Is there any articles or comparisons that compare this setup? I currently have one gtx 680 ftw 4gb and don't know if I should wait till the price drops and get another for sli or buy 780. I bought the 680 less than a year ago that's why I am not jumping on the 780 so quickly.
Best comparison I could find or you could browse the forums on this topic at overclock.net about it. I went from a 3Gb 580 to a single 780 and couldn't be happier, my games jumped on average about 40 fps at 2560 x 1600 res.