I installed a new motherboard in my machine today, and it actually worked! (Not on the first try, mind you, but eventually.) It’s an ASUS A7V333, with an Athlon XP 2200+ processor, a Vantec fan/heatsink, and a 512 MB memory module from Corsair. It’s working fine so far, except that the processor is running at 53 C, which seems a little hot. Next week, I should be getting a new hard drive and video card.