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Message boards : Generalized Fermat Prime Search : Genefer-19 tasks invalid

Author Message
Jim WilkinsProject donor
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Joined: 4 Sep 07
Posts: 197
ID: 11784
Credit: 85,039,666
RAC: 33,332
321 LLR Ruby: Earned 2,000,000 credits (2,193,583)Cullen LLR Ruby: Earned 2,000,000 credits (2,543,202)ESP LLR Ruby: Earned 2,000,000 credits (3,407,901)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,838,486)PPS LLR Ruby: Earned 2,000,000 credits (2,164,428)PSP LLR Turquoise: Earned 5,000,000 credits (5,016,831)SoB LLR Turquoise: Earned 5,000,000 credits (5,380,169)SR5 LLR Ruby: Earned 2,000,000 credits (2,100,061)SGS LLR Ruby: Earned 2,000,000 credits (2,042,780)TRP LLR Ruby: Earned 2,000,000 credits (2,128,024)Woodall LLR Ruby: Earned 2,000,000 credits (2,810,079)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,010,304)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (200,004)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,001,945)PPS Sieve Sapphire: Earned 20,000,000 credits (32,541,318)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,010,599)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,124,676)AP 26/27 Turquoise: Earned 5,000,000 credits (5,488,888)GFN Turquoise: Earned 5,000,000 credits (8,036,348)
Message 151517 - Posted: 14 Sep 2021 | 7:51:11 UTC

All,

All of a sudden I am getting invalid results in Genefer-19. This is after many valid results. How do I research this?
____________
Thanks,
Jim

Profile Michael GoetzProject donor
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Joined: 21 Jan 10
Posts: 13655
ID: 53948
Credit: 294,326,706
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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 PrimesFound 2 primes in the 2021 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,132,712)Cullen LLR Turquoise: Earned 5,000,000 credits (5,038,114)ESP LLR Turquoise: Earned 5,000,000 credits (6,177,890)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (4,614,303)PPS LLR Sapphire: Earned 20,000,000 credits (20,751,038)PSP LLR Turquoise: Earned 5,000,000 credits (7,956,186)SoB LLR Sapphire: Earned 20,000,000 credits (36,067,618)SR5 LLR Jade: Earned 10,000,000 credits (10,007,110)SGS LLR Ruby: Earned 2,000,000 credits (3,742,794)TRP LLR Turquoise: Earned 5,000,000 credits (5,084,329)Woodall LLR Turquoise: Earned 5,000,000 credits (5,032,821)321 Sieve (suspended) Jade: Earned 10,000,000 credits (10,061,196)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 (22,885,121)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 (10,118,303)GFN Emerald: Earned 50,000,000 credits (78,031,938)WW Sapphire: Earned 20,000,000 credits (38,864,000)PSA Jade: Earned 10,000,000 credits (12,445,029)
Message 151521 - Posted: 14 Sep 2021 | 16:26:26 UTC

If you look in the stderr log on the respective task pages, you'll see that both invalid tasks had a "maxerr exceeded" error, followed by trying to recover by reverting to the last checkpoint. Furthermore, both tasks were running at the same point in time.

I suspect that your computer experienced some sort of fault or glitch which altered either the CPU state, cache, or main memory, affecting and corrupting both calculations. If this continues to happen, then you need to start diagnosing the computer hardware. If it doesn't happen again, I wouldn't worry about it too much, but I'd keep an eye out for future occurances.
____________
My lucky number is 75898524288+1

