Graphic card has a very little role in 3d vector modeling, it's a CPU intensive task. However, when you render the 3d scene, video card comes into play, but there you need a workstation class graphics card like Quadro. Geforce 540 is a very entry level card, so don't expect much from it when rendering.
I am sure that in 2012 there will be firmware patches that will help and there are always hardware upgrades.