My system:
Mobo: MSI Z77-S01
CPU: Intel Core i5 3570K @4.2 GHz
CPU Cooler: Corsair Hydro H100
RAM: 8GB Corsair Vengeance DDR3 1600
GPU: MSI Nvidia GTX680 Lightning 2GB @1.3 GHz (driver 320.49)
GPU Cooler: Twin Frozr II
SSD: Corsair Force 3
OS: Win 7/64
CPU overclocked using MSI Afterburner. OC is stable and there are no heat issues (both CPU and GPU temps monitored).
DxDiag.txt attached.