AE CS6 is really Slow!

Hi,

So I have downloaded the CS6 suite to test before I sign up for the Creative Cloud.

I am finding AE CS6 to be slower than CS5.5, when I scrub through the time time line in CS5.5 I get an update in a pixelated preview but in CS6 all i get is the bounding boxes of the layers moving and ocasionally a really really pizelated preview which is usless. Adobe bosted that this iteration of AE to be faster than the previous, but I can't see it. All I am animating is basic 2D text!!!

Do I have to set up my Quadro 4000 or should it just work?

Thanks