graphic upgrade sli

atomicWAR

Glorious
Ambassador
i have the same motherboard in one build...any PCIe vid card will work in it...though i might suggest a pair of gtx 670s...able to play crysis 3 maxed out at ultra and msaa 8x af 16x

as for cards in sli gtx 660 an up do sli for 600 series...gtx 550 up for 500 series
 

atomicWAR

Glorious
Ambassador
what kind of power supply? also what is your budget? generally speaking with what you have i would go with a pair of GTX660 TI's or if you want to go more high end get gtx 670 OC'd...beyond that the price/performance ratio isn't to hot. You might want to overclock your CPU some. i have the same one in another build. I was able to get it up to 4ghz @ 1.34v. i run it with two OC gtx 570's though i have a pair of MSI twin frozr OC'd gtx 670's i love in my 3930k build.