I lose about 100 fps, and get a lot of stutters on CSGO just by simply turning on OBS. I just upgraded my PC, and all other games run like a dream with OBS on. It literally goes from being smooth and over 200 fps, to being stuttery and running about 50-70fps, just with OBS being on...not even streaming. All other games work perfectly.
Here's my specs
1070
i7 8700K (not OC'd yet)
16 gb DDR4
Asus Rog 144hz Gsync Monitor
Suggestons?
Do you notice your CPU/GPU/RAM usage change significantly when you open OBS?