[trebleshot]

It could also be the memory slots on your motherboard. And unfortunately, that doesn't always show up on diagnostic tests. Also, that IRQ error you got points to a hardware/firmware issue. I would definitely recommend running a memtest on the memory if you haven't already.

Also, what kind of memory are we dealing with? Is it SDRAM, DDR, DDR2, DDR3, or RAMBUS? And have you recently upgraded or changed any of the hardware before the BSOD started showing up?