Jim WilkinsProject donor
Send message
Joined: 4 Sep 07
Posts: 197
ID: 11784
Credit: 85,039,666
RAC: 33,332
321 LLR Ruby: Earned 2,000,000 credits (2,193,583)Cullen LLR Ruby: Earned 2,000,000 credits (2,543,202)ESP LLR Ruby: Earned 2,000,000 credits (3,407,901)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,838,486)PPS LLR Ruby: Earned 2,000,000 credits (2,164,428)PSP LLR Turquoise: Earned 5,000,000 credits (5,016,831)SoB LLR Turquoise: Earned 5,000,000 credits (5,380,169)SR5 LLR Ruby: Earned 2,000,000 credits (2,100,061)SGS LLR Ruby: Earned 2,000,000 credits (2,042,780)TRP LLR Ruby: Earned 2,000,000 credits (2,128,024)Woodall LLR Ruby: Earned 2,000,000 credits (2,810,079)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,010,304)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (200,004)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,001,945)PPS Sieve Sapphire: Earned 20,000,000 credits (32,541,318)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,010,599)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,124,676)AP 26/27 Turquoise: Earned 5,000,000 credits (5,488,888)GFN Turquoise: Earned 5,000,000 credits (8,036,348)
Message 151523 - Posted: 14 Sep 2021 | 19:26:58 UTC - in response to Message 151521.

Thanks...

Jim

Jim WilkinsProject donor
Send message
Joined: 4 Sep 07
Posts: 197
ID: 11784
Credit: 85,039,666
RAC: 33,332
321 LLR Ruby: Earned 2,000,000 credits (2,193,583)Cullen LLR Ruby: Earned 2,000,000 credits (2,543,202)ESP LLR Ruby: Earned 2,000,000 credits (3,407,901)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,838,486)PPS LLR Ruby: Earned 2,000,000 credits (2,164,428)PSP LLR Turquoise: Earned 5,000,000 credits (5,016,831)SoB LLR Turquoise: Earned 5,000,000 credits (5,380,169)SR5 LLR Ruby: Earned 2,000,000 credits (2,100,061)SGS LLR Ruby: Earned 2,000,000 credits (2,042,780)TRP LLR Ruby: Earned 2,000,000 credits (2,128,024)Woodall LLR Ruby: Earned 2,000,000 credits (2,810,079)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,010,304)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (200,004)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,001,945)PPS Sieve Sapphire: Earned 20,000,000 credits (32,541,318)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,010,599)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,124,676)AP 26/27 Turquoise: Earned 5,000,000 credits (5,488,888)GFN Turquoise: Earned 5,000,000 credits (8,036,348)
Message 151540 - Posted: 16 Sep 2021 | 16:21:28 UTC
Last modified: 16 Sep 2021 | 16:39:23 UTC

I have another "invalid", this time on GFN16. This is the STDERR data:

<core_client_version>7.16.11</core_client_version>
<![CDATA[
<stderr_txt>
geneferocl 3.3.3-2 (Windows/OpenCL/32-bit)

Copyright 2001-2018, Yves Gallot
Copyright 2009, Mark Rodenkirch, David Underbakke
Copyright 2010-2012, Shoichiro Yamada, Ken Brazier
Copyright 2011-2014, Michael Goetz, Ronald Schneider
Copyright 2011-2018, Iain Bethune
Genefer is free source code, under the MIT license.

Running on platform 'NVIDIA CUDA', device 'NVIDIA GeForce GTX 1070 Ti', vendor 'NVIDIA Corporation', version 'OpenCL 3.0 CUDA' and driver '466.77'.
19 computeUnits @ 1683MHz, memSize=8192MB, cacheSize=912kB, cacheLineSize=128B, localMemSize=48kB, maxWorkGroupSize=1024.
Supported transform implementations: ocl ocl2 ocl3 ocl4 ocl5

Command line: projects/www.primegrid.com/geneferocl_windows_3.3.3-2.exe -boinc -q 132841232^65536+1

Normal priority change succeeded.
Checking available transform implementations...
OCL transform is past its b limit.
OCL3 transform is past its b limit.
OCL4 transform is past its b limit.
OCL5 transform is past its b limit.
Using OCL2 transform
Starting initialization...
Initialization complete (0.103 seconds).
Testing 132841232^65536+1...
Estimated time for 132841232^65536+1 is 0:03:23
132841232^65536+1 is complete. (532371 digits) (err = 0.0000) (time = 0:03:22) 21:06:15
21:06:15 (13816): called boinc_finish(0)

</stderr_txt>
]]>

This particular iMac does not have Nvidia H/W, at least I don't think it does.

