I'm wondering which will give me a bigger overall performance upgrade between the two. Currently I have a i5 3570k OC to 4.2 and GTX 670 sli. Now that's been said I play a lot of games that really use the CPU such as MMO's, and games like world of tanks. Now I know someone will say don't get either wait or what you have is good enough haha but I'm a FPS nut. I like seeing big numbers and stable frames. That being said I know that my two 670's are good for now, but I see the 780 ti having a longer life to max things out in the long run. Especially when I can pick up another one later on. so what do you guys think would be a better upgrade?