ECM for CUDA GPUs in latest GMP-ECM ? - Page 49

storm5510 · 2023-02-22, 01:39

Quote:

Originally Posted by kriesel

NVIDIA quadro k620, gpuowl v6.11-382, gpu-Z v2.52.0, indicated gpu load 100%.
Most recent NVIDIA consumer GPUs have poor DP performance (PRP, LL, P-1) relative to SP performance (TF), while Teslas and AMD typically have decent DP performance ratios. I almost never use RTX2080 or GTX 1650 for anything other than TF because of the 32:1 SP/DP ratio.

Well, a lot of what is above sails over my head. I will take your word for it. I go by what I see here...

VBCurtis · 2023-02-26, 03:23

A math-liking friend just picked up a 4090. If I were to talk him into GPU-ECM runs, how many curves will it test per run?

SethTro · 2023-02-26, 07:53

Per https://www.mersenneforum.org/showpo...&postcount=109

Number of curves is strongly related to number of shader units; 1x, 2x, or 1/2x is generally optimal (you can measure with ./gpu_throughput_test.sh). My 1080ti (3584 shaders) prefers 1792 curves (1 curve / 2 shaders). My 970 (1664 shaders) prefers 832 curves.

I would expect the 4090 with 16384 shaders to be best with 8192 or 16384 curves at the same time.

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2023-02-26, 03:23	#530
VBCurtis "Curtis" Feb 2005 Riverside, CA 2×2,897 Posts	A math-liking friend just picked up a 4090. If I were to talk him into GPU-ECM runs, how many curves will it test per run?

2023-02-26, 07:53	#531
SethTro "Seth" Apr 2019 17×29 Posts	Per https://www.mersenneforum.org/showpo...&postcount=109 Number of curves is strongly related to number of shader units; 1x, 2x, or 1/2x is generally optimal (you can measure with ./gpu_throughput_test.sh). My 1080ti (3584 shaders) prefers 1792 curves (1 curve / 2 shaders). My 970 (1664 shaders) prefers 832 curves. I would expect the 4090 with 16384 shaders to be best with 8192 or 16384 curves at the same time.