BSOD playing battlefield 3, Fault bucket , type 0

When playing battlefield 3, and sometimes in other games like SC2 and MW3 it will either crash the computer, crash to desktop or BSOD.

This is the data pulled from the event viewer:

Fault bucket , type 0
Event Name: BlueScreen
Response: Not available
Cab Id: 0

Problem signature:
P1:
P2:
P3:
P4:
P5:
P6:
P7:
P8:
P9:
P10:

Attached files:
C:\Windows\Minidump\121111-24694-01.dmp
C:\Users\Hugh\AppData\Local\Temp\WER-51183-0.sysdata.xml

These files may be available here:
C:\Users\Hugh\AppData\Local\Microsoft\Windows\WER\ReportArchive\Kernel_0_0_cab_08d980c3

Analysis symbol:
Rechecking for solution: 0
Report Id: 121111-24694-01
Report Status: 0

I have just upgraded my computer to with:
Asrock Fatal1ty Z68 professional gen3
G.skill ripjaws X F3 2133 8gig
2 X ASUS Radeon HD6950 DirectCU II 1GB in crossfire
i5 2500k
850w antec pro psu

Windows 7 home premium 64bit
OEM
Purchased the mobo, cpu and RAM about 2 weeks ago, and the two gpu's 2 days ago with the psu.

I think the crashes/BSOD started when i installed the cpu, mobo and ram, but where less frequent than they are now with my new gpus

I bought a new HDD and installed windows from scratch 2 days ago when i put in the GPUs

Any help would be much appreciated

crashed with a different faulting module. Faulting module name: atidxx32.dll, version: 8.17.10.401, time stamp: 0x4ea768a3. Does it mean its related to my graphics maybe?

I have run msi kombustor and after a few minutes it crashes and i get a pop up "amd driver stopped responding and has recovered" I also noticed this when skyrim crashed and i was able to get to my desktop. One gpu seems to run from around 75-85 under load whilst the other is about 10 degrees cooler.

I also downloaded a BSOD viewer and it states that my previous BSOD was due caused by driver: dxgkrnl.sys