Right now I'm running my 2x 2.8GHz Quad Mac Pro 3,1 with the ATI Radeon HD 2600 XT 256MB. Currently on OSX 10.9.5 with no issues. However, I can see myself upgrading to El Capitan or whatever comes after that eventually, and probably start to use some more image processing software (Pixelmator, Adobe cc etc) as well. I'm not planning on doing graphic-intense things (like heavy video and 3D rendering, animation etc) but I'm thinking in terms of having the Mac more compatible with current and future applications, video resolutions/outputs etc: is there a current equivalent (or better) card to the ATI Radeon 2600 from 2008 that I could be looking at to upgrade it? Do I need to? I'm not great with knowing which cards are best. From what I have read briefly is that Nvidia cards are probably a better option, but I'd rather ask for opinion from the macrumors community pros Any help and recommendations appreciated!