Hi everyone, I have a Mac Pro that I bought back in 2008. I haven't used it for a while so it's fairly outdated by now. It came with three ATI Radeon 2600XT (256MB each) graphics cards. Being not too familiar with graphics cards, I thought that this meant I had a combined 768MB available for rendering, etc. After Effects ran just fine back then, so I assumed that was the case. Then I learned about SLI/Crossfire. Since my Mac Pro doesn't support Crossfire under OS X, does this essentially mean that I'm still only using 256MB, with the only benefit being able to run several monitors? Please excuse me if I'm completely out in the left-field on this one. It's been a while since I've educated myself on computer hardware. Thank you!