Built a computer for my son to game on. I have a MSIK8N Neo4 Platinum/SLI mobo. I have been running two Nvidia NX7600GT's. One of them blew the other night. Any suggestions on what to upgrade to? I have a 600w power supply so I think I'm pretty good there. I'm kind of new to the building and compatibility part; so any help would be wonderful and well appreciated. Also, probably a stupid question but here goes. I assume that since I'm running dual cards now, I will continue to run dual cards? Would like to stay with Nvidia products. Thank you in advance!