CF - possible but not advisable due to the 16/4 when 2 cards are used? With the raw power of a HD 7970 GHZ edition, there is no need for multi GPU set ups gaming on a 1080p display for me ^^ Hell some say even @ 5760 x 1080 a HD 7970 GHZ is good to go @@
http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/54954-amd-radeon-hd-7970-3gb-ghz-edition-review-18.html