try to set HZ to 90 from windows and see if game had the same problem
Have you been able to swap any parts with your brother's pc? perhaps SSD or GPU would be useful to know.
Today I tried a new CPU, plugged my PC and Monitor into a different room, with nothing other than the display port and mouse plugged in...offline...still same issue.
I feel I've tried everything except a new GPU now :|
EDIT - Trying it TF2....if I open up my monitor OSD, when I see the monitor hz change and shows a different fps than the counter, this is when I can see it stuttering. So it seems to be a monitor/gpu desync of some kind.
Same with Dota. If I use RTSS and cap it at 120fps, I can see my monitor OSD hover around 120fps and looks smooth. If I use the in game fps cap and set it to anything, I can see it bouncing between 144hz, 75hz..and everything in between...which is when I can see the stuttering, but the fps counter still says what I capped it to. Even if I disable adaptive sync on the monitor, and can see that the monitor hz isn't fluctuating, the issue is still seen.
If I set RTSS limiter to 90fps, looks super smooth with no frametime changes. If I set it to say 160fps...no frametime changes at all, but looks horrendous. Presumably because the monitor/gpu aren't syncing?
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