1 Gig of ram, theres 4 ram slots onboard, so you wouldnt just buy 1 gig of ram, most likely you used 4 sticks of 256 ram to cut down on costs so....
http://www.newegg.com/app/ViewProduc...211-005&depa=1
$33 per stick X 4 = $142
So I know you dont have any raid on it, its only 120 gig hd, so theres no raid controller...