It is a Dimension 8100 1.3 ghz, 256 RDRAM, 64 GeForce video, Santa Cruz sound card, 60gb HD. I have found a new Dell mobo on E-bay that fits the Dell part number. I can under extreme duress change out computer parts, but never as sophisticated as a motherboard. I have looked at some other posts on this board and it seems that Dell makes it as difficult as possible. I thought if I could get the board off and just replug everything else back in, it would be okay. Now, I am not so sure.