So I bought an Alienware Aurora R5 some years ago and recently bought a new CPU (AMD Ryzen 7 2700X) and a new AM4 motherboard. When I unpacked it all I realized that first of all the motherboard was too big so I am trying to return it and get a micro-ATX motherboard. 2nd problem is that the fan that comes with the CPU is too big for my case. The alienware case is set up in such a way that the power supply is on a "swinging" door that opens up, in other words when the computer is closed the power supply is right next to the CPU and does not allow enough room for the fan that came with the CPU (The new fan is roughly 3.6 inches tall). I am considering buying a new case that could fit the motherboard I got and the fan, however I'm not sure how well all of the components would move over from a pre built computer to an empty case. Any ideas, I would really appreciate the help. Thanks guys.