Long story short, I got a new GPU, 650 TI, and it's been acting weird in various ways when playing games. I checked the temps with HWmonitor and its well within the safe range, and I've tried doing a clean install on the drivers. (I've heard beta is better to go with but I did not do that since the latest WHQL driver is newer than the last beta, so I assumed that was the way to go).
After some finangling on the forums it came up that it might be a PSU problem, though my PSU is 750w, well within the range needed for my rig (link to the psu).
I did some more looking around and saw that I could check my output voltage regulations. I'm not entirely sure how to do that, but the PSU says in it's specs: