ASUS Thunderbolt EX 4 + Pro WS B850M-ACE SE - NVM31 Downgrade?

[mindw0rk]

I got this card with a recent firmware and realised that my TB1 devices don't work with it.

I would also love to get the old firmware to downgrade to.

My hardware:
* ASUS Pro WS B850M-ACE SE
* ASUS Thunderbolt EX4

Ping @Jiaszzz_ASUS 🙏

[Jiaszzz_ASUS]

Hello @mindw0rk 

Thank you for reaching out to us.
Since it requires verifying the specifications by confirming the serial number, which is not suitable to share in a public comment, I DM you earlier.
Kindly check and share the requested information at your convenience.

Thank you.

[skaldem]

Hi @Jiaszzz_ASUS I would also love to get the NVM31 firmware to downgrade to. My current Hardware is Asus ROG z790f on Bios version 3001 and im also using the Thunderbolt 4 EX .

[mindw0rk]

I received the firmware downgrade tool from @Jiaszzz_ASUS , thank you so much!

However, even after the downgrade, I couldn't get the Apple Thunderbolt Display to show any display output. USB devices (including the hub, facetime camera, audio speakers) and the NIC all seem to work, although only when connected from boot - hotplugging doesn't work.

I have since read elsewhere that Apple Thunderbolt Displays have issues working with Titan Ridge controllers. I guess there's even less chance that they could work with Maple Ridge controllers like this one (even with NVM31) 😞