my gpuminer slows down when I run cpuminer. Only by about 3% but its annoying. I need my GPU to run on cpu thread #20 (which is actually thread #19 since thread #0 is actually the first thread)...

I don't know the hex value for core 20 in windows (which is actually 19 since 0 is the first "core"....Anyone know the hex value for the last core on a 20 thread system? "Core 19"??