I've got an i7 980x oc'd to 4.0ghz and 2 evga hydrocopper 2 gtx 580s (sli) oc'd to slightly over 1ghz core clock and I get an average of 55fps at 2560x1600 res with all settings on high (not ultra), on the largest conquest maps.

Also with 12gb of corsair dominators (the game's completely buffered). Now running an ocz vertex 3 max iops (fastest on the market at the moment) for the loading, not that it matters too much