Hello @Unknownn 

Does this mean your ISP provides two types of internet connection? When using PPPoE or Static IP, is the Archer AX73 connected to the internet in the same way?

Who is your ISP? What if you connect a computer directly to the ISP modem bypass the AX73, and dial-up via PPPoE or set a static IP on the computer, will you get the same speed?

How to dial-up on a Windows computer? Check this.

How to set a static IP on the computer? Check this (be sure this is the static IP address you configured on the AX73 previously).

If you can get the same speed when using static or PPPoE on the computer directly, please help collect the following information for further troubleshooting on the AX73:

1. Please check and ensure all the other settings on the AX73 are the same when choosing static IP or PPPoE.

2. Show us the PPPoE settings on the AX73, you may mask the username and password to protect your privacy.

@Unknownn 

Thank you very much for getting back with the detailed info.

Apologies as I am running out of solutions on where to locate the exact issue. To assist and figure it out efficiently, I've forwarded your case to the TP-Link support engineers who will contact you with your registered email address later. Please pay attention to your email box for follow-up.