Changed hardware; now Windows has crashed. HELP!

[Gatorsurg]

Installed a water-cooling system on the rig yesterday. I have:
ASUS A8n-SLi motherboard
2GB Corsair RAM
NVidia GeForce 8800GTS g92
Soundblaster Xi
Seagate Barracuda 250GB HDD

Everything worked like a charm on install and for 2 hours thereafter.
Nothing got hot; no coolant leak anywhere. Played COD 4 on max settings.

Then the blue screen of death. Re-booted, and windows would not boot. Bios
recognized all the hardware, but Windows froze early in the boot process.
Took out the HDD, tested it on another computer, and it worked fine; no
problems with Windows. Have tried to re-boot from the Windows CD multiple
times. It starts up, goes through the screen where it examines the sytem,
then you see all those startup files and drivers loading, then it says
"Starting Windows" at the bottom. Then the blue screen of death appears
again and says:

Driver_IRQL_NOT.LESS_OR_EQUAL

At the bottom of the screen it says:

Atapi.sys - Address F72E85ED Base at F72E 3000 Date Stamp 41107B4D

Anybody have any ideas?

 

[Gatorsurg]

Never mind! Took out 1 Gig of the RAM and re-booted. Everything started up
OK. Re-installed the Ram and booted successfully again. Now I just need to
re-install sound card, etc., and all will be well.