A 3.06ghz 12-core Mac Pro Mid 2012 recently fell in my lap, and i've never had a Mac Pro and navigating all the information on GPU upgrades hasn't left me with any clear vision. My priorities 1) Amateur Final Cut Pro X user- learning it right now, would like optimal performance 2) I am getting a 4k or 5k display in the next 6-12 months, I want the gpu to be able to drive it easily 3) Some gaming- I want a card that can run basic games on windows well, the most intensive being something like BF4. I haven't put these 5770s through their paces yet as I am waiting to upgrade the slow hard drive in this Mac Pro to a big SSD, but it sounds like they could handle most of the things I want to do. If you had a budget of $600, what card or cards would you go with? Keep in mind I know nothing about flashing or modifying power supplies. It looks like I can get about $150 for each of the 5770s.