hey guys, im throwing together a quick rig for my nephew. i built him a crappy rig a while back (q8400, 4gb ram, 9600 gso) but he's been taking gaming a lot more serious than i anticipated. His birthdays coming up now so I wanna build him a new rig. I have an evga 450 laying around somewhere that i never actually used and i'm trying to decide what would be the better solution, since i'll buy a new graphics card.
so, would it be more efficient to get another 450 and run them in sli? or go ahead and get a gts 550 ti (2gb version)