Just wanted to add that I have the same issue. Probably another blacklisted card. It's a pretty old card: GeForce 8800 GS (512 MB).
Other specs: Core 2 Duo, 4GB RAM. Took a sample from Activity Monitor and posted it below, although I don't know if it'll help.
Sampling process... [saved and removed]
Last edited by Raze; 03/01/15 04:38 AM.