Windows 7 BSOD when in game COD MW2 & MW3

So I've recently built myself a pc, and since have been having issues with a BSOD while in game in MW3 from anywhere between 10 minutes and a couple of hours of game play, and once in MW2 after a little bit (forgot the time period). I originally had my OS on my 2tb HDD, and since have put in place a 64gb SSD. My OS is currently running off that, and I originally thought it had fixed the problem, but 4 days later, playing moderate amounts of MW3 (2 hours a day) I experienced another BSOD after just over an hour of game play. I've read the how to ask for help with a BSOD problem and have the attachments for you, although I could not get the CPU-z Program to run properly for some reason, so I have tried to put those details below as well.

Asus P8Z77-M PRO P8Z77-M PRO.Z77 4xDDR3 3xPCI-E16 GBL SATA3 USB3.0 RA
OCZ 64G Vertex 4 Series SATA III 2.5" SSD
Western Digital WD20EZRX 3.5" CAVIAR GREEN, 2TB,INTELIPOWER,64MB,SATA III,
Corsair 16GB (2x8GB) CML16GX3M2A1600C10 DDR3 1600MHz CL10 LP Vengeance Unbuffered DIMM Memory with X
Intel Core i7 3770K/3.50GHz/8MB CACHE/LGA1155 Ivy Bridge
750w Power supply with fan
Gigabyte GTX 570 1280mb

Please note that my Graphics card is not new as I bought it secondhand from a mate. He had been using it as a secondary for a couple of months, but tested it before he gave it to me. It is about 12 months old.

I am about to run MSI afterburner to see how it goes, I'll comment whether or not I get a BSOD then.

- Nothing seems to come from MSI, I'm now running AIDA cpu stress test and will test RAM next

Thanks heaps



Ok so it appears I accidentally Overclocked (as to how, I don't have a clue), so I've fixed that an I'll see how it goes