@TonyReilly 

Hi, thanks for all the details.

Just follow up, what is the link speed on your computer or phone when you are testing the wireless speed which is no more than 360M down? Have you confirmed this on different wireless clients? Here is a guide to confirm the link speed:

https://www.tp-link.com/support/faq/2265/

Please clear the bandwidth on your QoS settings and leave it on auto, then reboot all the Deco devices to confirm again.

BTW, what is your detailed network layout? How are the modem, deco devices connected to each other? When you test the wireless speed by connecting the computer to the main Deco, leave the other Decos disconnected, then confirm again.

Thanks.

@TP-Link_Deco 

I'll get that all to you over the coming days. 

Current link speed on my phone is 780mbps.

Network layout:

1gig Modem (Bridge mode) -> Main Deco via Ethernet. Slave Deco via mesh. 

Nvidia Sheild into main Deco 2nd Port

I've a few smart home devies (heating, security) into the ethernet ports in the modem. 

Is that enough?

@Saurabh_S  @TP-Link_Deco 

Just following up on this. I've done everything you've suggested and the speed is still being limited. 

The main deco to the modem (in Modem mode) is, on average, 920mbps, but the wifi is still 360mb or less, on every device I've tested it on.

Please advise.

@TonyReilly 

Hello,

Thanks a lot for all the details for now. 

Our engineer will email you, if you are willing to do further analysis, please check your inbox and respond.    

@TonyReilly 

I upgraded last week (I got some X20s so the M5s aren't as critical) and glad to see they are working beautifully.