Here's a link to a benchmark many are using that will help in deciding what graphic card to buy for FCPX use: http://www.fcp.co/forum/hardware/18250-brucex-try-this-new-final-cut-pro-x-benchmark (When you run the benchmark, just output to standard ProRes. Most are having trouble exporting to H264) I wish I had seen that thread before I purchased my card. I have an MSI GTX 650ti. Works flawlessly. I added a 2nd identical card (just dropped it in - no configuration needed) and FCPX performance increased dramatically. Using this benchmark my times improved from 76 seconds to 48 seconds. The new Mac Pros are scoring below 30 seconds. When looking for a video card, I would get one with as much VRAM as you can afford and the Radeon cards seem to be handling OpenCL much better than Nvidia. Post your benchmark times here.