Hopefully that sounds like a strange request, because I couldn't find anything on the web (not without Mac OS being part of the equation). But, as the title suggests, I'd like to use my MacPro3,1 as a dedicated PC. Just don't use Mac OS anymore, and lust for the freedom of slapping any video card I want in there w/o having to perform surgery for OS X compatibility. Is this possible? And would there be any technical limitations due to Apple's hardware? Was even considering selling it and building my own PC, but the cost to match the performance of my MP would be about the same anyway, so just figured I'd ask first to save me the headache of selling the MP, buying parts, and then building from scratch.