Bought new RAM and it doesn't work. I thought you needed to be able to at least boot in order to use EZ Flash and update BIOS?
Nope. There is a BIOS flashback option on new ASUS boards by which you put the BIOS on a USB stick and just connect the 24-pin power connector to the motherboard. Then, there is a specified USB port you put the stick into and turn the power on on the PSU. You hold down the BIOS flashback button for a number of seconds and an indicator light will let you know when it has completed. The instructions are all detailed in the motherboard manual.
I updated my BIOS on my P9X79 Pro in this manner when I first brought it home. I saw this option in your motherboard's manual on the Asus site. Check your manual. There's also more info about it on the Asus web site as well.