This is a late comment but I had the same issue but realized there are two different pages depending on which version of the MOBO you have (Rev.1.0 & REV 1.X). I somehow found the REV 1.X page by luck and that BIOs download worked for me. Link below. https://www.gigabyte.com/Motherboard/Z790-AORUS-ELITE-AX-rev-1x/support#support-dl Hope this helps some folks out. Answer from Life_Weird3840 on reddit.com
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 aorus elite ax
Z790 AORUS ELITE AX (Rev. 1.0) Motherboard - GIGABYTE Global
Download motherboard BIOS file and rename to "gigabyte.bin", save to USB flashdrive, and plug USB flashdrive into Q-Flash USB port
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Reddit
reddit.com › r/buildapc › z790 aorus elite - how to do a bios update
r/buildapc on Reddit: Z790 AORUS ELITE - How to do a BIOS Update
February 15, 2023 -

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.

  1. 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)

  2. 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

  3. Get a USB stick > Format it FAT32 > Copy the contents of that folder you downloaded to the USB stick

  4. 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)

  5. Click on the picture of the USB stick > navigate to the BIOS file > double click the BIOS file > Confirm the install

  6. 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.

Discussions

z790 update without entering BIOS
QFlash+ extract the BIOS file to an USB drive (preferably some old USB2 one), rename the file to gigabyte.bin, stick the USB drive in back of the mobo in the port labeled BIOS and press the QFLash+ button on the mobo - the flashing procedure should take ~6minutes you need the PSU's 24pin and 8pin EPS connected to the mobo and PSU powered on note: the stick has to be formatted FAT32 More on reddit.com
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2
2
January 28, 2024
Asrock Z790 No boot device detected
The USB install drive is usually outdated. It is best to make your own install USB using the media creation tool from: https://www.microsoft.com/software-download/windows11 Assuming you have access to another USB Flash drive and PC running Windows to make it. More on reddit.com
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7
3
September 13, 2023
Gigabyte Z790 Aorus Master No Bootable Drives
Hey dude, thanks for posting your solution. It worked for me! More on reddit.com
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8
7
December 9, 2023
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.

More on reddit.com
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3
2
April 19, 2023
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 aorus master
Z790 AORUS MASTER (Rev. 1.0) Motherboard - GIGABYTE Global
Download motherboard BIOS file and rename to "gigabyte.bin", save to USB flashdrive, and plug USB flashdrive into Q-Flash USB port
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Gigabyte
download.gigabyte.com › FileList › Manual › mb_manual_intel700-features_e.pdf pdf
Unique Features (Intel Z790/B760 Series)
2. Extract the file and save the new BIOS file (e.g. Z790AORUSMASTER.F1) to your USB flash drive, or hard
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 aorus elite ax
Z790 AORUS ELITE AX (Rev. 1.x) Motherboard Support - GIGABYTE Global
Q-Flash Plus:Update BIOS Without Installing the CPU, Memory and Graphics Card * 8+8 phases parallel power design ... SupportCPU Support Memory Support Storage Support Manual FAQ CPU SupportMemory SupportStorage SupportManualFAQ · Technical SupportOnline Support Product Registration Online SupportProduct Registration ... DescriptionIntel SATA Preinstall driver (For AHCI / RAID Mode) (Note) Windows setup to read from USB thumb drive.
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 ud ac
Z790 UD AC (Rev. 1.x) Motherboard - GIGABYTE Global
Download motherboard BIOS file and rename to "gigabyte.bin", save to USB flashdrive, and plug USB flashdrive into Q-Flash USB port
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 gaming x ax
Z790 GAMING X AX (Rev. 1.x) Motherboard - GIGABYTE Global
Download motherboard BIOS file and rename to "gigabyte.bin", save to USB flashdrive, and plug USB flashdrive into Q-Flash USB port
Find elsewhere
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 aorus master
Z790 AORUS MASTER (Rev. 1.0) Motherboard Support - GIGABYTE Global
CPU support of motherboard is consist of BIOS and hardware design, detail CPU support information please see CPU support list.
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 ud
Z790 UD (Rev. 1.0) Motherboard - GIGABYTE Global
Download motherboard BIOS file and rename to "gigabyte.bin", save to USB flashdrive, and plug USB flashdrive into Q-Flash USB port
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 gaming x
Z790 GAMING X (Rev. 1.0) Motherboard - GIGABYTE Global
Download motherboard BIOS file and rename to "gigabyte.bin", save to USB flashdrive, and plug USB flashdrive into Q-Flash USB port
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 ud ax
Z790 UD AX Motherboard - GIGABYTE Global
Download motherboard BIOS file and rename to "gigabyte.bin", save to USB flashdrive, and plug USB flashdrive into Q-Flash USB port
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 gaming x ax
Z790 GAMING X AX (Rev. 2.x) Motherboard - GIGABYTE Global
Insert the USB flash drive into the Q-FLASH PLUS USB port. STEP 3: Press the Q-FLASH PLUS button, and the motherboard will start updating the BIOS automatically.
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 gaming x ax
Z790 GAMING X AX (Rev. 1.x) Motherboard Support - GIGABYTE Global
Q-Flash Plus:Update BIOS Without Installing the CPU, Memory and Graphics Card * 8+8 phases parallel power design ... SupportCPU Support Memory Support Storage Support Manual FAQ CPU SupportMemory SupportStorage SupportManualFAQ · Technical SupportOnline Support Product Registration Online SupportProduct Registration ... DescriptionIntel SATA Preinstall driver (For AHCI / RAID Mode) (Note) Windows setup to read from USB thumb drive.
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 d
Z790 D (Rev. 1.0/1.2) Motherboard - GIGABYTE Global
Insert the USB flash drive into the Q-FLASH PLUS USB port. STEP 3: Press the Q-FLASH PLUS button, and the motherboard will start updating the BIOS automatically.
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 s wifi ddr4
Z790 S WIFI DDR4 (Rev. 1.0) Motherboard - GIGABYTE Global
Insert the USB flash drive into the Q-FLASH PLUS USB port. STEP 3: Press the Q-FLASH PLUS button, and the motherboard will start updating the BIOS automatically.
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 gaming plus ax
Z790 GAMING PLUS AX (Rev. 1.0) Motherboard - GIGABYTE Global
Insert the USB flash drive into the Q-FLASH PLUS USB port. STEP 3: Press the Q-FLASH PLUS button, and the motherboard will start updating the BIOS automatically.
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Gigabyte
download.gigabyte.com › FileList › Manual › mb_manual_z790-gx-series_e_1201.pdf pdf
Z790 GAMING X AX Z790 GAMING X User's Manual Rev. 1201
Q-Flash Plus allows you to update the BIOS when your system is off (S5 shutdown state). Save the latest BIOS · on a USB thumb drive and plug it into the dedicated port, and then you can now flash the BIOS automatically by
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GIGABYTE
gigabyte.com › home › consumer › motherboard › z790 s ddr4
Z790 S DDR4 (Rev. 1.0) Motherboard - GIGABYTE Global
Insert the USB flash drive into the Q-FLASH PLUS USB port. STEP 3: Press the Q-FLASH PLUS button, and the motherboard will start updating the BIOS automatically.