Thanks John. It’s for FCP 7. I’m having major problems with video running on the viewer, and when trying to hook up a second display for preview purposes. Unrendered video (QT Prores LT) – which shows green in the video render status bar on the timeline – simply does not run, and stays on still image, whilst audio plays. Likewise when second display added that freezes too. Might this be an indication that the current GPU is failing?
The 2009 Mac Pro has 8GB of RAM.