@Riley_S 

I'm pretty much ready to toss this TBE550E card in the drawer, it was getting 4Gbps to the router, then a couple days later it's 1.4Gbps on Win 11 Pro, router hasn't moved, desktop computer hasn't moved, no router changes, nothing in the way of the signal. That's pretty bad, about to put my Intel BE200 card back in, and at least even though it really had trouble with WiFi 7 in Linux Mint 22, it still connected fine on the AX band, with this card it's a bunch of nothing. I would say this card is still in Alpha zone, not even Beta zone ready yet. Maybe it will be worth using when it gets put into the Linux kernel and you make it's use consistent with WinBlows 11, ye I'm not a fan of this version of Windows, that's why my main driver for many years has been Linux Mint, which with my Intel BE200 card I can boot into either drive, the Linux or the Windows and all my hardware works, because this card isn't ready for release yet, I have to use a USB WiFi Dongle for Linux, that's not acceptable. Pulling the card out and tossing in the drawer right after I type this. My whole network is TP-Link and it has been fantastic, so I thought I would get the card to match my BE9300 A550 router, waste of money it seems.

  @Ramburner Try the driver that is in the post here :

Archer TBE550E won't connect with 2 channels on MLO network - Home Network Community

It is newer than any on the support site.

  @Riley_S I just installed the Archer TBE550E wifi 7 on my sons 1 year old gaming pc which is AMD based and it has windows 24H2 isntalled  i still cannot connect it to run on MLO network which i currently have enabled on my DECO BE85.  his pc keeps connecting to only one band at a time despite being on windows 11 24H2 and having all latest drivers installed...    i on the other hand have 3 year old DELL xps8940 with intel BE200 chip and windows 11 24H2 built isnatlled and i am able to connect to MLO network i can see 2 seperate bands connected screen shot attached below, you can see my intel BE200 intel based motherboard connecting to MLO perfectly, but seems like AMD is having issues, despite my sons pc being on windows 11 and 24H2 version of windows    

  @jake26 Try the driver in the link I posted above.  Fixed the connecting on just one channel issue for me.

here is the AMD based with archer TBE550E installed... this morning i had to force it on 6ghz band again. it was connected to 5ghz band only even though it was connected to MLO ssid . so again the TBE550E is not connecrting in MLO configuration, and i had to force it onto 6ghz band again..

  @jake26