Hi,

I have a Lenovo ThinkPad X1 Carbon running Linux Mint. I have been seeing significantly lower download performance so decided to buy the Archer T3U (not sure the hardware or firmware version). It seems it doesn't come with Linux support by default. I have managed to get the device working by installing the realtek driver from https://github.com/cilynx/rtl88x2bu.git version 5.8.7.1_35809.20191129_COEX20191120-7777. Unfortunately I still see half the download speed as I do from my mobile phone (iPhone) running the speedtest app.

speedtest-cli
Retrieving speedtest.net configuration...
Testing from Virgin Media Business (X.X.X.X)...
Retrieving speedtest.net server list...
Selecting best server based on ping...
Hosted by Livedrive Internet (London) [162.49 km]: 30.33 ms
Testing download speed................................................................................
Download: 139.03 Mbit/s
Testing upload speed......................................................................................................
Upload: 35.53 Mbit/s

Whereas I see 355Mbps / 35.7Mbps from the speedtest iOS app next to each other, next to my Netgear Nighthawk.

Interestingly the upload speeds are identical. This is the output I see from nmcli  d wifi list ifname wlx28ee5210625c

IN-USE  BSSID              SSID     MODE   CHAN  RATE        SIGNAL  BARS  SECURITY 
*       2C:30:33:D4:A1:8B  private  Infra  36    405 Mbit/s  98      ▂▄▆█  WPA2 
        2C:30:33:D4:A1:8C  private  Infra  4     195 Mbit/s  84      ▂▄▆█  WPA2 
        FA:92:BF:22:FC:9D  private  Infra  44    270 Mbit/s  72      ▂▄▆_  WPA2 
        F4:92:BF:21:FC:9D  private  Infra  6     130 Mbit/s  47      ▂▄__  WPA2

So I would expect to see all of that 405Mbps given your claim of 867 Mbps on 5GHz band

Thanks in advance