What is it telling me?
____________
Thanks,
Jim

Profile Michael GoetzProject donor
Volunteer moderator
Project administrator
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Joined: 21 Jan 10
Posts: 13655
ID: 53948
Credit: 294,326,706
RAC: 347,135
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 PrimesFound 2 primes in the 2021 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,132,712)Cullen LLR Turquoise: Earned 5,000,000 credits (5,038,114)ESP LLR Turquoise: Earned 5,000,000 credits (6,177,890)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (4,614,303)PPS LLR Sapphire: Earned 20,000,000 credits (20,751,038)PSP LLR Turquoise: Earned 5,000,000 credits (7,956,186)SoB LLR Sapphire: Earned 20,000,000 credits (36,067,618)SR5 LLR Jade: Earned 10,000,000 credits (10,007,110)SGS LLR Ruby: Earned 2,000,000 credits (3,742,794)TRP LLR Turquoise: Earned 5,000,000 credits (5,084,329)Woodall LLR Turquoise: Earned 5,000,000 credits (5,032,821)321 Sieve (suspended) Jade: Earned 10,000,000 credits (10,061,196)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 (22,885,121)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 (10,118,303)GFN Emerald: Earned 50,000,000 credits (78,031,938)WW Sapphire: Earned 20,000,000 credits (38,864,000)PSA Jade: Earned 10,000,000 credits (12,445,029)
Message 151543 - Posted: 16 Sep 2021 | 19:36:05 UTC - in response to Message 151540.

geneferocl 3.3.3-2 (Windows/OpenCL/32-bit)
...
Running on platform 'NVIDIA CUDA', device 'NVIDIA GeForce GTX 1070 Ti',
...
This particular iMac does not have Nvidia H/W, at least I don't think it does.

What is it telling me?


It's telling you that you're either looking at the wrong task or the wrong computer, because that task ran on a Windows computer with an Nvidia 1070 Ti GPU. :)
____________
My lucky number is 75898524288+1

Jim WilkinsProject donor
Send message
Joined: 4 Sep 07
Posts: 197
ID: 11784
Credit: 85,039,666
RAC: 33,332
321 LLR Ruby: Earned 2,000,000 credits (2,193,583)Cullen LLR Ruby: Earned 2,000,000 credits (2,543,202)ESP LLR Ruby: Earned 2,000,000 credits (3,407,901)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,838,486)PPS LLR Ruby: Earned 2,000,000 credits (2,164,428)PSP LLR Turquoise: Earned 5,000,000 credits (5,016,831)SoB LLR Turquoise: Earned 5,000,000 credits (5,380,169)SR5 LLR Ruby: Earned 2,000,000 credits (2,100,061)SGS LLR Ruby: Earned 2,000,000 credits (2,042,780)TRP LLR Ruby: Earned 2,000,000 credits (2,128,024)Woodall LLR Ruby: Earned 2,000,000 credits (2,810,079)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,010,304)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (200,004)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,001,945)PPS Sieve Sapphire: Earned 20,000,000 credits (32,541,318)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,010,599)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,124,676)AP 26/27 Turquoise: Earned 5,000,000 credits (5,488,888)GFN Turquoise: Earned 5,000,000 credits (8,036,348)
Message 151544 - Posted: 16 Sep 2021 | 20:36:23 UTC - in response to Message 151543.

Oops! Sorry. Let's try again.

<core_client_version>7.16.19</core_client_version>
<![CDATA[
<stderr_txt>
geneferocl 3.3.3-2 (Apple-x86/OpenCL/64-bit)

Copyright 2001-2018, Yves Gallot
Copyright 2009, Mark Rodenkirch, David Underbakke
Copyright 2010-2012, Shoichiro Yamada, Ken Brazier
Copyright 2011-2014, Michael Goetz, Ronald Schneider
Copyright 2011-2018, Iain Bethune
Genefer is free source code, under the MIT license.

