You're right, I should lower my slave's FPS and see if I can play well on my main, I used to think 30fps for slaves was necessary in order them not to stop following the main char, or lagging at casting spell !

Ok GTX560Ti is not a good example so if a change is actually needed I guess I'll go for a 7850 @2Gb (GO is what's you're used to deal with in France... ) it seems to be a quite fast card. Thanks for introducing Memory Bandwidth and Texture Fill Rate as I didn't used to paying attention to them ! However 660TI might be too expensive for me, ATI is what I'll look for !

I keep on thinking 2Gb will be necessary because of the sorts of benchmarks I've ran on the beta, it looks like MoP's new world is pretty heavy in terms of video memory. Since I'm really interested in playing world PvP with my 5-Box teams, I would be upset to get owned because of crappy FPS !