660ti is a good card, faster than a 580, and at that reso you should be fine.
for comparison im running a 670, ultra settings, almost every time above 60, even if it drops to 50's i don't notice it due to the all the action going on.
im on 1080p, running 4ghz cpu
Wow thats very informative, thanks Cons
. By the way, you use what resolution with that 670? 1080p?