Wall-E wrote:
They used to recommend nVidia, with as much VRAM as you could afford.
Now, it's more general.
Minimum requirements from their website for Win7 or 8:
1024 x 768 display (1280 x 800 recommended) with OpenGLĀ® 2.0, 16-bit color, and 512 MB of VRAM (1 GB recommended)