How Do I Reset Mobo To Original In-The-Box State - Fresh Start Desired

Hello Gents, My name is James & this is my first post here. I built my own rig last year for the first time ever, and installed everything just fine. But now I have purchased a number of SSDs, and really just want to start all over again right from scratch. I'm talking about resetting the MoBo and starting as if I was firing it up for the first time to install from my Windows 7 - 64...