Hardware strangeness

Brand new motherboard Gigabyte GA-VM900M with Socket 775 CPU in it P4

3.0Ghz. and 512megs ram. Oddities happening all over this installation made

me doubt the thing is working right.

So, I decided to get out a brand new hard drive that has never been used

before, install XP fresh on it and install the motherboard drivers

thereafter. All APPEARS OK but when you do something requiring a lot of

mucking about, it sometimes dies. This is EXACTLY what happened with the

computer before under its own CPU and motherboard and older XP installation.

I thought the case may be busted because some fool who put the computer

together used the "case open" warning attachment on the motherboard to shove

the leads that show only power is on and the motherboard original in it had

slowly degraded to the point where it started throwing up errors that didn't

make any sense.

Therefore, there I am with brand new case, brand new motherboard, brand new

CPU, brand new HD and brand new ram and I install XP fresh. When it

finishes, all seems OK but the one thing that would kill the old machine

reliably was to do a chkdsk /r and command and reboot and let it do that. It

would get all the way through to test 5 of 5 and do that 100% and just when

it was supposed to reboot, wouldn't. It would, instead, blue screen with an

IRCL error "not equal to" or something along that sort of wording. So I did

that chkdsk /r with what is basically all new machinery and sure enough,

same problem. I figured the motherboard was probably wrecked because I put

it in the old case in the first place so put a new motherboard in a new case

and put new ram in it again and installed XP fresh all over again and did

the chkdsk /r on it again and same problem. However, boot off the XP CD and

go to the first repair prompt and do chkdsk /r there and it completes with

no errors and doesn't blue screen.

So has anyone any ideas why this is going on please? I think my eyes are

crossed and I cant see an answer because of that now because I cant see any

sense in it.

Any help appreciated.