I installed a new nVidia video card and was getting terrible results with benchmarks or trying to play video games. After installing a GPU monitor, I found out the reason for the poor GPU performance was because the GPU usage was at 98% idling at the desktop. Something is utilizing all of my GPU with no programs running. Here's the strange part; when I open the Task Manager to check what might be using the GPU, the GPU usage drops to zero! The same thing happens when I open Process Explorer(procexp.exe) to check what processes are running; GPU usage goes from 98% to zero.
I don't think it's a hardware problem, the video card runs fine and has the latest drivers. The fact that any program needed to see what the problem might be causes the GPU usage to stop makes me suspicious. I mean how can opening programs like Task Manager and Process Explorer have such a dramatic effect on GPU usage? I was thinking maybe I had some kind of data or bitcoin mining malware. I run ESET NOD32 all the time and in depth virus scans show nothing, same thing for Malwarebytes.
At this point, I'm kind of grasping at straws. I don't know if this is the result of a virus or malware, bad software or what. Have any of you ever heard of anything like this?