"Abit IT7 help" or "I don't want to spend more $"

I don't want to spend any more money.

I bought an Abit IT7 motherboard last year with an Intel Pentium 4 processor. It was legacy free, which was great, until the USB ports stopped working. This meant no more keyboard. In fact, a PCI card with USB ports wouldn't work.

To fix my problem, I bought an Abit IT7 Max 2 as a replacement. Now, however, I have new problems. Anything that is sufficiently memory intensive will freeze up the computer, including installing Mandrake or Gentoo. I can boot from a LiveCD, but if I browse the Internet, for instance, without limiting my disk cache (which is stored in memory with a LiveCD), the machine freezes. If I limit it to, say, 10 megs, it works without incident.

At that point, I ran Memtest86, and I was getting memory errors. I assumed this was a memory problem. So, I bought a new stick of 2700 memory (from a different vendor), stuck it in instead of the old one, and I still have the same system freezes and get the same memory errors on Memtest86.

Do I have:
1) A bad motherboard
2) Bad Memory (again)
3) A bad processor
4) 1 & 2 but not 3
5) 1 & 3 but not 2
6) 2 & 3 but not 1
or
7) 1, 2, and 3?

Aw, stupid me. Make sure you check out your power supply first. A weak or dying power supply could cause a lot of the same problems.

"I am become death, the destroyer of worlds. Now, let's eat!

just for the future reference: there is not such thing as "dying" power supply, it is either working or not working.

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