UTC - in response to Message 119395.

One more thing about AMD CPU ( that was heapen several times)
From unknown reason AMD CPU start to freeze from time time, then work few days perfectly.
Solution: remove cooler, remove CPU from socket, put CPU to socket again and put cooler back. I do that and next two years was no problem at all. So it looks like something is shifted in socket ( maybe from fan vibration) or from hot-cool period ( when computer is on or off)
Dont know is that case with you but cannot be hurt to do that.

Memory diagnostic from Windows will not find many errors at all. use memtest86+: it is very good tool and will find far more errors then windows diag tool


Thanks for the tip with the cpu and memtes86+. I don't think it's a socket issue. And memtest96+ was my original choice. I will run that through a few complete passes and see what the results are. Thanks again.

I am saving for a major upgrade within the next year or two. Basically everything except the hdds, blu ray drive, and the video card. Going to go Intel this next build for sure. Just better number crunching.

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Discovered 3 mega primesEliminated 1 conjecture "k"Found 1 prime in the 2019 Tour de PrimesFound 15 primes in the 2020 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,211,391)Cullen LLR Ruby: Earned 2,000,000 credits (2,073,913)ESP LLR Jade: Earned 10,000,000 credits (10,390,853)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,139,193)PPS LLR Sapphire: Earned 20,000,000 credits (22,727,857)PSP LLR Jade: Earned 10,000,000 credits (10,276,533)SoB LLR Ruby: Earned 2,000,000 credits (2,092,713)SR5 LLR Jade: Earned 10,000,000 credits (12,619,323)SGS LLR Turquoise: Earned 5,000,000 credits (9,811,987)TRP LLR Turquoise: Earned 5,000,000 credits (5,511,951)Woodall LLR Ruby: Earned 2,000,000 credits (2,289,700)321 Sieve Jade: Earned 10,000,000 credits (10,170,442)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,018,833)PPS Sieve Double Bronze: Earned 100,000,000 credits (106,944,975)TRP Sieve (suspended) Silver: Earned 100,000 credits (110,630)AP 26/27 Emerald: Earned 50,000,000 credits (67,522,143)GFN Double Silver: Earned 200,000,000 credits (265,776,395)PSA Double Gold: Earned 500,000,000 credits (666,025,256)
Message 119397 - Posted: 11 Jul 2018 | 12:03:51 UTC - in response to Message 119396.

memtest86+ running on the 8350 machine. First pass won't be done b4 I go to work so I'm going to let it run several passes as I mentioned. About 100min to check the 32gb. Will see what the results are by this evening.

Thanks again for the help everyone.

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Discovered 3 mega primesEliminated 1 conjecture "k"Found 1 prime in the 2019 Tour de PrimesFound 15 primes in the 2020 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,211,391)Cullen LLR Ruby: Earned 2,000,000 credits (2,073,913)ESP LLR Jade: Earned 10,000,000 credits (10,390,853)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,139,193)PPS LLR Sapphire: Earned 20,000,000 credits (22,727,857)PSP LLR Jade: Earned 10,000,000 credits (10,276,533)SoB LLR Ruby: Earned 2,000,000 credits (2,092,713)SR5 LLR Jade: Earned 10,000,000 credits (12,619,323)SGS LLR Turquoise: Earned 5,000,000 credits (9,811,987)TRP LLR Turquoise: Earned 5,000,000 credits (5,511,951)Woodall LLR Ruby: Earned 2,000,000 credits (2,289,700)321 Sieve Jade: Earned 10,000,000 credits (10,170,442)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,018,833)PPS Sieve Double Bronze: Earned 100,000,000 credits (106,944,975)TRP Sieve (suspended) Silver: Earned 100,000 credits (110,630)AP 26/27 Emerald: Earned 50,000,000 credits (67,522,143)GFN Double Silver: Earned 200,000,000 credits (265,776,395)PSA Double Gold: Earned 500,000,000 credits (666,025,256)
Message 119408 - Posted: 11 Jul 2018 | 19:07:52 UTC - in response to Message 119397.

memtest86+ running on the 8350 machine. First pass won't be done b4 I go to work so I'm going to let it run several passes as I mentioned. About 100min to check the 32gb. Will see what the results are by this evening.

