I've had my computer for over a year and I didn't really use it much for the first 6 months. However 6 months ago I got back into PC gaming and discovered that my computer would occasionally crash during game play. The crash is different depending on what game I am playing however for the majority of the games my computer will freeze and in order to exit the game I will have to close it in task manager. I have tried replacing my graphics card, updating every kind of driver you can think of, downgrading to older drivers, re-installing windows, testing different slots for ram and my graphics card and testing different hard drives. A game will crash once per hour on average though it can differ. I'm really fed up with this and any help would be much appreciated. Thanks.
Motherboard - Asrock z77 Extreme4
Processor - Intel i5 3570k
GPU - Nvidia GTX 670
RAM - Corsair Vengeance 8GB (2x4GB) DDR3
PSU - Corsair CX600 V2 600 Watt 80
Crucial 64GB ssd m4
WD Blue 1TB
Windows 7 Home Premium 64-bit
Motherboard - Asrock z77 Extreme4
Processor - Intel i5 3570k
GPU - Nvidia GTX 670
RAM - Corsair Vengeance 8GB (2x4GB) DDR3
PSU - Corsair CX600 V2 600 Watt 80
Crucial 64GB ssd m4
WD Blue 1TB
Windows 7 Home Premium 64-bit