Stuttering at 60 fps

my game seems to have micro stutters without the fps going down, i have tried vsync on/off, max fps on/off, 64 and 32 bit client. may be going in cycles but cant tell, doesnt seem to be dependent on enemies on screen.
gtx 970, i5 4690k, 8gb RAM

I have the same error. The game just completely collapses at times as if you only have 2-3 FPS but the display shows 150-190 without any problems.

My system is also visibly bored.
i7 8700K
RTX 3090
16 GB ram
M2 SSD