frame drop

Hey guys I just recently bought a pc and thought about getting into streaming. Everything I've read so far says I should be able to stream relatively easily on my machine but for some reason I have absolutely horrible drops in performance when I stream. Just looking for suggestions or answers on...

When I record or even sometimes when Im not recording, the preview screen and or the final recording drop to a visible 30fps. The game stays at 60fps. This happens all the time at random times. sometimes its as soon as i hit record, sometimes its when obs is just open and not recording, it...