Comment # 3
on bug 99967
from Christoph Haag
Some more experimentation: The SaschaWillems Vulkan examples that cause a lot of gpu load (like computecullandlod) make the GPU run at the highest performance level. McNoppers OpenGL Example30 (raytracing with compute shaders) does the same. But Furmark still only makes the GPU run at 600-900 MHz. So most likely the cause is NOT in X or the general handling of one of the graphics APIs and most likely it is not a general power supply issue. It could be that it only happens when certain hardware parts of the GPU are under high load, or are not under high load. On IRC some people tried furmark and could not reproduce this behavior. (The user Remco with a factory overclocked XFX RX 480 too, though a different model than mine). This is good news for the driver developers. This is not so good news for me because now I have to find out whether it's bad hardware (mainboard, GPU?) on my part or something in my software configuration.
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