All right, I'm nearing my wits end with this board. First, my setup:
Asus P5N-E SLI with the latest BIOS
Intel Core 2 Duo 6850
2 GB Corsair XMS2 (Twin2X2048-6400C4), as listed on the memory QVL for the board
2 SATA HDD - 1 x 73 GB Raptor (Boot), 1 x 400 GB Seagate (Data)
Pioneer 18x SATA DVD Drive
eVGA 8600 GTS Video Card
All of it lives in an Antec P180 case, powered by an Antec SmartPower 450W PS.
At first, I had 2 GB of Crucial DDR2-800 in the box (which wasn't on the QVL). I had nothing but issues with it, especially when trying to run in dual-channel mode. I pulled that RAM out this morning and swapped it with the memory that is currently installed.
With this RAM installed, I freeze as soon as I log into Windows (Vista Ultimate, x86) or shortly thereafter. The install is fully patched, with all the latest drivers for the assortment of hardware installed, and not much else (besides World of Warcrack). I've tried cranking up the memory voltage to 2.1 (as that's what it says on the information sheet for the RAM, posted on the Corsair website). I'm reinstalling Vista now, hoping that it's something with my install - anyone have any recommendations?