Hi again It's a IBM ITELLISTATION Z PRO, with two SL72Y's, HT's, it got 6 gigs of ram, a nivdia geforce 7800 gts/256, and running win XP PRO on one hard drive, and win vista home on the other, the computer runs great, and is fast,i just built it as a project for under 150.00 dollars, and i'm giving it to my son, for his room. replacing a dell gx270 p4 3.4/1m/800, with 2gigs of ram, that stop working do to a mother board problem....he loves the z pro, and hopefully it will last a few more years, it was built in 2006,but runs GREAT Thanks for the helpful answers,to all