this is my first topic on this site. I'm from Holland, so excuse me if my Enlish is not always correct

Since a week I have installed Maya 2012. Also the NVidia PhysX Plug for Maya 2012.
My computer is a Intel i7/920, watercooled and overclocked @ 4x4.2
I've got 12 Gb of RAM (Triple Channel) and a NVidia Quadro 4000 videocard with 256 CUDA cores.
What I see is that Maya is a lightly slow in showing the objects in the viewport en also in the rendering.
Because of the graphicscard I thought this was fast.
I there something I am missing ?
GuusJ