My 2 cents... I just read all the specs in another forum labeled almost the same as this, one guy put it simply, the 690 is 2x680s but the advantage is in every category where is the 780 Ti is only one, well, 780..., BUT it is indeed the fastest single GPU and if numbers are thrown out the window like Overclocking, then the 780 Ti is better than the 690... Just recently I was on http://pcpartpicker.com/ and it showed the highest clocked 690 is the Asus GTX690-4GD5 4GB 915MHz and the fastest 780 Ti is the EVGA 03G-P4-2888-KR 3GB 1.02MHz. It also shows the fastest cards period are the 650, 680 and 770 all at 1.20MHz but with only 2GB memory