Extreme Stutter and FPS drop on PC

I get 1 or 2 severe FPS drops in games as well. My specs:
i7 4790k
R9 290 watercooled and overclocked(not throttling, already checked).
Asus Hero VII

The motherboard is the same and that is it. I assume it is just a game bug, but I would not put it past the motherboard we share. I am sure you are aware of the instability and quirks of this motherboard. I recently had to update the bios to fix the system clock issue, and this is when the random stuttering appeared, but also the patch happened at the same time, so who knows. I also get occational massive slowdowns in other games, and only after that bios update, so I am thinking it might be this bug filled motherboard

I usually get them once every 30 minutes, and the performance begins degrading over the course of 10 seconds, at which time it totally stalls for a second, then goes back to normal. It stalls just long enough for me to fear the system locked before returning to normal. All my temps are well below throttling(65ish for cpu, gpu never goes over 55c).

Edit: I am running Windows 8.