ThunderboltEx4 NVM31 downgrade tool

[Pacecar]

Hi there - Asus recently had a tool that would allow the downgrade of firmware on their ThunderboldEx4 card from NVM36 to NVM31 to support Thunderbolt 2 devices, however the tool is no longer available. Would anyone kindly have a link to the tool?

Thank you!

[daproducer]

It appears that after reviewing posts about the downgrade tool to address the Intel issue, which resulted in lack of support for Thunderbolt 1/2 following a BIOS update, you can offer assistance. I own an Asus ProArt Creator X570 motherboard, and this issue has brought my studio to a halt; I urgently require this solution.

[johnpaul134]

FYI, the firmware downgrade utility file that Jiaszzz_ASUS sent me enabled me to use my universal audio apollo 8 interface with thunderbolt 2 and a thunderbolt 3 to 2 adapter with my ROG maximus Z790 formula.  

[KedarWolf]

@Jiaszzz_ASUS Can I DM you my motherboard model etc. to get a downgrade EFI file. The one provided to me gives me an unsupported platform error. 😞

[hackej]

Hi!

I have a Z690 Pro Art Wifi mb and I am still on an old BIOS due to this issue with my Motu and Focusrite TB audio interfaces. The latest BIOS for Z690 Por Art is now "ProArt Z690-CREATOR WIFI BIOS 3802".

Is there a downgrade tool that will work if I would upgrade to latest BIOS and then use the downgrade tool?
Can you send me some info?

Regards
/Hackej

[KedarWolf]

If it helps anyone, on my ASUS X670E MB, I'm not supposed to be able do downgrade the Thunderbolt firmware if I've updated to the newest BIOS.

What works for me after upgrading to the newest BIOS, is downgrade with USB Flashback to an earlier AGESA like the 1709 BIOS, then upgrade from BIOS with EZ Flash to the one I want to run, in my case, 1904, then the downgrade tool works for me. Plus it fixes PC being buggy just downgrading directing from newest to 1904.

I think it gets around some things not downgrading correctly like the AGESA and firmwares, etc.