cmdrdredd Lifer Dec 12, 2001 26,948 308 126 Aug 26, 2012 #26 leonlee said: Doubt it. CrossFireX and SLI are limited by the weakest link in the chain. Click to expand... SLI won't work unless you have identical cards with identical memory amounts. For example a 4GB GTX 670 won't SLI with a 2Gb GTX 670. Likewise a GTX 680 cannot work with GTX 670.