Command line: geneferocl_macintel_3.3.3-2 -boinc -q 132841232^65536+1 --device 0

Normal priority change failed (needs superuser privileges.
Checking available transform implementations...
OCL transform is past its b limit.
OCL3 transform is past its b limit.
OCL4 transform is past its b limit.
OCL5 transform is past its b limit.
Using OCL2 transform
Running on platform 'Apple', device 'AMD Radeon Pro 5300 Compute Engine', vendor 'AMD', version 'OpenCL 1.2 ' and driver '1.2 (Aug 30 2021 06:56:17)'.
20 computeUnits @ 1650MHz, memSize=4080MB, cacheSize=0kB, cacheLineSize=0B, localMemSize=64kB, maxWorkGroupSize=256.
Starting initialization...
Initialization complete (0.067 seconds).
Testing 132841232^65536+1...
Estimated time for 132841232^65536+1 is 0:05:17
132841232^65536+1 is complete. (532371 digits) (err = 0.0000) (time = 0:05:14) 21:34:27
21:34:27 (27524): called boinc_finish

</stderr_txt>
]]>
____________
Thanks,
Jim

Profile Michael GoetzProject donor
Volunteer moderator
Project administrator
Avatar
Send message
Joined: 21 Jan 10
Posts: 13655
ID: 53948
Credit: 294,326,706
RAC: 347,135
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 PrimesFound 2 primes in the 2021 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,132,712)Cullen LLR Turquoise: Earned 5,000,000 credits (5,038,114)ESP LLR Turquoise: Earned 5,000,000 credits (6,177,890)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (4,614,303)PPS LLR Sapphire: Earned 20,000,000 credits (20,751,038)PSP LLR Turquoise: Earned 5,000,000 credits (7,956,186)SoB LLR Sapphire: Earned 20,000,000 credits (36,067,618)SR5 LLR Jade: Earned 10,000,000 credits (10,007,110)SGS LLR Ruby: Earned 2,000,000 credits (3,742,794)TRP LLR Turquoise: Earned 5,000,000 credits (5,084,329)Woodall LLR Turquoise: Earned 5,000,000 credits (5,032,821)321 Sieve (suspended) Jade: Earned 10,000,000 credits (10,061,196)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 (22,885,121)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 (10,118,303)GFN Emerald: Earned 50,000,000 credits (78,031,938)WW Sapphire: Earned 20,000,000 credits (38,864,000)PSA Jade: Earned 10,000,000 credits (12,445,029)
Message 151559 - Posted: 17 Sep 2021 | 19:22:38 UTC - in response to Message 151544.

Oops! Sorry. Let's try again.

<core_client_version>7.16.19</core_client_version>
<![CDATA[
<stderr_txt>
geneferocl 3.3.3-2 (Apple-x86/OpenCL/64-bit)

Copyright 2001-2018, Yves Gallot
Copyright 2009, Mark Rodenkirch, David Underbakke
Copyright 2010-2012, Shoichiro Yamada, Ken Brazier
Copyright 2011-2014, Michael Goetz, Ronald Schneider
Copyright 2011-2018, Iain Bethune
Genefer is free source code, under the MIT license.

Command line: geneferocl_macintel_3.3.3-2 -boinc -q 132841232^65536+1 --device 0

Normal priority change failed (needs superuser privileges.
Checking available transform implementations...
OCL transform is past its b limit.
OCL3 transform is past its b limit.
OCL4 transform is past its b limit.
OCL5 transform is past its b limit.
Using OCL2 transform
Running on platform 'Apple', device 'AMD Radeon Pro 5300 Compute Engine', vendor 'AMD', version 'OpenCL 1.2 ' and driver '1.2 (Aug 30 2021 06:56:17)'.
20 computeUnits @ 1650MHz, memSize=4080MB, cacheSize=0kB, cacheLineSize=0B, localMemSize=64kB, maxWorkGroupSize=256.
Starting initialization...
Initialization complete (0.067 seconds).
Testing 132841232^65536+1...
Estimated time for 132841232^65536+1 is 0:05:17
132841232^65536+1 is complete. (532371 digits) (err = 0.0000) (time = 0:05:14) 21:34:27
21:34:27 (27524): called boinc_finish

