Board has not been able to get any thunderbolt to work at all. even powered on before boot. tried AppleVTD still nothing. So clean vanilla/Monterey 12.4 with 500 efi/ Olarila.aml and only AirportBrcmfixup.kext for wifi. Any help would be Awesome. before the commute to another board a work around, or maybe TB3 card without header mod.
Send me iMac-Pro.modem.zip