If you are not experiencing problems, the usual advice is to not update.
The reason is that a failed flash might brick your motherboard or at least send you down a recovery path that you are unprepared for.
Interrupting the process will cause a problem.
That is why it is advised to use a usb flash process and not the internet which can fail.
During a flash,nothing will appear to be happening. For perhaps 15 minutes.
Do not get antsy and stop the process to start over.
If you are having a problem and there is a bios update that looks like it might fix it, then by all means flash.
Ryzen is tightly tied to ram and ram compatibility issues are regularly updated.
When a new bios is in place, it will be the default bios so make any changes you need to.
On a new build, I will flash immediately to currency.
If anything fails, there is little impact. Answer from geofelt on forums.tomshardware.com
Asus
asus.com › supportonly › rog crosshair viii hero › helpdesk_bios
ROG Crosshair VIII Hero - Support
"1. Update AGESA version to ComboV2PI 1.2.0.Ca Before running the USB BIOS Flashback tool, please rename the BIOS file (C8H.CAP) using BIOSRenamer." Downloaded · DOWNLOAD · SHOW MORE DESCRIPTION · ROG CROSSHAIR VIII HERO BIOS 4702 · Version 4702 · 20.83 MB · 2023/11/01 ·
Asus
rog.asus.com › motherboards › motherboards filter › rog crosshair viii hero › support
ROG Crosshair VIII Hero | Motherboards | ROG Global
AMD Ryzen 3000 series ATX motherboard with Aura Sync, SupremeFX, ROG Audio, Dual M.2, Realtek LAN, Dual Lan , M.2 heatsink and USB 3.2 Gen 2
Should I update the BIOS on my Asus ROG Crosshair VIII Hero ?
Thanks for any help! Edit: I restarted my machine and decided to go into bios for the first time, and by god it was so laggy, also stuck on AA Q-Code which could mean nothing or something. Specs: CPU: AMD Ryzen 9 3900X Motherboard: Asus ROG Crosshair VIII Hero More on forums.tomshardware.com
7
0
March 30, 2023Problems with BIOS update Rog Crosshair Hero VIII
Just reset the CMOS using the button on the back of your PC. You probably disabled the splash screen by accident when you were upgrading the BIOS. Also, as someone who owns that board, I'd strongly recommend NOT updating the BIOS unless something is wrong. BIOS updates screwed mine up to where I can no longer run my RAM at its intended speeds without constant crashing. More on reddit.com
3
4
December 8, 2023Solved: ASUS ROG Crosshair VIII Hero (wifi) / NEW BIOS 490... - Republic of Gamers Forum - 1045471
ASUS ROG Crosshair VIII Hero (wifi) / NEW BIOS 490... ... Solved! Go to Solution. ... just updated to that bios so far so good all RGB works great I'll let you know if anything goes wrong but so fare all good More on rog-forum.asus.com
FYI Crosshair VIII Dark Hero Bios Update
Thanks op I’m glad I searched up the bios before possibly upgrading. More on reddit.com
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21
March 27, 2024Videos
03:22
How to Update BIOS on ASUS ROG Crosshair X870E Hero – Step by ...
07:18
How to Update ASUS Motherboard BIOS with EZ Flash 3.0 (Step-by-Step ...
How to Update UEFI BIOS: Asus VIII Hero Motherboard: Ver ...
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How to Update Motherboard BIOS Without a CPU Using ASUS Bios ...
23:57
Flashing BIOS and Installing Windows 10 - Asus ROG Crosshair VIII ...
Asus
asus.com › supportonly › rog crosshair viii hero (wi-fi) › helpdesk_bios
ROG Crosshair VIII Hero (WI-FI) - Support
"1. Update AGESA version to ComboV2PI 1.2.0.Ca Before running the USB BIOS Flashback tool, please rename the BIOS file (C8HW.CAP) using BIOSRenamer." Downloaded · DOWNLOAD · SHOW MORE DESCRIPTION · ROG CROSSHAIR VIII HERO(WI-FI) BIOS 4702 · Version 4702 ·
Asus
rog.asus.com › motherboards › motherboards filter › rog crosshair viii dark hero › support
ROG Crosshair VIII Dark Hero | Motherboards | ROG USA
Product Support for ROG Crosshair VIII Dark Hero Select Other Model · By registering your device, you can easily manage your product warranty, get technical support and keep track of your repair status. REGISTER YOUR PRODUCT · Disclaimer · Specifications and features vary by model, and all images are illustrative.
