resume BOINC GPU crunching -> the card immediately switches to "P2" and the memory clock speed drops launch a benchmark like Heaven in windowed mode, halt BOINC GPU computations -> "P0" and full memory clocks are reported
Inspector also shows the performance state. However, tools like GPU-Z and nVidia Inspector show the clock speed being lower. This speed is also what's reported by the Einstein and GPU-Grid apps. Running regular 3D loads the card switches into "P0" and runs the memory at 1.75 / 3.5 / 7.0 GHz. This is difficult, because at first glance everything seem OK. I expect GTX980 with more shaders to feed to be affected even more, and Einstein with generally higher bandwidth demand to be affected even more. This is meant for some less-demanding load and limits GPU memory clocks to 1.5 / 3.0 / 6.0 GHz on GM204 cards, depending on how you want to count DDR clock speeds.Īt GPU-Grid the memory controller load is ~50% with my GTX970, while loads >30% are known to reduce performance measureably. I have also seen it reported from the Bitcoin guys, but am not aware of any solution yet.Īs soon as a CUDA or OpenCL task is started, the card is limited to "P2" as the highest performance state. I stumbled upon a problem with my Galax GTX970 running GPU-Grid, which seems to affect all cards and all GP-GPU crunching, i.e.
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