The setup screen says it is foe nVidia GPUs, but what it really means? I'm running GTX260 and I set this number to 216 equal to number of CUDA cores. Is this correct setup? I do not run MW often because it slows down my graphics, is this option related to this? If so, what is the deal?

The setup screen says it is foe nVidia GPUs, but what it really means? I'm running GTX260 and I set this number to 216 equal to number of CUDA cores. Is this correct setup? I do not run MW often because it slows down my graphics, is this option related to this? If so, what is the deal?

If you're concerned about the graphics slowdown, you should use the BOINC setting to not use the GPU when the computer is in use (which I believe is the default).

This option doesn't actually exist. I was thinking of adding a less confusing option in future releases of the OpenCL application. 216 would not be correct; a better option would be x * 216 * 26 * 8 to maximize GPU utilization. Right now it indirectly tries to pick a good value for this so you don't need to think about it. 216 wouldn't work anyway since it isn't a multiple of 32, but it doesn't matter since it isn't a used setting.