Thanks again for the help everyone.


7 hrs later, no memory errors detected. Back to crunching.

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Eliminated 1 conjecture "k"Found 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Silver: Earned 100,000 credits (229,492)Cullen LLR Silver: Earned 100,000 credits (110,733)PPS LLR Turquoise: Earned 5,000,000 credits (5,561,410)PSP LLR Silver: Earned 100,000 credits (104,385)SoB LLR Silver: Earned 100,000 credits (106,117)SR5 LLR Silver: Earned 100,000 credits (139,802)SGS LLR Amethyst: Earned 1,000,000 credits (1,321,855)TRP LLR Silver: Earned 100,000 credits (122,712)Woodall LLR Silver: Earned 100,000 credits (122,944)321 Sieve Silver: Earned 100,000 credits (104,900)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,599)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (515,556)PPS Sieve Jade: Earned 10,000,000 credits (11,363,809)TRP Sieve (suspended) Silver: Earned 100,000 credits (255,612)AP 26/27 Ruby: Earned 2,000,000 credits (2,579,917)GFN Sapphire: Earned 20,000,000 credits (23,317,420)PSA Turquoise: Earned 5,000,000 credits (7,522,050)
Message 119420 - Posted: 12 Jul 2018 | 14:38:11 UTC - in response to Message 119408.

memtest86+ running on the 8350 machine. First pass won't be done b4 I go to work so I'm going to let it run several passes as I mentioned. About 100min to check the 32gb. Will see what the results are by this evening.

Thanks again for the help everyone.


7 hrs later, no memory errors detected. Back to crunching.


So memory is not faulty, but problem still exist. So you still have problem, and using those type of SOB task ,you in the time throw away big time for nothing ( if WU completed and marked as invalid)
Stop doing SOB, take shortest task and observe you computer. You can back to SOB every time later
____________
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Credit: 1,211,723,803
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Discovered 3 mega primesEliminated 1 conjecture "k"Found 1 prime in the 2019 Tour de PrimesFound 15 primes in the 2020 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,211,391)Cullen LLR Ruby: Earned 2,000,000 credits (2,073,913)ESP LLR Jade: Earned 10,000,000 credits (10,390,853)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,139,193)PPS LLR Sapphire: Earned 20,000,000 credits (22,727,857)PSP LLR Jade: Earned 10,000,000 credits (10,276,533)SoB LLR Ruby: Earned 2,000,000 credits (2,092,713)SR5 LLR Jade: Earned 10,000,000 credits (12,619,323)SGS LLR Turquoise: Earned 5,000,000 credits (9,811,987)TRP LLR Turquoise: Earned 5,000,000 credits (5,511,951)Woodall LLR Ruby: Earned 2,000,000 credits (2,289,700)321 Sieve Jade: Earned 10,000,000 credits (10,170,442)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,018,833)PPS Sieve Double Bronze: Earned 100,000,000 credits (106,944,975)TRP Sieve (suspended) Silver: Earned 100,000 credits (110,630)AP 26/27 Emerald: Earned 50,000,000 credits (67,522,143)GFN Double Silver: Earned 200,000,000 credits (265,776,395)PSA Double Gold: Earned 500,000,000 credits (666,025,256)
Message 119422 - Posted: 12 Jul 2018 | 19:53:59 UTC - in response to Message 119420.

memtest86+ running on the 8350 machine. First pass won't be done b4 I go to work so I'm going to let it run several passes as I mentioned. About 100min to check the 32gb. Will see what the results are by this evening.

Thanks again for the help everyone.


7 hrs later, no memory errors detected. Back to crunching.


