EP45-UD3P Computer problems

Hello,

I just put a computer together a few days ago. For some reason during a installation of Windows XP the computer with blue screen and than restart immediately.

The computer DID allow me to previously boot into Windows XP (But I was using an old HD with an old Windows install from another computer setup, so the computer just lagged upon booting and sat on the desktop).

So I restarted the PC, formatted the drive and started a Windows XP installation.

It'll format and copy the Windows setup files fine, but once it restarts and boots to install XP, it will blue screen and than restart. It doesn't do it at a specific time, it will randomly do it. Also to note some times during the install it would have an error pop up asking to locate the i386 folder for the installation. It will also stall and sit at "39 minutes remaining" on the time left, and sit on that for quite a bit. Once it does finally go past that it usually blue screens on another step.

I thought it was the hard drive at first, but I was able to install Windows XP on another computer without a hitch. It also wasn't the Windows XP disk because it had installed perfectly on another computer.

I was thinking it could be the memory, but I ran memtest on it and it seemed to pass with no errors..

Intel E8400
Gigabyte EP45-UD3P
ATi HD4850 X2 2GB
Corsair Dominator 4gb (2x2gb) 1066mhz
Seagate Barracuda 7200rpm 500gb drive
Corsair TX750W Power Supply

Is there any way I can diagnose it any further without having an additional computer/more parts? I have already set the ram at 2.1v like suggested by others, and it still has the issue. Could it possibly be the video card? (It does run pretty hot, but I heard that is normal for the X2 HD4850). Could it possibly be the Blu-Ray SATA drive I put in? I also tried putting the memory in another DIMM slot, but it still happens.

I am not able to see the error of the BSOD because it restarts immediately.