I have a Dell Precision M6500 Mobile Workstation with an NVIDIA Quadro FX 2800M graphics card. I have CUDA enabled using the well-known CUDA hack. As unsupported as it is, I see no reason why this card shouldn't work just fine with PPro CS6. It has 1 GB RAM.
I am using Windows 8 x64 and NVIDIA driver package 311.50. I just updated to that hoping it would help the issue but it does not.
When I open an exisiting or create new project, Mercury is enabled. When I playback, after about 3 seconds, the display driver crashes.