I've found the same problem on this Forum and someone answered that the capsule header should be removed.

Yes, it was successful. Now I have in the boot section PATA SS.

@Fernando
For all modern ASUS Z390 motherboard the flashback button is no longer offered.
Only ASUS EZ Flash 3 Tool is offered at the BIOS menu and does work well for official BIOS offered by ASUS.

Modded BIOS via UBU Tool is refused by ASUS EZ Flash 3 Tool: "Selected File is not a proper BIOS !"

How can we flash modded BIOS for these recent motherboard ?

Mod BIOS cannot be flashed by EZ Flash @100PIER - you will have to dump BIOS region via FPT, modify that, then unlock BIOS Lock via my guide, then flash mod BIOS
There may be some AFUxxx (DOS/CMD/GUI) that will flash a mod BIOS to these boards, but I am not aware of what that version is or the required method due to I do not use or suggest using AFU for other than stock purposes
You can try this method in last spoiler (In general, flash stock, then flash mod without rebooting between), with all AFU you can find (PM Me) -https://linustechtips.com/main/topic/592...r-motherboards/
But, I do suggest the first method and my guide, it will save you time and hassle trying to find which if any AFU version will work for you.

As for the actual error you're seeing now, this is due to UBU removes BIOS from capsule, you will need to put body back inside capsule and try again (it will fail due to security then, because of mod BIOS)
To do this, open stock BIOS (.cap BIOS) in hex editor, then open copy of your mod BIOS rom/bin from UBU in hex editor. Select all of your mod BIOS, copy, then go to stock .cap BIOS, go to 1000h location in hex and paste your mod BIOS, then save with new modbiosname.CAP
New modbios.cap will be 4KB bigger now (matching stock BIOS size) vs the file you received from UBU that is 4KB smaller than stock BIOS (Due to removed 4KB security capsule)

* Edit @100PIER - Now I see you are talking about a UBU modified BIOS, that is already back inside a capsule. Mod BIOS can only be flashed how I mentioned above with capsule on much older boards, in very few instances EZ Flash would allow it.
Current modern boards, only way to flash mod BIOS for Asus is via USB Flashback or by using my guide here (pay attention to the warnings!)
* Edit2 Edit @100PIER - Since your board does not have flashback, FPT flash will be only way, unless you can find working version of AFU then it could be possible that way too. I need a FPT BIOS region dump from this board before I can find the variable to use to unlock BIOS Lock, I can't get it from the stock BIOS.

Zitat von lordkag im Beitrag #292

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@MDoehler
There are a few things to check before moving on:
- DO YOU UNDERSTAND THE RISKS INVOLDED? I write in all caps because it is a serious matter. Despite my best intentions and my research, things can very well go south and you might end up with an expensive brick. Remember that I patch a firmware flasher to ignore some safety/security measures.
- Do you have an ASRock Fatal1ty Z370 Professional Gaming i7 with the latest BIOS, which is 3.20 at the time of this post?
- Can you flash a modified image with Intel FPT or by any other method? We need a way to flash a patched Instant Flash module.

If we can proceed, these are the steps:
1. Flash the latest official unmodified BIOS from ASRock with Instant Flash. We need to rule out any bugs in the official firmware.
2. Dump your current BIOS with FPT using the command "fptw64 -D bios_full.bin" and also "fptw64 -BIOS -D bios_rgn.bin". Keep them safe, put them on some external flash storage.
3. Using the files from the point above and the attached archive, run the following commands: "UEFIPatch.exe bios_rgn.bin patches1.txt -o bios_rgn_p1.bin" and also "UEFIPatch.exe bios_full.bin patches1.txt -o Z37_p1_3.20".
4. Run the command "fptw64 -BIOS -F bios_rgn_p1.bin".
5. Shutdown the computer.
6. Enter Instant Flash and try to flash a modified image that previously gave you an error. Remember to apply the patch using "UEFIPatch.exe your_bios_file.bin patches1.txt -o your_bios_file_patched.bin"
7. If unsuccesful, repeat steps 3-6 while replacing patches1.txt with patches2.txt and bios_rgn_p1.bin with bios_rgn_p2.bin and also Z37_p1_3.20 with Z37_p2_3.20
8. If unsuccesful, repeat steps 3-6 while replacing patches1.txt with patches3.txt and bios_rgn_p1.bin with bios_rgn_p3.bin and also Z37_p1_3.20 with Z37_p3_3.20
9. Report the outcome. If all patches are unsuccesful, provide text and/or pictures of the messages that appear on screen during a normal Instant Flash and one during the security error.

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^^ To add to the above, please see the warning at the linked guide @Yuno - the reason why it's not done with stock modified BIOS is explained in bold red warning too (Which I assume applies to your instance since you probably didn't backup first to modify then reflash)

Hello,I have a ASUS Motherboard.I have this bios file from Asus, then i continued to mod the PROCHOT temperature with AFIBCP. But after selecting the file with AMIBIOS, then flash, the app froze and nothing happened. I try to Using the AMI tool AFUWIN: methods but it didnt work. What should ı do?

Hi guys sorry for my request but I'm very noob in this topic. I have a z68 extreme4 gen3 and get an already modded bios for my board by Lost_N_BIOS, for install it I need to follow the procedure on first page?

Zitat von Fernando im Beitrag #400

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Zitat von Stephen im Beitrag #399

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for install it I need to follow the procedure on first page?

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Yes!

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@Stephen - to add to the above, since I normally do not use UBU so probably did not use it for your mod BIOS, run BIOS through UBU but do not make any edits, then choose "save as mod name" then rename BIOS back to stock name, this way UBU will do what you mentioned.
If you aren't sure how to do that, let me know and I'll find your thread where I made you mod BIOS and do this for you and send new BIOS.

* Edit - I went to do those changes for you, and then checked stock BIOS vs UBU saved (non-mod) and it's same, and I don't see UBU message about removing Asrock protection either (Checked 1.69 and 1.72 version)
So this BIOS does not have that kind of protection in it, simply rename to stock BIOS name and flash

@Lost_N_BIOS:
Ok so your mod bios 2.30 for extreme4 gen3 is ready for direct flash I don't need to do nothing, only flash, right?

EDIT by Fernando: Unneeded fully quoted post replaced by directly addressing (to save space)

FWIW, this guide worked for me to flash my ASUS ROG STRIX X370-F GAMING motherboard and my ASUS FX502VM laptop (for the latter I had to extract the factory BIOS using 7-zip to remove the header). It's not too different to the AfuWin method, but that one makes my laptop freeze. Interestingly, placing the efi module from the Intel MEI system tools (FWUpdLcl.efi from FWUpdate\EFI64) in the same folder as the other tools let me update my MEI too. Not sure if there's any advantage over doing it in Windows, but maybe it's a nice fallback.