Bring it to home was quite challenging but it was worth it. I cleaned all parts and it was like a new Mac Pro. Even the spec was very standard, Im really satisfy with the performance. BUT, I still need to upgrade PCIE SSD, USB 3.0, GPU, RAM, and CPU(Maybe) I start downloading some apps especially OS X El Capitan. We'll see how the performance increase after I upgrade all parts. Question: I have HD 6870 from previous PC and Im thinking to replace Mac Pro's graphic card. Do I need AMD driver to update before I replace it?