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The full CPU core running to fed the GPU is only because Nvidia designed the driver this way, on AMD GPUs the driver uses only 5-20% of one CPU core. CPU is not really doing something all the time but polling the GPU "Do you need new data?" and GPU answers "No" until it really needs new data. This is also the reason why it doesn't matter if your CPU runs at 2.5Ghz or 4.5Ghz for GPU feeding.Aurum wrote:GPUs may be underutilized because unimportant things are constantly interrupting CPUs set to too low a priority and they are not keeping the GPUs fully fed.
foldy wrote:I tried on my non hyperthreading CPU running a software on all cores and GPU folding TPF goes up from 1.5 min to 2 min on nvidia or 3min to 4 min on AMD, this is 33%. If I set my software to low priority and FahCore_21.exe to high priority then the miracle happens and nvidia is down to 1.5 min again while AMD stays on high 4 min.
If a software on a hyperthreading CPU uses all threads with higher priority than FahCore_21.exe, does that slow down GPU folding? (I guess so)
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