Don't understand this mfaktc behavior
 

I don't understand why this is happening: I am running v0.17-Win 64 bit mfaktc. SievePrimesAdjust is set to 1 and always quickly adjusts itself to 5000. I am factoring in the range M57000000. The average rate stays nearly constant at 168M/s and the wait time is around 135us.

I am using a GTX 580 and the GPU usage is a constant 41% (mfaktc is the only significant GPU user). mfaktc is using 17% CPU (Core-i7 970 six-core hyperthreading off).

Prime95 is also running using the remainder of the CPU capacity. If I stop Prime95, the mfaktc throughput DROPS to 102M/s and the wait time drops to 85us. The GPU usage falls to 25%.

How is it possible that mfaktc is performing better when there is a heavy Prime95 load on the system?

Please check whether the CPU downclocks (EIST aka Speedstep) when only mfaktc is running or not.

Oliver

OK that's it — downclocked from 3570 MHz to 2040 MHz when I stopped Prime95. Thanks