My PC :
i5 2500k
corsair 1050W
EVGA 680 GTX
4x4GB DDR3 G.Skill
Asus P8P67 PRO REV3
Corsair M4
case – Corsair 600T
My PC was randomly locking up on me whenever it felt like. It was generally under 24 hours of being booted. I was replacing stuff left and right, and on a whim, tried just unplugging the USB3 Bracket, and it fixed it. I have had my PC on for over 3 weeks, NO lockups. Check that bracket, apparently it’s shit, at least in my case it was!