@PerLar Yes, now it is working way better. I updated to the new driver version - and evything is at it should. I am still connected as AC mode, not AX. Big THANKS!

@PerLar Thanks, Yes that is correct. WiFi 6 and 5 GHz I have tried two different speed tests - same result

@PerLar Yes, it is 2402/2402 (Mbps)

I have a Win11 desktop computer with a new TP-link Archer TBE550E PCIe card. When testing internet speed, I have a OK download speed (400 Mbit/s), but only 5 Mbit/s on upload. When using my mobile...