So memory is not faulty, but problem still exist. So you still have problem, and using those type of SOB task ,you in the time throw away big time for nothing ( if WU completed and marked as invalid)
Stop doing SOB, take shortest task and observe you computer. You can back to SOB every time later


The CPU clock speeds have been un-overclocked, so the need to run more SOB still exists to see if overclocking caused the issue.

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Discovered 3 mega primesEliminated 1 conjecture "k"Found 1 prime in the 2019 Tour de PrimesFound 15 primes in the 2020 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,211,391)Cullen LLR Ruby: Earned 2,000,000 credits (2,073,913)ESP LLR Jade: Earned 10,000,000 credits (10,390,853)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,139,193)PPS LLR Sapphire: Earned 20,000,000 credits (22,727,857)PSP LLR Jade: Earned 10,000,000 credits (10,276,533)SoB LLR Ruby: Earned 2,000,000 credits (2,092,713)SR5 LLR Jade: Earned 10,000,000 credits (12,619,323)SGS LLR Turquoise: Earned 5,000,000 credits (9,811,987)TRP LLR Turquoise: Earned 5,000,000 credits (5,511,951)Woodall LLR Ruby: Earned 2,000,000 credits (2,289,700)321 Sieve Jade: Earned 10,000,000 credits (10,170,442)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,018,833)PPS Sieve Double Bronze: Earned 100,000,000 credits (106,944,975)TRP Sieve (suspended) Silver: Earned 100,000 credits (110,630)AP 26/27 Emerald: Earned 50,000,000 credits (67,522,143)GFN Double Silver: Earned 200,000,000 credits (265,776,395)PSA Double Gold: Earned 500,000,000 credits (666,025,256)
Message 119455 - Posted: 16 Jul 2018 | 11:25:36 UTC

As Michael Goetz said above, it seems to be this AMD 8350 machine. I don't know what is causing the problems, but it seems to just not be a good machine for SoB tasks. On the two other Intel machines, no issues. I checked the RAM, I returned the CPU to stock speeds, and still had issues with the main machine. It is my main machine and I do a lot of different things with it so no more SoB for now with that machine.

I just got my GOLD badge for SoB so I will be crunching other sub-projects with this AMD 8350.

Thank you everyone for your suggestions, ideas, and support.

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321 LLR Jade: Earned 10,000,000 credits (16,776,661)Cullen LLR Turquoise: Earned 5,000,000 credits (5,348,345)ESP LLR Turquoise: Earned 5,000,000 credits (9,069,027)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (8,844,412)PPS LLR Turquoise: Earned 5,000,000 credits (5,685,953)PSP LLR Jade: Earned 10,000,000 credits (11,359,246)SoB LLR Sapphire: Earned 20,000,000 credits (29,894,368)SR5 LLR Turquoise: Earned 5,000,000 credits (7,426,546)SGS LLR Ruby: Earned 2,000,000 credits (4,526,076)TRP LLR Turquoise: Earned 5,000,000 credits (6,245,157)Woodall LLR Turquoise: Earned 5,000,000 credits (7,154,312)321 Sieve Ruby: Earned 2,000,000 credits (2,923,179)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (11,205,264)PPS Sieve Double Silver: Earned 200,000,000 credits (236,259,906)AP 26/27 Sapphire: Earned 20,000,000 credits (25,212,148)GFN Emerald: Earned 50,000,000 credits (56,243,798)
Message 124176 - Posted: 3 Jan 2019 | 11:52:06 UTC - in response to Message 119408.
Last modified: 3 Jan 2019 | 11:52:50 UTC

Penguin wrote:
Penguin wrote:
memtest86+ running on the 8350 machine.

7 hrs later, no memory errors detected. Back to crunching.

At work, we had a PC on which some application programs kept crashing at random. Not very frequently, but enough to be perceived as a problem to be corrected. Memtest86+ took more than a day to hit a memory fault on this machine. We replaced the RAM and the problems were gone.

