Here's the GTX 780 @ 1200Mhz.
To put in perspective the reference GTX 780 is at 900Mhz, this card came with 1060 out of the box, and it went to 1200Mhz without a fuss. I think 1250 or 1300Mhz is probably doable. At this speed we're approaching the same performance as the 780 Ti.
