So i have been using Thunderbolt 4 with no issues for awhile. Seemingly out of no where, the thunderbolt 4 40gps ports arent working with anything i plunto them.
I already know others have had these issues and i have even had this issue with thunderbolt 4 with other systems. An y one else have any input on this issue? Seems to just be a thing of if it works it works, if not your sol. I havent seen to many tweakable settings for the ports either…
I’ve dealt with this at my work with Dell/Intel systems primarily. 85% of the time a Driver, firmware, or BIOS update fixes the issue. 10% have been cables. 4% have been bad hardware(CPU, motherboard, etc). Remaining 1% have to be gremlins or Intel trying to troll us lol
If you need good recommendations on cables my work usually buys cables from Anker, club-3d, infinite cables, or directly from corning(Fiber optic thunderbolt cables).
If that doesn’t fix it and you use windows device manager to see if it’s recognized there. If it is but not working then it should give you an error. If you are on linux I’d check udev or installing something like hardinfo for the same. You can post it here and I’ll do what I can to help narrow down the error.
Turns out even my ethernet ports got knocked offline so i have to disconnect everything from the back of the computer. Lets pray my board isnt damaged in some way.
RIP, that’s very annoying. I would make sure nothing else that’s attached to it is damaged and everything else appears to be working.
If I remember correctly, haven’t you had a lot of issues with your current setup?
Its been a long chain of different issues with several different systems. Up till now all of the issues have eventually been resolved either with hardware replacement or intense trouble shooting.
Sadly its looking like even at bios my ethernet ports are flickering even at bios with nothing plugged into them. Leads me to believe my board might be shot. Here is a quick video demo of what it is doing.
Do you think its shot? @wendell
I am about to test the nics in linux with a friend.
Even in linux no wired connection is seen despite it being connected. 
I’d try flashing the BIOS if you haven’t already just in case something with it is being funky. However the board is probably cooked. Hopefully still under warranty.
Theres actually a new bios update. I am updating to it now.
As expected,issue still persist. Guess somehow the nics are cooked.They are totally unresponsive.
this is a common issue on this board, unplug it from power for 5 solid minutes and then retry. its some kind of surge protection
@wendell Wendell I just disconnected everything from the system and it was still acting up… So i took it into my workshop and took out all cards but the 4090 and not only is thunderbolt working again, so are my onboard nics. …What?
This is a protection feature?
Hmmmmm… that’s very odd and you’ve made me curios. I’d like to dig into the motherboard documentation. Could you post full system specs?
Just looking at the picture. Wondering if you’re encountering a bug/spec limitation with PCI lanes going to the CPU or like you enumerated one of your add-in cards failed and triggered a protection feature. I would readd the cards one by one in the same slots they were originally until the error come back. Though reseating the cards could resolve the error or whatever caused it to trip. Which would make me think that it’s a bug at the BIOS/firmware.
I will need some time to write out a full list of all of my components because there are so many but i can tell you that i still often have usb devices drop out and sometimes one of my displays. The computer does act like it has to many things connected to it frequently, especially since connecting 11 monitors vs 9 despite getting a 4th gpu to help offset the load.
This is the oriehtation of the pcie cards now.
This might be related: USB4 consumes a lot of resources and can hinder PCIe enumeration.
Have the same mobo, original BIOS version, with 5x GPUs and 4x NVMe and some SATA.
At boot, PCIe enumeration often failed until I disabled USB4 in the BIOS, then it was all fine. I do not know if the symptom included flashing NIC lights.
I can live without USB4. The machine is working fine now under heavy AI load, so not touching it and not updating BIOS, but I suspect eventually a BIOS update will solve this.
For my use case i really need USB 4 and so far it seems to be working again beautifully after a long list of trial and error that is still going on to some degree. We are good to go now though overall.
