@TP-Link_Deco 

Hey,

1. Yes the X60 is working as a Router. I turned off 2.4Ghz from the Deco and the speed still drops and the wi-fi strength continues to drops. Yes there are a couple of walls.

2. Yes all three X60 are shown as Ethernet

3. I have tested on my iPhone and Laptops, it was poor performance on Laptops that alerted me there was some sort of problem.

Thanks

Any updates or resolutions to this?

I'm having a similar issue. My speed when connected to the Deco wifi is about 50% of what it is with a different router (Netgear Nighthawk). 

If I take the modem and connect it to the Deco, run a speed test; then do the same setup - connect the modem to the Nighthawk, run a speed test, it's almost twice the speed on the Nighthawk. If I go back to the Deco, speed is reduced to about 50% again. So I'm convinced it's the Deco, but how/why?

@manishpatel1971 

I have the same issue.  I have a 1GB internet line coming into the house (Virgin cable Network).  When I test the speed using the virgin WiFi and stand near the virgin router i get about 980Mb/s (expected).  If I connect via Ethernet cable to laptop to the Virgin router i get the same speed.  The speed remains the same when I turn off the WiFi from the virgin router and just test via Ethernet = 980MB/s

I connect my Deco X60 to the Virgin router via cable and ensure Virgin router WiFi signal remains off.  I connect via WiFi to the deco and cannot get more than 100Mb/s (standing right next to the deco router).  I connect a second Ethernet cable to the deco router and plug into my laptop and test the speed.  I am again capped to 100Mb/s.  My expectation is for the full 1GB/s.

I have also ensured that the deco is fully updated (latest firmware).  I have also tried this in BOTH modes on the Deco (access point or router) and I get the same result.  I have also tested on any combination of 2.4GHz and 5GHz (off or on)

So in short, it seems that in my case, I cannot get more than 100MB/s out of this device no matter the connection options (WiFi or direct by cable Ethernet).  I bought the Deco X60 because I was guaranteed faster than 1Gb/s speed.   I am getting 1/10th of the speed expected.

This seems to be a problem that is reported often in forums - please someone at TP-Link respond.  

@Briday 

I had exactly the same problem as you, but i found a fix for my situation. Hopefully it helps you (and maybe other?) too. I found out that i didn't had the problem with, for example, my Xbox Series X. Only with my Windows 10 PC.

This is what i did to fix it; I will try to translate my actions, because my Windows 10 is in Dutch. Go to Device Manager and then to your network adapter. Open the properties, go to advanced, go to 'MIMO power save mode' and set it to 'No SMPS'. After that, my internet speed was fast again.

@TP-Link 

hi Tp Link

few weeks back I installed the x60 and manage to get about 800mbps. Recently when I test the speed. It constantly giving me below 100mbps. 
 

I tried all the method on the community port but couldn't resolve the issue. 
I did a restart deco this afternoon and the speed gone up to 400mbps. But after a few hours it dropped back to 90mbps. 
 

I did the lan speed test to verify and it's 800mbps on lan. 

I also have issues with wifi speed dropping after a few hours. Have 3* x60 all connected with Ethernet to central switch. Fiber connection is 500/500 and that's the speed I got at first over wifi but after a few hours it drops to about 40-50 Mbps. A full restart of all Decos have helped but that's of course not s viable solution. One more thing, when you fix this with new firmware... Please also make sure we can turn off DHCP in router mode!!!

My issue is that I am getting decent speeds - 800 ish with a gig and a motorola 8611 modem - but internet is laggy and Tvs lose streams. I have a nest wifi (wifi 5) that I was trying to improve on (only getting 400 DL on a gig wire 10 ft from router) that is snappy and touble free. The speed just sucks.