I am running Adobe CS5 on a Windows 7 64-bit machine with 12GB RAM. Although I have a Quadro CX. the Premiere CS5 complains that it cannot use the Mercury Playback Engine GPU Acceleration. It happened after the recent update of CS5. I checked the contents of the file cuda_supported_cards.txt and there seems no problem at all. I am lost. Any kind of help will be appreciated.
Try updating your video card driver.
Many thanks. Updating the driver manually did the trick.