PC Processors

[Potatomaker5]

I have a Ryzen 7 5700G, NVIDIA GTX 1070, and an ASUS 180hz monitor. Whenever my CPU is under mild/moderate load of at least 20-30% CPU usage (e.g., moving my mouse in-game, scrolling through Discord, having a GIF playing in the background, etc.) any moving objects on my screen will have jittering/ghosting. It's really obvious in something like UFO Test, but I can't seem to record it as it doesn't show up on my 60fps phone camera. It's almost like the refresh rate/fps has sudden drops, except UFO Test doesn't register any stuttering or fps drops (fps remains constant in-game too). Weird thing is enabling graphics acceleration in Google Chrome solves this issue for UFO Test specifically, making me think it's a CPU issue. This is regardless of whether the monitor is plugged into the onboard or GPU display output. 

All my CPU/GPU/motherboard drivers are up to date and I've tried enabling/disabling integrated graphics, overdrive, freesync, XMP-profile, different cables (HDMI/DisplayPort), different refresh rates, lowering mouse polling rate, etc. Temps stay normal (40-50C). Any ideas? 

[Potatomaker5 · Accepted solution]

Ok so it turns out the same thing happens on other CPUs/PCs when running UFO Test (e.g., tried on i7-12700k), and enabling graphics acceleration fixes it on those PCs too.

I also think the UFO Test issue is different from the stuttering I experienced in-game. I don't know why I didn't think of it sooner, but my monitor probably overclocks to reach 180hz. Turning the refresh rate down to 144hz/165hz pretty much fixes the stuttering. This explains why I saw stuttering but not any frame rate drops.