My computer with a 7600k in it completed this task using all four threads in 44000 seconds: https://www.primegrid.com/result.php?resultid=1032922944
My computer with a 9700k in it completed this task using four threads (running another task on the other for threads) in 82000 seconds: https://www.primegrid.com/result.php?resultid=1032483711
I would have expected the 9700k to be able to complete the task slightly faster than the 7600k, but that clearly did not happen here. Both are running at factory settings, I don't have either overclocked. The only major difference between the two computers is the fact that the 7600k has a GPU in it that is running AP27, while the 9700k does not have a graphics card (yet).
Any ideas on why the 7600k is able to complete tasks so much faster than the 9700k? I doubt this much of a difference could be explained by differences in RAM timings...