I would love to go with a 7990 or even a 7970 but my wallet doesnt really permit me; and so i have found that the 660ti seems to be the best bang for your buck card.
Would i need to OC my motherboard or can i leave it at stock speeds, 3.2ghz, without having the 660ti bottleneck?
And does it permit some sort of problem if i use a AMD cpu and a Nvidia GPU?
I never bother to overclock, nor should you need to for games.... and amd cpu is fine with nvidia card and other way round as well..
All the best Brett