BSOD when playing Battlefield 3 and TERA

Hi I'm getting random BSODs when I'm playing Battlefield 3, and most recently the TERA beta. This never happens with other games nor does it happen with other applications.
I'll paste the latest error report and add the minidump related to that crash.
Hopefully someone can help me figure out the problem :)
Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1044

Additional information about the problem:
BCCode: a
BCP1: 00000000000000FF
BCP2: 0000000000000002
BCP3: 0000000000000000
BCP4: FFFFF8000308EB40
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1
 
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