The difference between SoB-LLR and the other LLR subprojects at PrimeGrid is that SoB currently has the largest FFT sizes, AFAIK. (Somebody correct me if I'm wrong about this.)

FX-8350 (i.e. 4M/8C Piledriver) has got 2 MB L2 cache per module plus 8 MB L3 cache shared across all modules. (I can't find right now whether it's inclusive or exclusive L3.) This amount of cache is less than half of what a single SoB-LLR task needs for its "hot" data (see e.g. this post), but enough for most of the other LLR subprojects (if the bigger ones among them are configured for running only 1 task at a time on desktop processors such as yours). This means that SoB-LLR needs to read and write RAM a lot more frequently than the other LLR subprojects. Combined with long durations per task, this makes for a lot more memory accesses per task in comparison to other LLR subprojects.

Hence an unstable RAM module, or bad contact somewhere between CPU and RAM, could still be candidates for the errors which you saw, IMO.

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321 LLR Silver: Earned 100,000 credits (173,188)Cullen LLR Silver: Earned 100,000 credits (283,068)PPS LLR Bronze: Earned 10,000 credits (17,310)PSP LLR Silver: Earned 100,000 credits (460,640)SoB LLR Gold: Earned 500,000 credits (846,669)SR5 LLR Bronze: Earned 10,000 credits (13,904)TRP LLR Bronze: Earned 10,000 credits (98,651)Woodall LLR Silver: Earned 100,000 credits (496,864)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (22,232)PPS Sieve Ruby: Earned 2,000,000 credits (2,076,536)TRP Sieve (suspended) Bronze: Earned 10,000 credits (38,655)GFN Turquoise: Earned 5,000,000 credits (6,369,603)
Message 124302 - Posted: 4 Jan 2019 | 17:00:00 UTC
Last modified: 4 Jan 2019 | 17:02:25 UTC

I am having problems getting S.O.B. jobs to finish within the deadline. I currently run a stock (non-overclocked) I7 8550U, 12 Gb main memory, although not multi-threaded. I currently have a task that is 86.49% complete with 4 days to go showing, (that figure does not come down as fast as it should, though...) that was due on Dec 26, 2018 - it shows as running for 28 days, so far! Any hints?
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Discovered 1 mega primeFound 2 primes in the 2018 Tour de PrimesFound 3 primes in the 2019 Tour de PrimesFound 2 primes in the 2020 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,055,954)Cullen LLR Turquoise: Earned 5,000,000 credits (5,064,934)ESP LLR Turquoise: Earned 5,000,000 credits (5,005,551)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,002,124)PPS LLR Turquoise: Earned 5,000,000 credits (9,873,020)PSP LLR Turquoise: Earned 5,000,000 credits (5,032,097)SoB LLR Turquoise: Earned 5,000,000 credits (9,976,992)SR5 LLR Turquoise: Earned 5,000,000 credits (9,999,552)SGS LLR Turquoise: Earned 5,000,000 credits (5,942,927)TRP LLR Turquoise: Earned 5,000,000 credits (5,759,074)Woodall LLR Turquoise: Earned 5,000,000 credits (5,053,050)321 Sieve Jade: Earned 10,000,000 credits (10,120,432)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,004,494)PPS Sieve Double Bronze: Earned 100,000,000 credits (100,111,958)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,002,980)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,010,755)AP 26/27 Emerald: Earned 50,000,000 credits (78,413,985)GFN Emerald: Earned 50,000,000 credits (94,075,725)PSA Silver: Earned 100,000 credits (442,843)
Message 124304 - Posted: 4 Jan 2019 | 17:11:13 UTC - in response to Message 124302.

I am having problems getting S.O.B. jobs to finish within the deadline. I currently run a stock (non-overclocked) I7 8550U, 12 Gb main memory, although not multi-threaded. I currently have a task that is 86.49% complete with 4 days to go showing, (that figure does not come down as fast as it should, though...) that was due on Dec 26, 2018 - it shows as running for 28 days, so far! Any hints?


