I can find you posting "build and boot" and "build & boot" but I've yet to find an explanation other than when you first got your ASUS board, and that was pretty simplified.
Oh well, no biggie, maybe someone else will chime in, either way I'm sure I'll be alright. There's just so much more STUFF than there used to be.
Fine...here's the procedure:
Start with your motherboard on a piece of cardboard or other non-conductive surface.
install ONLY the CPU & cooler, ONE stick of RAM in the appropriate slot for single stick configuration, (see your manual) and your video card. Connect the necessary PSU cables, and the appropriate wiring for the case on/off switch.
See if it will boot to BIOS.
If so, add your boot drive.
Try again. If the drive is recognized in the BIOS, add one more stick of RAM for dual channel configuration.
Try again...repeat until you have all RAM installed.
If that goes well, install your ODD and try again.
Then, IF you've managed to get everything installed and still can boot to the BIOS, disconnect your wiring and install the board into the case. You SHOULD be able to do this without removing your CPU cooler or RAM.
Then, reconnect your wiring and make sure everything still works correctly...spend a bit of time working on cable management for air flow...and install your OS, drivers, motherboard utilities, etc...and enjoy.
The reason for going through all these steps is to isolate each piece of hardware during the installation. By building outside the case first, you eliminate any possibility of shorting between board and case...which is often the problem with many problems we see here. (stand-off in the wrong place, etc.)