I've been getting fairly regular BSOD's accompanied with buzzing when gaming, "IRQL not less or equal" deals. It generally happens pretty quickly, and I have watched temperatures under stress with this, so I'm not thinking it's a temp-related issue. I have run memtest for many hours which didn't turn up any issues.
Much more rarely, I have woken up in the morning to see that the system had rebooted from a BSOD error, but 95% of the times it comes under fairly heavy gaming.
dumps attached as requested, thanks so much for the help!
Win7x64Pro, Asus/Intel mobo, Q6600, BFG GTX265, Audigy 2 Value.