Random BSODs. Replaced hardware. Is it the motherboard or CPU?

Hi there,
I never had such a problem before... I'm getting strange, random BSODs. Each time something else - sometimes after a few hours, sometimes minutes...

It's an old PC i use as a file server / media center:
ASUS P5ND2-SLI Deluxe

Some examples:
0x9c
0xfc
0x7e
0x7f
0x24
0xd1
etc.

So I know these errors and solved similar problems before. I have access to a lab with hardware so I could swap etc.

I know it's a hardware problem and not a driver etc.: I get the BSODs in Safe mode and even when I start from the XP CD or the UBCD...

Turned BIOS to its default.

At first I thought it was RAM or PSU. Replaced them (even though the RAM tested good over 7 times with memtest - in another PC).
Then I thought that it might be the GPU memory, and replace the card as well...

It's not a defective HDD cause it happens even without the HDD (when booting from a CD). It's not the DVD drive... also, swapped the cables (SATA and IDE).

How can I test and analyst the CPU, L2 cache and the motherboard?

ANY tips will be greatly appreciated! Thanks in advance!!!
 
Looking at all those error codes and what you have already tried it seems very likely that your CPU or motherboard is on the way out. All I can suggest is that you swap the CPU for a known good one and if the problems persist it is very likely the motherboard.

The only test I know of for CPU's is Prime95 but this is more for checking overclocking stability. It will drive the CPU to 100% and report any errors. You would need hardware to test the mobo.

http://files.extremeoverclocking.com/file.php?f=103
 
Thanks.

Seems like it's the motherboard... I'm looking at this one as a replacement:

GA-P43-ES3G

What do you thing about it?

Again, this is not my main computer. It's pretty cheap, has 5 PCI slots (I need at least 3 for tv card etc.) and I can install a more modern CPU in it.

Also, how can I keep the HDD with the new motherboard/cpu? I can't uninstall all the old motherboard related stuff because it keeps crashing - now more than before . . . I can't even boot.

Thanks.
 
I am sure the motherboard you have chosen will be fine.

As the crashing is being caused by the mobo there should not be a problem when you connect the hard drive to the new one. But, you will need to run a Repair install to get the OS to work with the new motherboad and replace all the drivers. It is, in most casses, advisable to do a clean install. You will have to re register the OS with microsoft as this will be seen as a new PC and you cannot have it registered to more than one machine.
 
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