So I'm running a Mac Pro 2,1 right now with Windows 7 running in Bootcamp from its own drive (the entire drive is partitioned for Windows). I'm planning on upgrading to a 5,1 (or 4,1 with 5,1 firmware upgrade). At the moment I have a 5770 graphics card in my machine and the "new" one will probably have either a GTX680 or 780 card. My question is, is there any way to just take the Windows drive out of my existing computer and pop it into one of the bays on the new computer so I don't have to completely re-install everything? I know I'll probably have to install additional drivers so that Windows can use the new hardware, but I don't know how to do this or if it can even be done. If someone could give me a brief walkthrough so I know what to expect, I'd really appreciate it. Also, if there is anything I should know about the performance of these graphics cards in Bootcamp, that'd also be nice.