Well, is this CPU gonna be a bottleneck for a GTX 660 Ti or 670? I'm currently using a GTX 480 and there does not seem to be a problem for demanding games like Batman Arkham X series and performance is close to benchmarks around the web for GTX 480 on faster CPU's.
Planning to sell my GTX 480 and replace it with a GTX 660 Ti or 670 depending on the budget.
The main reason for that, if you are interested, is to have 3 monitor setting on a single card without performance deterioration. Don't wanna go SLI with 480's, you know why