RT-AX86U lost WIFI speed.

[Tech9]

Most of your wireless devices are connected to the slower 2.4GHz band and only 1 to the 5GHz band. Your router is most likely on Auto with Smart Connect. Set manually 2.4GHz band to Ch.6 @20MHz wide and 5GHz band to Ch.36 @80MHz wide, reboot and test again.

 

[RouterOtter]

Most of your wireless devices are connected to the slower 2.4GHz band and only 1 to the 5GHz band. Your router is most likely on Auto with Smart Connect. Set manually 2.4GHz band to Ch.6 @20MHz wide and 5GHz band to Ch.36 @80MHz wide, reboot and test again.

those setting are located in same tab as the logs i posted?

 

[Tech9]

No. In Wireless menu, General tab. You may want to read the User's Manual.

https://www.asus.com/networking-iot-servers/wifi-routers/asus-gaming-routers/rt-ax86u/helpdesk_manual?model2Name=RT-AX86-Series-RT-AX86U-RT-AX86S

 

[RouterOtter]

Most of your wireless devices are connected to the slower 2.4GHz band and only 1 to the 5GHz band. Your router is most likely on Auto with Smart Connect. Set manually 2.4GHz band to Ch.6 @20MHz wide and 5GHz band to Ch.36 @80MHz wide, reboot and test again.

my setting isnt on auto smart connect.
2.4GH i set Channel Bandwidth to 20MHz, Control Channel 6
5GHz i set channel Bandwidth 80MHz, Control Channel 36

rebooted router. made sure setting stick after reboot.
did test. on two devices. still the same slow speed Wifi only. .

 

[Tech9]

If you're not using SmartConnect - you have disabled it manually, the default setting is Enabled. Look at your Wireless Log again and find why your devices connect to the slower 2.4GHz band. I can't help you any further. I see no issue with the router so far. On your screen shots - the only device connected to the 5GHz band had excellent signal and PHY rate.