I've recently had to RMA my mobo and CPU. When I put in the replacement mobo and CPU, will I have to reinstall Windows 7? I heard somewhere that Windows has to recognize the unique serial of the CPU, such that you would have to reinstall if you replace the CPU, even if the model is identical. Is this true?
If it is the same board then there is no need. It is if you replace motherboard with a different board that you have to reinstall windows (at least repair install). CPU's you can change left and right.