Finally found the culprit of my overclocking. XMP enabled has been causing frequent BSOD/screen freezes during stability testing.
Now my question is- could it be the ram? I have 2x4gb corsair vengeance 1600mhz that I purchased used off eBay.
I'm going to conduct a memtest (which I should have already done) this weekend.
What was ram frequency when you had BSOD's?