Driver IRQL not less or eual BSOD on new system

Hello guys, I'm green to this site and to many aspects of system building, especially since it had been so long since I had endeavored to build one.

I've had this new system up and running for about a week now after returning a faulty PSU and having my mobo tested due to missing RAM. It's worked relatively well except for these bluescreens I keep get about 85% of the time when i try to open a game (World of Warcraft is the only one I have installed so far).

Its a "Driver IRQL not less or equal" bsod, and it seems to be telling me the problem lies within a file called cmos108.sys.

I've tried to google for others with the exact same problem but haven't found anything yet. My system specs are:

GPU - Asus GeForce GTX285
PSU - Corsair 650W TX
HDD - WD WD5000AAKS 500GB SATA II
CPU - Intel Core i7 920 2.66GHz
RAM - 6GB Corsair TR3X6G1600C9
MB - Asus P6T DELUXE

I am currently running Windows XP x64 Corporate Edition.

So far I've tried the following steps to solve the problem:

I formated the system completely, both partitions.
Tried uninstalling nvidia drivers and installing an earlier release.
Ran Memtest for 13 hours with approx. 2500% coverage, 0 errors.
Since I am also experiencing issues with missing RAM, I flashed my BIOS which would, according to the Asus support website, increase memory compatibility.

Any ideas would be heartily welcome, this system has been a proper pain in the a** so far and I'm really wanting it to start working as intended. Any more questions I can answer about the nature of the problems please ask, I could write down the whole BSOD with addresses and all if that would help.

Thanks in advance,

Stian

Perhaps I'm just being a proper scrub, but i can't find any of these on msinfo. I'll keep looking!

IRQL NOT LESS OR EQUAL usually is a driver conflict, although bad RAM can also cause the error. Run memtest86 to rule out the bad RAM, and if it passes, you know its probably a driver conflict.