Hopefully there are people on here that do 3D design shizz. I have a GTX560Ti and I'm using Blender to model cars. I've ran a few tests and the viewport performance is, quite frankly **** when scenes are 2 million polygons and up. Blender uses OpenCL (OpenGL?) but I've heard that nVIDIA have deliberately made the OpenCL/GL performance poor on their gaming cards to force consumers to buy their insanely expensive Quadro cards. In 3ds Max however I can get 12 million + polygons in one scene and the card just sits there smoking a cigarette (Max supports DX11) as if it's not even an issue. (if anyone wants to lend me £3,500 for a full version please PM me). As far as I'm aware ATI cards excel in OpenGL, however I'm not sure if it's worth getting an ATI card for the viewport and leaving the 560Ti in for gaming. I can use the layering system for hiding things but it's not ideal. It might be worth getting a 'low-end' ATI gaming card, because the Blenderheads determine that a high end card is not necessary.