The original deadline may have been December 26th, but there are variable deadlines in place. So you can look on your Tasks page and see that the current deadline is January 11th.
The initial deadline is currently 35 days and it will extend out to 140 days as long as you continue to do work. Even if you pass the 140 days there is a possibility (not a guarantee) of still being able to return that task for full credit.

Are you running 24/7 or just some hours of the day?
Multithreading can definitely help reduce the run time by a significant amount. So it is recommended for larger tasks where meeting the initial deadline can be an issue.
You have a quad core so in theory you can reduce the run time by up to 75% with running the one task on all four cores. However, this may cause more heat to be made and since that's a "U" CPU it's probably in a small device with little ventilation. So keeping an eye on the temperatures would be a good idea.
____________
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,822,730)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Turquoise: Earned 5,000,000 credits (5,009,577)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Jade: Earned 10,000,000 credits (12,841,928)PSP LLR Turquoise: Earned 5,000,000 credits (5,197,957)SoB LLR Sapphire: Earned 20,000,000 credits (34,291,181)SR5 LLR Jade: Earned 10,000,000 credits (10,002,028)SGS LLR Ruby: Earned 2,000,000 credits (2,275,252)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Turquoise: Earned 5,000,000 credits (8,242,519)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,114,159)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Jade: Earned 10,000,000 credits (10,114,260)GFN Emerald: Earned 50,000,000 credits (72,213,603)PSA Jade: Earned 10,000,000 credits (12,404,447)
Message 124305 - Posted: 4 Jan 2019 | 17:41:30 UTC - in response to Message 124302.

I am having problems getting S.O.B. jobs to finish within the deadline. I currently run a stock (non-overclocked) I7 8550U, 12 Gb main memory, although not multi-threaded. I currently have a task that is 86.49% complete with 4 days to go showing, (that figure does not come down as fast as it should, though...) that was due on Dec 26, 2018 - it shows as running for 28 days, so far! Any hints?


The following two paragraphs apply to a "normal" usage pattern where you would be running 8 SoB tasks on your computer. I realize that doesn't describe your situation; I'll get to that afterwards.

You have a hyperthreaded CPU (4 cores/8 threads), and hyperthreading hurts overall throughput. If you run 8 LLR tasks (such as SoB) at once, they take MORE than twice as long as running just 4 tasks at once. If you haven't already done so, you should set your boinc preferences to "use only 50% of the processors" to effectively turn off hyperthreading.

If you also set up multi-threading, running one task consuming the 4 cores, you'll find that the task actually runs MORE than 4 times as fast. Between disabling hyperthreading and using multi-threading, you'll get tasks that run more than 8 times faster.

Now back to your specific situation. There's no way your computer should take that long to run an SoB task.

There has to be some reason that the SoB task is running so slowly, and it's not anything that's visible from our end. It's up to you to describe what else the computer is doing, or what else is running on the computer, if you want help from here. We simply don't have the visibility into what else is happening in your computer.

You have only one task running on there. I don't know if the rest of the computer is idle, or if you're running tasks from other projects. What I can say is that I have a much older and slower Haswell i3 laptop than can do an SoB in 5 to 6 days using 2 cores, so, at most, your computer should need less than 12 days to run an SoB on a single core.

