@Lost_N_BIOS
"selected bios is not a proper bios" It's the standard message they show when you try to flash a bios earlier than the existing one.

I am able to flash the current bios over and over again with no fail.

Thanks @nnyymm - I'll see if I can find this so you can disable via RU
Wait, I see this discussed at Asus forums, and they say they do not block downgrading. Please zip for me your stock BIOS and the mod BIOS you are trying to use, so I can check it, maybe it's not proper BIOS and nothing to do with version. Or are you trying the stock unedited version (only renamed to flashback name)?
https://rog.asus.com/forum/showthread.ph...-downgrade-bios
I do suggest against the method linked on the last page there, but there it is also

Or, you can try this flashback hard mod (First image) - https://community.hwbot.org/topic/184577...ffee-lake-cpus/
Also discussed and other images here (different mod point done too, as I noticed and asked, see this page and next) - [GUIDE] Coffee Lake CPUs on Skylake and Kaby Lake motherboards (62)

Send me a BIOS Dump, with Universal BIOS backup Toolkit preferably, if not then use AFU, I want to see if reflash and flashback modules match stock BIOS or are different in onboard BIOS

@Lost_N_BIOS

Do you know what effect the '-rewrite' parameter has in regards to FPTW? How is 'fptw64 -f bios.bin' different than 'fptw64 -rewrite -f bios.bin'??

Thanks

@Lost_N_BIOS
I got stuck in these type of mobos flashing the modded bios.
eg:ASUS M5A97 R2.0 adn M5A97 LE R2.0
They are all AMD platform,and the bios's filename extension is CAP.So I use the way in the top of post but all failed.
So that means I need a SPI programmer???

@davidm71 - I believe rewrite erases the entire region first, then writes what you give it. Normal write operation only erases the bytes it sees as different and rewrites in the new data

plutomaniac can you clarify if I've understood that incorrectly - thanks!

@gloobox - those boards are also enough that they may accept mod BIOS directly through EZ flash, did you try already? If you tried and it failed, you'll need to use some version and method of AFU or the AI Suite method
I'm pretty sure the Valkyriestar method linked on page one will work for these boards with that exact AFU in that guide. Download the attached tools in that guide, and then follow the last spoiler for the flashing method.

I thought so, this board has USB Flashback, so that is the best way for this model >> M5A97 R2.0
Be sure mod BIOS file says "Aptio capsule signed" in UEFITool, rename the mod BIOS to M5A97R20.CAP, put on root of FAT32 USB and then press and hold the BIOS_FLBK button for three seconds to invoke it.
Smaller USB Stick is better, 128MB-2GB often work best, but you may need to try a few before you find one that works. Test your USB by flashing stock BIOS with flashback method, then you'll know if USB is compatible or not and if the file is causing the issue or not and not left wondering if the USB is the problem.
When doing the stock flash test, you also must rename the file to it's flashback name M5A97R20.CAP

@Lost_N_BIOS

So assuming all my descriptors are all unlocked that -rewrite command will flash the whole SPI 100% ME included?

Reason I ask is I used a programmer to reflash my bios with all descriptors set to 'FFF'. That will allow me to fptw flash the whole spi at my convenience?

Thanks

Thanks plutomaniac!

@davidm71 - yes , provided BIOS lock or SMI/SMM lock is not enabled blocking FPT write to BIOS region.
Since you have a programmer, you don't have to test to confirm, but you can test without rewrite first to ensure you're not given any error due to some blocked region.
If no error, then full -rewrite = flash programmer same/same

Ok thanks!

@Lost_N_BIOS
Thanks for your advise.
I try the old(2.00) and new(2.04) and middle version(2.01) of AISUITE but all failed(I even tried to shutdown the network before flashing following someone's paradox )~And I try AFUDOS(3.xx) and AFUWINX64(5.05.4),failed too.
About USB Flashback(M5A97 LE R2.0 don't get this function),it's pretty picky,and I had rename the bios file to M5A97R20.CAP.It couldn't be flashed the modded bios file all the time though changing many U disk but could be flashed the original bios file every time!
And owning to your contribution of "Grub Fix Intel FPT Error 280 or 368 - BIOS Lock Asus/Other Mod BIOS Flash",I can flash all the ASUS Z77 series successfully just once in a while! The method of afu could not always work for flashing modded bios in some ASUS Z77 mobos I had texted.And AISUITE sometimes don't works in ASUS Z77 mobos too.

I've downloaded a vanilla BIOS for my X370-PRIME PRO and used UBU to update the CPU microcode inside. I tried to use the latest "afuefix64.efi" from AMI's website to update the BIOS but I just get the standard "secure flash rom verify fail" error. This PC doesn't have Windows installed, which means neither of the methods advertised in the first post of this thread are available.

Is there another way to flash this modded BIOS?

@gloobox - yes, only this model has USB Flashback >> M5A97 R2.0
LE model doesn't have it - renaming BIOS to flashback name only works on the M5A97 R2.0 board with flashback.
If you can flashback stock BIOS on the M5A97 R2.0 board, but not your mod BIOS, upload your mod BIOS and I will fix it for you to it will work with flashback.
I know what you mean with AI Suite method, I never had any luck the few times I tested that either.

@DragonQ, for modern AMD boards options are VERY limited when it comes to flashing mod BIOS. Often only options are flash programmer or Flashback if the board has this feature.
You can try method linked on page one, search Valkyriestar and follow that link to the guide, download the attached tools in that guide and follow the flash method only in the last spoiler on that guide

Thanks! Here is the bios modded.I just add the nvme module in it.[[File:M5A97R20.rar]]

Zitat von Lost_N_BIOS im Beitrag #462

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@DragonQ, for modern AMD boards options are VERY limited when it comes to flashing mod BIOS. Often only options are flash programmer or Flashback if the board has this feature.
You can try method linked on page one, search Valkyriestar and follow that link to the guide, download the attached tools in that guide and follow the flash method only in the last spoiler on that guide

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@DragonQ - install windows temporarily on some drive. Or you'll have to get flash programmer like CH341A and SOIC8 test clip w/ cable if BIOS is soldered to board or U Type Flat chip IC extractor if BIOS is in a socket. If you need links to those items let me know.

@gloobox - yes, this is failing due to unsigned capsule.
To make this not happen, extract BIOS Body from capsule using UEFITool then modify that, then open stock.cap in hex editor, go to 800h location, then open mod BIOS body in another tab of hex, select all and copy, then on stock.cap BIOS at 800h paste the mod BIOS body, then save as flashbackname.cap
To do same with your current BIOS, what I did for file below, open the file in hex, go to 800h, select all of file from there to end of file (800000h length), copy and then past into stock.cap at 800h as mentioned above, then save as flashbackname.cap
Here is fixed BIOS - http://s000.tinyupload.com/index.php?fil...531816785177750