I loaded up CSGO a moment ago to play some today, and noticed my FPS was like 50-60, compared to my normal FPS of an easily-achieveable 250.

... Well, it turns out I forgot to pause my Folding@home client so my GPU was basically being choked with bandwidth because CSGO and my F@H client were fighting over who gets resources.

I peanut-brained so hard just now.