Hello @testdasi,  Amazing thread! A lot of great information here.  I am using the same MOBO currently (had to replace a x399 that died recently).  Can i ask you what settings you used on the BIOS to get the USB to boot ?  I created it using the UNRAID boot maker.  It has been years since i had to finagle with the gigabyte bios and i am completely at a loss after reading the Limeware 'getting started guide' If you could help shed any light on this situation it would be greatly app