First Boot No Power Need Help?

unplug EVERY wire, and then triplecheck that you plugged them in the right way. sometimes, you have to plug in USB headers just right for them to work. Also, make sure that your power supply is connected to the 4 pin CPU power socket, and that the wide connector is plugged into the wide socket on the motherboard. Make sure that you have all of the drivers for your hardware ready so that you can install them after you install the OS