I have the same sort of problem: BSODs including PFN, Mem Management, IRQL not less or equal...
I'm running the A8N-Sli deluxe, 3200 Winnie, 2x512MB Patriot XBLK RAM (DDR400 @2225).
Any suggestions as to how to fix this? It's driving me absolutely insane!!
Using latest BIOS 1013, got a RAID...