IF you swap the Mobo out you will need to BUY a new copy of Windows. The OS is tied to the hardware when purchased from a OEM (Dell, Gateway, etc.). Personally if your having to do ALL that just buy a new system, the good news is if you grab a generic i7 Desktop, swap out the PSU and plug in the 780 you would be set with minimal effort or impact. Try www.slickdeals.net and search for i7 Desktop (can be had as low as $525) and do as I suggest. To keep your data, use a external drive and run Windows Easy Transfer to move from your old Aurora to the new PC.