Hi guys a recently came across a alien ware area 51 PC desktop. Now I thought it was gonna be a gaming beast for the price I paid of only $100 bucks. Come to find out its extremely old and runs a Pentium 4 in it as well as old graphics card of a Ati radeon 800xt. Now my question is whatcan iI do to upgrade with the case. Can I just remove the motherboard and cpu and replace with another newer one or will I need to remake a whole new computer. Its a dell area 51 4500 I believe.