I've posted here before and I'm still having the same problem.
Even after buying an Alienware Alpha 1.
Every game has 'hitchs' as well as not keeping consistent frame timing (each second the 60 or whatever frames are all at weirdly different speed. I had an 8350/7970ge from about may to november last year running beautifully. Now, many times a frame will take a while and the next one will be really fast, etc.) To the point of being ridiculously unplayable
This problem has persisted through all hardware changes, OS reinstalls/changes (win7/8.1), Trying in different locations, lowest settings/resolutions possible (840x640 or whatever it is), multiple systems I've put together, amd cpu/radeon gpu vs intel cpu/nvidia gpu and now even a pre-built.
I've done all the things people suggested before they suggested it (New drivers, check temps, etc.)
I've literally given up multiple times because I've probably spent $2000 bucks now and can't play games on anything without damn stuttering.
I literally feel like me touching a computer breaks it.