I just purchased and installed a new LGA 1155 H77 motherboard, Core i5 CPU, memory, GeForce gfx card, DVD drive, and power supply for my home PC, to replace all those old items. I retained the case itself, fans, and both internal HDD's. But for all intents and purposes it's a new build.
After installing everything and doing a fresh install of Windows 7 x64 on my smaller HDD (larger HDD with data remained unchanged), I have now decided I would like the Z77 version of the same motherboard, mainly because it has many more fan connectors on the board, as well as additional USB ports on the rear.
Is it possible to simply swap out the motherboard such as this, using the same CPU and OS installation? It's not a big deal if I have to install Windows 7 again to be safe, as I haven't loaded much of anything onto it yet, but just trying to save some time and hassle if possible.