I currently have an AMD 5770 in my MP 5,1 (2.8 ghz 2010). I use Photoshop a lot, and do some gaming on occasion. I have a 20" Apple Cinema Display (older aluminum case). I use Photoshop mostly for batch editing scanned documents, and the 5770 seems to do ok with that, but it falls short even when playing Civ V at the highest settings, and now Aspyer has released Civ VI which apparently is not compatible with this old card. I'd like more a more powerful GPU without needing an extra power supply. I want to keep my boot screen, and I don't want to worry about the card not working everyy time I updated the OS. I tried searching the forum, but so far everything has scared me off. I am such a newb to this. It seems that GPU swaps aren't as plug and play as the Mac was once famous for.