Don't think this is a PC thing tbh, but rather something with the game. Running an i7 3770k, 16gb ram & 2 x 680's in SLI and it can drop horribly sometimes.
Something in the game engine isn't optimized properly.
I'm running a i7-4771, 32GB RAM, R9 290 OC, SSD and also get random slow downs from time to time.
