texnonik
Well upgrade drivers . Reconnect ram video card ( is you ram connected correctly ? ) check hard drives plugs . Reconnect all wires . Also when it happens check cpu and gpu load and temperature .
When you changed termopasta on cpu last time ?
Well, I'll try all that, yes only happens with teeworlds and when it happens I can tell my PC is doing a lot more work and I get even more fps, like +300, but it's so laggy, is like im playing with vsync on