Originally Posted by OhSnapWord
Most of the time, aftermarket motherboards don't work in OEM cases. The problem lies in the front panel connectors. Most OEMs use proprietary connectors to connect the front panel to the motherboard. You wouldn't be able to connect the power switch or any of the LEDs.
Precisely, even aftermarket power supplies are not compatible with oem cases
I think you should also invest in a case as well if you are going to be building your pc from The ground up