Here's another brick too. I had perfectly running C6H with 1800X ryzen. I switched ram speed from bios to 3200 what my ram supports. System booted and worked fine. How ever, I decided to get a new case for the new stuff and I shutdown my computer. Moved all the stuff to new case, booted up system, instead of booting there was message "Updating BIOS please do not poweroff", waited, waited, BAM screen blank, still waited 10mins more. Powered system off and computer did not boot anymore. Googling and stuff, did flash back for all the bioses for C6H available, system boots to ROG splash screen and text "press F2 or DEL to enter EFI BIOS setup", however, keyboard is not responding and cannot enter into BIOS, tested kbd on all usb ports. Error code is 0D but ram is 100% fine. Ironically radio plays Pink Floyd - Another brick in the wall... Some solution needed until Tue so testing all nights long...