BSOD, playing games. Assistance required.

Hi, I keep getting blue screened when ever I play high end games on full graphics.

Here's a report and I've also attached info from Windows regarding the issue:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 2057

Additional information about the problem:
BCCode: a
BCP1: FFFFF80004BA2FC0
BCP2: 0000000000000002
BCP3: 0000000000000000
BCP4: FFFFF800030E5900
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

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UPDATE:
I thought it relevant that you know I just installed a new 8150 8Core AMD FX CPU.

Installation went fine and my motherboard is capable of handling such a CPU.

My system specs:
Nvidia Geforce GTX 570
AMD FX-8150 8-Core CPU 3.60GHz
8 Gig 1333MHz Transcend RAM
and my mother board is a Gigabyte GA-870A-USB3 AMD 870 DDR3 ATX Motherboard - Socket AM3 GIGABYTE - Motherboard - Socket AM3+ - GA-870A-USB3 (rev. 3.1)

Did you reinstall WIn7 after changing the CPU? Follow these same steps to Clean Reinstall - Factory OEM Windows 7.

Update your drivers to see if that helps. Watch for newer via optional Updates after enabling to Automatically get recommended drivers and updates for your hardware .'

Here are additional Troubleshooting Steps for Windows 7 - Windows 7 Forums

If necessary run Driver Verifier to identify issues with Windows drivers for advanced users .

Hi,
Tried to run 'Verifier' but it requested that I allow the PC to restart.

So I shut down and restarted.
I noticed that the loading of the OS was taking some time and when I was actually able to log in it was running slow.

Once I'd logged in it was taking a lot longer than usual to load and in about 15seconds it Blue screened.
I am not unable to use Windows7 because it keeps blue screening.

I'm on the same pc but that's because I have windows XP installed on my secondary HDD in case my main HDD died or if there was a problem with Windows7.
Looks like I made the right call huh? :P

Anyway, will re-install windows7 and see just what the hell is going on. Also in contact with AMD because I had absolutely NO issues until I installed the new CPU.

This is a confusing one for me, I've checked my PSU and it's fine. (Corsair GS700 700w)

Stick closely with the steps in Clean Reinstall - Factory OEM Windows 7 which represent what works best in tens of thousands of reinstalls we've helped with here.

In particular drivers are handled differently in Win7 than XP, so read and follow the driver steps closely.