TLDR:
USB Drive formatted FAT32. Change the BIOS file to a .bin
Long version:
New build, wanted latest bios and kept having problems. I'll list the steps to make it work below. First error I got was "No Disk Drive found" when I would click on Q-Flash. Second issue I ran into was the Q-Flash not seeing the BIOS file.
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Download the latest bios from https://www.gigabyte.com/Motherboard/Z790-AORUS-ELITE-AX-rev-10/support#support-dl (No idea if the bios changes from each version of the Aorus Elite so be sure you select the support page for the mb you're updating)
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Unzip the BIOS files you downloaded and rename the BIOS File to .bin. The file downloads as a .F#, the new motherboard was reading the file as a ".F#" file instead of a .bin
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Get a USB stick > Format it FAT32 > Copy the contents of that folder you downloaded to the USB stick
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Plug the USB into the computer with the bios your update(any USB port) > boot into bios via the DEL key > select Q-Flash(F8)
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Click on the picture of the USB stick > navigate to the BIOS file > double click the BIOS file > Confirm the install
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Computer restarts a bunch. It will take 5-15mins depending.
I will never understand why it's so hard for manufacturers to create instructions that actually tell the user what to do.
z790 update without entering BIOS
Asrock Z790 No boot device detected
Gigabyte Z790 Aorus Master No Bootable Drives
New build will recognize M.2 but won't allow it to be bootable w/ Aorus Z790 Elite AX
I'm not sure what your issue is, these sorts of things are hard to debug over the web.
That being said my machine just went down after several years of running Fedora telling me that the drive is "locked". A significantly different problem so lets not focus on that.
What I'm wondering is if anything odd happened during your install? I once has had a similar problem years ago when an install did not go through properly. I just did a reinstall and carefully looked at the disk setup and so forth. That is just made sure each screen made sense to me.
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