RT AX86u PRo 35mbs top dl speed

[laptop]

I have RT AX86u Pro, I have rebooted via software and done a hard reset. I only get 35 to 52mbps via WiFi both 2.4or 5 G and direct ethernet cable. I have replaced the modem from by ISP (cox) service provider. No major effect?
Added information: DL is around 35 to 38 mpbs and UL is 50 to 53mpbs incase that adds anything to get an answer.
Any suggestions. I have the orginial set up which was a CP from the post that I got from the forum here.

 

[bennor]

It would help if you can provide more information.
What is your broadband plan's advertised speed?
What firmware is the router running?
What is the router connected to upstream? (make/model of the Cox modem, router or gateway)
What speed do you get if you connect a gigabit capable ethernet port computer to the Cox modem or router?
After performing a hard factory reset did you manually reconfigure the router or did you import a previously saved router.cfg file?
Do you have any other features running on the router like AiProtection, AiCloud, QoS, USB hard drive attached to router, etc.?
What specific troubleshooting steps have you tried?
Sounds stupid but have you tried replacing the Ethernet cable between the Asus router and Cox modem, router or gateway?

If you haven't done so already, use the site search feature to find other past discussion on slow broadband speed with Asus routers. For example this post this morning in this same subforum:

RT-AX86U Pro limiting upload speed.

This is the third Asus router that has worked fine for the first few months before the upload speed begins to degrade. Right now I'm averaging 950 down and 20 up from speed tests on wired. Wireless is just as bad. No amount of resetting, NVRAM clearing, cable buying, or firmware shuffling has...

www.snbforums.com

 

[danlat1415]

Is that 'download' speed from internet, or is it file transfer speed?
If it's file transfer speed, then 35-55 is normal over WiFi.

If it's download speed from internet (speedtest.net) then you'd need to check settings.

Suggest doing a reset of both router and modem. Sometimes modem speed can get stuck, so turning off for 5-15 minutes can reset your connection with local exchange to pick up a better incoming speed.