ASUS
asus.com › us › supportonly › rog crosshair viii dark hero › helpdesk_bios
ROG Crosshair VIII Dark Hero - Support
"1. Update AGESA version to ComboV2PI 1.2.0.Ca Before running the USB BIOS Flashback tool, please rename the BIOS file (C8DH.CAP) using BIOSRenamer." Downloaded · DOWNLOAD · SHOW MORE DESCRIPTION · ROG CROSSHAIR VIII DARK HERO BIOS 4702 · Version 4702 · 20.83 MB · 2023/11/01 ·
Asus
asus.com › supportonly › rog crosshair vii hero › helpdesk_bios
ROG CROSSHAIR VII HERO - Support
"1. Update AGESA version to ComboV2PI 1.2.0.Ca Before running the USB BIOS Flashback tool, please rename the BIOS file (C7H.CAP) using BIOSRenamer." Downloaded · DOWNLOAD · SHOW MORE DESCRIPTION · ROG CROSSHAIR VII HERO BIOS 5302 · Version 5302 · 15.81 MB · 2023/11/10 ·
Asus
rog.asus.com › motherboards › motherboards filter › rog crosshair vii hero › support
ROG CROSSHAIR VII HERO | Motherboards | ROG Global
Product Support for ROG CROSSHAIR VII HERO Select Other Model · By registering your device, you can easily manage your product warranty, get technical support and keep track of your repair status. Upgrade Warranty: Here. * Please note that the availability of the Premium Care product lines might differ by country.
Top answer 1 of 4
1
If you are not experiencing problems, the usual advice is to not update.
The reason is that a failed flash might brick your motherboard or at least send you down a recovery path that you are unprepared for.
Interrupting the process will cause a problem.
That is why it is advised to use a usb flash process and not the internet which can fail.
During a flash,nothing will appear to be happening. For perhaps 15 minutes.
Do not get antsy and stop the process to start over.
If you are having a problem and there is a bios update that looks like it might fix it, then by all means flash.
Ryzen is tightly tied to ram and ram compatibility issues are regularly updated.
When a new bios is in place, it will be the default bios so make any changes you need to.
On a new build, I will flash immediately to currency.
If anything fails, there is little impact.
2 of 4
1
Thanks for your replies! I've done the BIOS flashing before with a usb stick (still have it) through the BIOS.
With the laggy bios it ain't going to be very fun. Might be why when I first built this it was a frustrating experience for stability.
By laggy do you mean the mouse pointer?
I just use keyboard to navigate around...arrows up/down/left/right work perfectly and usually pretty speedy...with my Asus B550 board.
You might also reset CMOS before going into the in-BIOS update utility. It might help with everything in full defaults. And lastly simply try different USB ports.
Asus
rog.asus.com › motherboards › motherboards filter › rog crosshair viii hero (wi-fi) › support
ROG Crosshair VIII Hero (WI-FI) | Motherboards | ROG United States
Product Support for ROG Crosshair VIII Hero (WI-FI) Select Other Model · By registering your device, you can easily manage your product warranty, get technical support and keep track of your repair status. REGISTER YOUR PRODUCT · Disclaimer · Specifications and features vary by model, and all images are illustrative.
JustAnswer
justanswer.com › computer › qjiq0-i-m-trying-update-asus-rog-crosshair-viii-hero-wi-fi.html
I'm trying to update my Asus Rog Crosshair VIII Hero (WI-FI) motherboard bios but I can't figure out what I'm doing
November 9, 2024 - To update the BIOS on the Crosshair VIII Hero, download the correct BIOS version from Asus’s official site. Use the USB BIOS Flashback feature by placing the renamed BIOS file on a FAT32-formatted USB drive. Insert it into the designated USB ...
Reddit
reddit.com › r/asus › problems with bios update rog crosshair hero viii
r/ASUS on Reddit: Problems with BIOS update Rog Crosshair Hero VIII
December 8, 2023 -
After the logoFail vulnerability was disclosed I downloaded the latest BIOS (4702) for my mobo. Used the EZ Flash inside the BIOS to update, which seemed successful, and then continued with the restart when prompted. However upon restart my system seemed to hang indefinitely with the mobo error code d6 which is "no console output detected." I pressed restart after waiting quite a few minutes and my system seemed to boot fine except it completely skipped the Asus splash screen and went directly to Windows. This concerned me so I attempted to restart and enter the BIOS to no avail. Spamming the delete key constantly from the moment of restart till the Windows login screen appeared did nothing. I tried using the advanced startup options to restart directly into the UEFI but it still boots directly to Windows. I then used the mobo BIOS flash button and a thumb drive with the new BIOS on it to reinstall it, just in case the install was botched, but after the BIOS reinstalled I still have the exact same issue. Any help would be greatly appreciated because my anxiety is about through the ceiling. Thanks.
Edit: Solved
Ok, this was extremely weird but just in case anyone else has this problem and nothing else works try this if you have an Nvidia card.
1 - Go to:https://www.nvidia.com/en-us/drivers/nv-uefi-update-x64/
2 - Download the file there and run it and if a firmware update is needed let it update it.
3 - Restart your PC and see if you get the normal splash screen and are able to access your BIOS
Top answer 1 of 3
2
Just reset the CMOS using the button on the back of your PC. You probably disabled the splash screen by accident when you were upgrading the BIOS. Also, as someone who owns that board, I'd strongly recommend NOT updating the BIOS unless something is wrong. BIOS updates screwed mine up to where I can no longer run my RAM at its intended speeds without constant crashing.