Looking in the database, computers with the same CPU as yours have completed SoB tasks using between 8 and 13 days of CPU time. Your computer has been working on this task for 44 days. Something's clearly wrong.
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321 LLR Jade: Earned 10,000,000 credits (16,776,661)Cullen LLR Turquoise: Earned 5,000,000 credits (5,348,345)ESP LLR Turquoise: Earned 5,000,000 credits (9,069,027)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (8,844,412)PPS LLR Turquoise: Earned 5,000,000 credits (5,685,953)PSP LLR Jade: Earned 10,000,000 credits (11,359,246)SoB LLR Sapphire: Earned 20,000,000 credits (29,894,368)SR5 LLR Turquoise: Earned 5,000,000 credits (7,426,546)SGS LLR Ruby: Earned 2,000,000 credits (4,526,076)TRP LLR Turquoise: Earned 5,000,000 credits (6,245,157)Woodall LLR Turquoise: Earned 5,000,000 credits (7,154,312)321 Sieve Ruby: Earned 2,000,000 credits (2,923,179)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (11,205,264)PPS Sieve Double Silver: Earned 200,000,000 credits (236,259,906)AP 26/27 Sapphire: Earned 20,000,000 credits (25,212,148)GFN Emerald: Earned 50,000,000 credits (56,243,798)
Message 124325 - Posted: 4 Jan 2019 | 23:55:57 UTC
Last modified: 5 Jan 2019 | 0:04:23 UTC

I wonder whether multithreading makes that much of a difference on a KBL-R CPU which is power-limited down to 10/15/25(?) W.

KBL-S at 4.2 GHz on dual-channel RAM, with LLR's multithreading enabled, completes a SoB task in less than a day. Running SoB-LLR single-threaded but nothing else on this CPU at the same clock takes about 3 times as long.

Let's say you run the single-threaded SoB-LLR task and nothing else on your KBL-R at 1 GHz (with dual-channel RAM I presume). This should take less than 12 days. This coincides with what Michael saw in the database.

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321 LLR Silver: Earned 100,000 credits (173,188)Cullen LLR Silver: Earned 100,000 credits (283,068)PPS LLR Bronze: Earned 10,000 credits (17,310)PSP LLR Silver: Earned 100,000 credits (460,640)SoB LLR Gold: Earned 500,000 credits (846,669)SR5 LLR Bronze: Earned 10,000 credits (13,904)TRP LLR Bronze: Earned 10,000 credits (98,651)Woodall LLR Silver: Earned 100,000 credits (496,864)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (22,232)PPS Sieve Ruby: Earned 2,000,000 credits (2,076,536)TRP Sieve (suspended) Bronze: Earned 10,000 credits (38,655)GFN Turquoise: Earned 5,000,000 credits (6,369,603)
Message 124356 - Posted: 5 Jan 2019 | 18:30:49 UTC
Last modified: 5 Jan 2019 | 18:35:31 UTC

To answer the questions raised:

1) yes, that computer runs 24/7, power failures and Micro$oft Win 10 updates permitting.

2) that computer is also (currently) running 7 SETi@home CPU tasks, and a SAH Beta GPU task.

3) I don't know if I have Dual-channel RAM with two sticks of RAM in this computer - it is under warranty, and I don't want to unscrew the back to find out... With 12Gb, I probably have 8 and a 4 Gb sticks of SODIMM, so I only have the benefit of dual channel on 8 Gb...

Notice that I say "that computer", as I have 7 currently running, (5 laptops) with at least another three waiting for me to fix them! (I just got back from a 'round the world trip Dec 26, and am only now getting my biologic clock back on my home time zone {American Pacific Standard Time...[there is a Australian Pacific time zone, too, as I understand it...]})

When I gave my figures, I had to use the figure in the "elapsed" column, as I don't know when this task actually started, not being home at the time (see last paragraph...) that the WU started. I would not be surprised if the discrepancy is because the WU started and was then laid aside for other higher-priority WU's, not necessarily from PrimeGrid, or because PrimeGrid ran out of allotted "Resource Share" time... (as I recall, I got 8 PG WU's at once, only one of which was this SOB task...)