</stderr_txt>
]]>


The software didn't pick up any errors, so that means a calculation error occured, eventually producing the wrong result. It's a hardware error, most likely the GPU.
____________
My lucky number is 75898524288+1

Jim WilkinsProject donor
Send message
Joined: 4 Sep 07
Posts: 197
ID: 11784
Credit: 85,039,666
RAC: 33,332
321 LLR Ruby: Earned 2,000,000 credits (2,193,583)Cullen LLR Ruby: Earned 2,000,000 credits (2,543,202)ESP LLR Ruby: Earned 2,000,000 credits (3,407,901)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,838,486)PPS LLR Ruby: Earned 2,000,000 credits (2,164,428)PSP LLR Turquoise: Earned 5,000,000 credits (5,016,831)SoB LLR Turquoise: Earned 5,000,000 credits (5,380,169)SR5 LLR Ruby: Earned 2,000,000 credits (2,100,061)SGS LLR Ruby: Earned 2,000,000 credits (2,042,780)TRP LLR Ruby: Earned 2,000,000 credits (2,128,024)Woodall LLR Ruby: Earned 2,000,000 credits (2,810,079)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,010,304)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (200,004)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,001,945)PPS Sieve Sapphire: Earned 20,000,000 credits (32,541,318)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,010,599)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,124,676)AP 26/27 Turquoise: Earned 5,000,000 credits (5,488,888)GFN Turquoise: Earned 5,000,000 credits (8,036,348)
Message 151561 - Posted: 17 Sep 2021 | 21:22:56 UTC - in response to Message 151559.

Well, that's annoying! I very much appreciate the diagnosis. Guess I should go figure out how to diagnose a GPU problem. Since I have never seen this on my CPUs, I have to agree. This has happened twice on GFN-19 also. I wonder if the failure rate is proportional to the size of the GFN.
____________
Thanks,
Jim

Dr Who Fan
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Send message
Joined: 26 Sep 06
Posts: 122
ID: 3556
Credit: 16,930,440
RAC: 2,954
321 LLR Silver: Earned 100,000 credits (186,168)Cullen LLR Silver: Earned 100,000 credits (161,492)ESP LLR Silver: Earned 100,000 credits (102,526)Generalized Cullen/Woodall LLR Silver: Earned 100,000 credits (115,730)PPS LLR Amethyst: Earned 1,000,000 credits (1,431,003)PSP LLR Silver: Earned 100,000 credits (132,546)SoB LLR Silver: Earned 100,000 credits (433,700)SR5 LLR Silver: Earned 100,000 credits (114,016)SGS LLR Silver: Earned 100,000 credits (162,863)TRP LLR Silver: Earned 100,000 credits (100,020)Woodall LLR Silver: Earned 100,000 credits (103,446)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,006,012)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,740,001)PPS Sieve Turquoise: Earned 5,000,000 credits (5,066,749)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (119,708)TRP Sieve (suspended) Gold: Earned 500,000 credits (527,925)AP 26/27 Gold: Earned 500,000 credits (861,241)GFN Amethyst: Earned 1,000,000 credits (1,542,902)WW Amethyst: Earned 1,000,000 credits (1,008,000)
Message 151564 - Posted: 18 Sep 2021 | 7:43:00 UTC - in response to Message 151561.

Well, that's annoying! I very much appreciate the diagnosis. Guess I should go figure out how to diagnose a GPU problem. Since I have never seen this on my CPUs, I have to agree. This has happened twice on GFN-19 also. I wonder if the failure rate is proportional to the size of the GFN.

Check that your GPU is not overheating (can be caused by a build up of dust, pet hair, etc inside the PC); the GPU is not over clocked/in Turbo mode; GPU fan is not running. These all can cause the GPU to overheat and start causing errors.
____________

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