I also tried connecting to 5GHz Wi-Fi from a Huawei ISP, and the speed dropped like that.

@David-TP Everything works on my phone, even on the router extender of the other brand, there were no problems. Oh yes, and previously I used Ax12, but I thought because this TX55E needed 160Mhz I...

I just bought a PCIE TX55E Adapter, but I found a problem where the 5ghz Wi-Fi won't connect. My main router uses Archer AX73 US Version 2. At the beginning, since it was turned on, it was connected...