GTX 980 PPD

that tracks with my GTX970.... sort of. I have mine OCed to a max freq when boosting of 1524. On 8000 point core 17s, I am pulling down just over 300KPPD. With core 18s, I get just under 80KPPD, and Core 15s are also right around 80KPPD. So when it is 15 or 18, my R9 270Xs are just above my GTX970, but with the right WU, that 970 is phenomenal.

Heat wise, the 15s and 18s work the card at almost 100 of the power rating, and are limiting my OC. The core 17s, load the card to 67% of the power limit, and I have more OCing headroom. I am using a MSI 970, and the cooler is more than up to the heat load. Even fully loaded with a core 18, I do not break 75C.

I assume that Stanford is working out a way to permanently nerf the 970 and 980.

John
 
Unfortunately the ball is in NVIDIA's court on this one. There is a major bug in the OpenCL driver for Maxwell - NVIDIA has known about it since April. Core 18 has a software band-aid so it will run successfully, but obviously performance is very poor. For Core 17 there is no band-aid, but only Project 9201 doesn't use the defective feature.

There are two ways this can be fixed:

1.) NVIDIA fixes the OpenCL driver
2.) NVIDIA creates a CUDA Just-In-Time compiler (required by Core 17, 18, and 19) and F@h creates CUDA Cores (for 17, 18, and 19).

In the meantime, by running Linux you can ensure you get Core 17 9201 WUs or nothing. My stock GTX980 gets about 330k PPD by doing that.
 
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