I have the same issue , with the same card in CF , but the Game I face issues with is F1 2011. I've tried V-sync on / off. 12.3/12.4./12.7
F1 2011 - Single card - Average =48
Minimum - 38
CF - Average 47
Minimum - 39
However Dirt 3 ,Dirt Showdown and Crysis 2 scale to my satisfaction. Just not F1 2011
In the case of the OP , Its definately V-Sync, 59 FPS average should be pretty damn smooth.