eGPU nvidia + AMD Ryzen AI 9 HX 370 w/ Radeon 890M

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Windows 11 Pro
64.0 GB
AMD Ryzen AI 9 HX 370 w/ Radeon 890M

I upgraded from a AMD motherboard to the new AI AMD chip.

Nvidia eGPU worked flawlessly before after installing the framework drivers. Now not anymore. thunderbolt from egpu, plugged in enclosure charges the laptop but cardis not recognized

I already re-installed:

gpu doesnt show up in device manager and nvidia installer doesnt want to re-install because it cant see it either.

Again worked flawlessy before replacing motherboard.

booted into BIOS but couldnt see anything specific to USB4 / thunderbolt that needs to be enabled

Should I re-install my windows since I changed the chip?

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On thunderbolt there is a security (pre-desktop autneitcation) or whatever. Basically doesnt enable those unless you authorize and stuff.
I have never owned a thunderbolt .. anything. I imagine that a balloon will pop up saying “click here to authorize this and connect”. Which might be borked on AMD due to AMD reasons.
Change that to “no security”, so the device functions immediately after power on.

I dont think you need to reinstall, but maybe.

Also try plugging them into the main board USB-C directly rather through expansion cards.

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thanks, Xavier. When I plug in the cable its charging so I would assume that something works. In the “Thunderbolt Control Center” manager nothing shows up though.

I reinstalled the whole system using system reset and not keeping any data.

but no luck. This is really annoying since it worked before and I heavily rely on being able to use external NVIDIA GPUs for 50% of my work.

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Did you try the BIOS settings?

Could be a broken cable? I know those are like, super sensitive. And again try plugging it straight into the main board USB-C.

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thanks @Xavier_Jiang I cant see any options for the above in my bios.