POEM questions

[pinhodecarlos]

1) Can someone enlighten me how much work is done on a GPU wu ( POEM++ OpenCL version) when compared to the CPU ones (POEM++)? I would like a response like GPU wu is X times larger than CPU wu or 1 GPU wu is equal to X CPU wu. X is the variable.

2) How many cores are necessary to feed a nvidia GTX 680 and an ATI HD 7970 to keep them at least at ~95 %? How many GPU wu's must run in parallel to reach 95 % of GPU usage?

3) Timings for a default GTX 680 and an ATI HD 7970 running a POEM++ OpenCL wu.

Thank you in advance,

Carlos

[Fire$torm]

Hi Carlos,

I cannot give you numbers but GPU work gives much better credit/day then CPU work.

For my GTX 460, one thread per GPU wu is required. IIRC ATI/AMD 5xxx series GPUs and above only need 1/2 thread per GPU wu if you use CCC 12.11 driver.

[John P. Myers]

I was reading on their forum awhile back that they figure a GPU WU to be 30x more work than a CPU WU

[pinhodecarlos]

Thank you both.