Or get a new MOBO..... Rambus memory is wierd, and hard to deal with a lot of the time. I would highly recommend a new MOBO and processor (go AMD64 3000+ 939 Pin)
Or just get a new PC from www.cyberpowersystem.com
They have rock bottom prices and great systems. Try them, it is the onl-y place I buy from.
BTW- Your MOBO is ATX.