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I'm referring to the GTX 1080 running FP16 at 1/64th the rate of FP32: https://www.anandtech.com/show/10325/the-nvidia-geforce-gtx-1080-and-1070-founders-editio

I'm referring to the GTX 1080 running FP16 at 1/64th the rate of FP32: https://www.anandtech.com/show/10325/the-nvidia-geforce-gtx-1080-and-1070-founders-edition-review/5 https://www.anandtech.com/show/10325/the-nvidia-geforce-gtx-... "GeForce GTX 1080, on the other hand, is not faster at FP16. In fact it’s downright slow. For their consumer cards, NVIDIA has severely limited FP16 CUDA performance. GTX 1080’s FP16 instruction rate is 1/128th its FP32 instruction rate, or after you factor in vec2 packing, the resulting theoretical performance (in FLOPs) is 1/64th the FP32 rate, or about 138 GFLOPs."

shaklee3 9y ago
Right, and I'm saying it uses the GP104 asic, which has that disabled so that other features can be enabled (higher clocks, for example). I don't think you can find and example where the Tesla shares the same chip as the GeForce and something like fp16 is different. I'm sure they do a lot of shady things, but I believe part of this is just chip design tradeoffs.
- shaklee3 9y ago
  Just to prove the point, the Tesla p40 has the same chip as the GeForce you site, and it too has slower fp16. This is for a $5k card .