2 of 3
2
Ok, this was extremely weird but just in case anyone else has this problem and nothing else works try this if you have an Nvidia card. 1 - Go to: https://www.nvidia.com/en-us/drivers/nv-uefi-update-x64/ 2 - Download the file there and run it and if a firmware update is needed let it update it. 3 - Restart your PC and see if you get the normal splash screen and are able to access your BIOS
FlashMyBoard
flashmyboard.com › mb › Asus_ROG_Crosshair_VII_Hero_(Wi-Fi)
Asus ROG Crosshair VII Hero (Wi-Fi) BIOS - Analysis, Alerts & Downloads
October 27, 2025 - "Enhance system stability, security, and compatibility.Before running the USB BIOS Flashback tool, please rename the BIOS file (C7HWIFI.CAP) using BIOSRenamer." ... Initial firmware development focused on stabilizing the AM4 platform for Summit Ridge and Pinnacle Ridge architectures. Update v0509 and v0702 integrated AGESA 1.0.0.2a/c to resolve early memory training failures and fan calibration offsets.
Asus
rog-forum.asus.com › t5 › amd-500-400-series › asus-rog-crosshair-viii-hero-wifi-new-bios-4902 › td-p › 1045471
Solved: ASUS ROG Crosshair VIII Hero (wifi) / NEW BIOS 490... - Republic of Gamers Forum - 1045471
November 15, 2024 - ASUS ROG Crosshair VIII Hero (wifi) / NEW BIOS 490... ... Solved! Go to Solution. ... just updated to that bios so far so good all RGB works great I'll let you know if anything goes wrong but so fare all good
FlashMyBoard
flashmyboard.com › mb › Asus_ROG_Crosshair_VIII_Hero
Asus ROG Crosshair VIII Hero BIOS - Analysis, Alerts & Downloads
October 27, 2025 - Version v4402 updated to AGESA 1.2.0.8, unlocking native Curve Optimizer support for the 5800X3D. Security hardening continued in v4805 (AGESA 1.2.0.Ca), which patches the LogoFAIL image parsing exploit and Zenbleed AVX2 corruption bug.
Asus
rog.asus.com › motherboards › motherboards filter › rog crosshair vii hero (wi-fi) › support
ROG CROSSHAIR VII HERO (WI-FI) | Motherboards | ROG Global
ROG Crosshair VII Hero X470 motherboard with Aura Sync, ROG Audio, Dual M.2, Intel LAN, onboard Wifi, VR, M.2 heatsink and USB 3.1 Gen 2
Reddit
reddit.com › r/asusrog › fyi crosshair viii dark hero bios update
r/ASUSROG on Reddit: FYI Crosshair VIII Dark Hero Bios Update
March 27, 2024 -
Just in case anyone was thinking of upgrading their am4 crosshair viii dark hero board to bios 4805 that released a few days ago, it breaks the ability to control the board LEDs such that ‘off’, ‘black’, ‘dark’, etc. is bright green. Breaks any aura designs you have that include the board. A few stock ones work but almost everything resolves to static bright green.
I downgraded back to 4702 and the issue was completely resolved. Just wanted to post it because I didn’t see anyone else who struggles with obsessive compulsive tendencies post about it on any of the boards I read.
I hope this helps someone
H|ard|Forum
hardforum.com › [h]ard|ware › motherboards › amd mobos
ASUS ROG Crosshair VIII Hero newest BIOS (ver. 4004). How's it working for everyone using this mobo | [H]ard|Forum
February 24, 2022 - Well, ASUS just made it a non-BETA BIOS at ver. 4004. Here's the notes on it: ROG CROSSHAIR VIII HERO BIOS 4004 "1. Update AMD AM4 AGESA V2 PI 1.2.0.6b 2. Improve system performance and stability I'm running a Crosshair VIII Hero non Wi-Fi and have this BIOS downloaded.
Asus
asus.com › supportonly › crosshair vi hero › helpdesk_bios
ROG CROSSHAIR VI HERO - Support
1.Update AGESA version to ComboV2PI 1.2.0.Cc 2.Improve security 3.Improve system stability Before running the USB BIOS Flashback tool, please rename the BIOS file (C6H.CAP) using BIOSRenamer · 1. Update AM4 combo PI 1.0.0.4 patch B 2. Fixed a compatibility issue with M.2s when using Ryzen ...
Manual Owl
manualowl.com › m › Asus › ROG-Crosshair-VIII-Hero › Manual › 560378
BIOS update utility, USB BIOS Flashback | Asus ROG Crosshair VIII Hero | Users Manual English (Page 60)
Home » Asus Manuals » Motherboards ... BIOS without entering the existing BIOS or operating system. Simply insert a USB storage device to the USB port, press the USB BIOS Flashback button for three seconds, and the BIOS is updated automatically....
Linus Tech Tips
linustechtips.com › computer hardware › cpus, motherboards, and memory
how to flash BIOS on Asus Crosshair Hero VIII? - CPUs, Motherboards, and Memory - Linus Tech Tips
March 11, 2021 - My dear friends, in case I want to flash BIOS I need to ask you few things before doing this? I understand procedure but: 1.Do I plug in usb flash drive in any of the USB ports or particulary USB port marked as BIOS? 2.Does USB flash drive need to be formatted in FAT32 or NTFS? 3.Do I need to ren...