Random BSODs

Two more crashes with verifier enabled. Unfortunately they were both restarts and did not generate BSODs. Could an inadequate PSU be the cause? My current one is 380w.

Installed a new PSU. Reinstalled windows. Updated to service pack 1 and almost an immediate bsod. Attached the details. I've received different instructions for using verifier. Do I need Standard settings, Force pending I/O requests, and IRP Logging all ticked?

Installed this hotfix Computer randomly stops responding because of a deadlock situation in Windows Server 2008 R2 or in Windows 7. If nothing works I'm going to give the 32bit version of w7 a try.

I've already run memtest+ for 12 passes. No BSODs since applying this hotfix though, including when gaming. Cautious optimism that it fixed the issue...

Another BSOD. Occured when in-game. Nothing new, error code 3b.

Ran Furmark for 20 minutes with the settings suggested. Temperatures never exceeded 58 Celsius and I saw now visual errors. In light of this (and the replaced PSU & successful memory checks) I rolled back the bios version to the last stable build and am yet to experience a blue screen. Fingers crossed...