Написано же для тупых:
What graphics cards are supported?
In general, any NVidia graphics card with more than 1Gb or memory and compatible with CUDA 2.0 should work. However, to ensure a good framerate, the GTX serie is highly recommended, both for laptop and desktop configurations.
We develop Skanect using an Asus laptop with a GTX 560M, an Alienware laptop with a GTX 580M, and an Alienware X51 desktop with a GTX 660.