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321 LLR Jade: Earned 10,000,000 credits (16,776,661)Cullen LLR Turquoise: Earned 5,000,000 credits (5,348,345)ESP LLR Turquoise: Earned 5,000,000 credits (9,069,027)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (8,844,412)PPS LLR Turquoise: Earned 5,000,000 credits (5,685,953)PSP LLR Jade: Earned 10,000,000 credits (11,359,246)SoB LLR Sapphire: Earned 20,000,000 credits (29,894,368)SR5 LLR Turquoise: Earned 5,000,000 credits (7,426,546)SGS LLR Ruby: Earned 2,000,000 credits (4,526,076)TRP LLR Turquoise: Earned 5,000,000 credits (6,245,157)Woodall LLR Turquoise: Earned 5,000,000 credits (7,154,312)321 Sieve Ruby: Earned 2,000,000 credits (2,923,179)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (11,205,264)PPS Sieve Double Silver: Earned 200,000,000 credits (236,259,906)AP 26/27 Sapphire: Earned 20,000,000 credits (25,212,148)GFN Emerald: Earned 50,000,000 credits (56,243,798)
Message 124363 - Posted: 5 Jan 2019 | 22:54:13 UTC - in response to Message 124356.
Last modified: 5 Jan 2019 | 23:10:38 UTC

So, do you run the SoB-LLR task together with SETI@Home CPU tasks and/or with a S@H GPU task? All of these are memory intensive, and degrade each others' performance.

My suggestion:
1. Suspend the SoB task.
2. Finish all SETI tasks and don't fetch more.
3. Create a projects\www.primegrid.com\app_config.xml which specifies multithreading for llrSOB. See e.g. the top of the current Conjunction of Venus & Jupiter Challenge forum thread for an example file.
4. Shutdown and restart the boinc-client to bring the app_config.xml into effect.
5. Resume the SoB task and run it exclusively. Double-check in taskmanager that the task is indeed using more than one core.

Most of PrimeGrid's LLR based subprojects run very poorly if not multithreaded (or rather: if they they run together with other tasks and have to fight them for cache and for RAM bandwidth). On another note, I was never satisfied with boinc-client's built-in task scheduling policy whenever I had a mix of singlethreaded and multithreaded applications. Therefore I never mix them anymore; when I want to run a multithreaded application, I run it exclusively and have all other BOINC projects disabled.

dukebg
Volunteer tester
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Joined: 21 Nov 17
Posts: 235
ID: 950482
Credit: 23,170,125
RAC: 7
Found 1 prime in the 2018 Tour de Primes321 LLR Gold: Earned 500,000 credits (506,942)Cullen LLR Gold: Earned 500,000 credits (500,523)ESP LLR Gold: Earned 500,000 credits (655,642)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (539,100)PPS LLR Gold: Earned 500,000 credits (688,232)PSP LLR Gold: Earned 500,000 credits (561,629)SoB LLR Ruby: Earned 2,000,000 credits (3,659,676)SR5 LLR Gold: Earned 500,000 credits (505,810)SGS LLR Gold: Earned 500,000 credits (506,024)TRP LLR Gold: Earned 500,000 credits (963,625)Woodall LLR Gold: Earned 500,000 credits (506,044)321 Sieve Gold: Earned 500,000 credits (511,694)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (549,916)PPS Sieve Gold: Earned 500,000 credits (701,168)AP 26/27 Gold: Earned 500,000 credits (525,590)GFN Jade: Earned 10,000,000 credits (10,762,872)PSA Gold: Earned 500,000 credits (525,639)
Message 124380 - Posted: 6 Jan 2019 | 13:22:12 UTC - in response to Message 124356.

I don't know if I have Dual-channel RAM with two sticks of RAM in this computer - it is under warranty, and I don't want to unscrew the back to find out...

You don't need to look at it physically to find out at all. Actually, how would you even tell by looking into the case if the stick is single-channel or dual-channel...

Instead download and run cpu-z and have a look at the memory tab there. You can also look at the SPD tab to see details about what stick is in what slot.

Message boards : Seventeen or Bust : SoB tasks can really be a S.O.B. to accomplish

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