I think there is a bug on the animations, check it out the CF Forums. It felt slow on my Corei5 notebook at first. You have to tweak something in the settings/graphics/animations select low there and/or no advanced animations.
My impression is that the animations relay on drawing and moving graphic files (with shades, etc.) in RAM all the time, with no GPU help. So lots of RAM helps. But that's my impression, it may be really just a bug.