the compaq harddrive and cdrom drive and the ram will not work with another mb other than compaq, so you would have to figure in the cost of a new hd and cdrom too. as for that ecs motherboard i would not suggest buying from ecs. i've owned and built computers using their products before and had nothing but problems with them. biostar makes a pretty decent motherboard (much better than ecs) you can get a biostar nforce2 motherboard for 49 or the biostar nforce2 ultra 400 board for 62. the nforce2 400 ulta board also has a 15 dollar mail in rebate right now which brings the board down to 47 if you use the rebate. both boards can be found on www.newegg.com