@Acastello 

I think your speed is limited by incorrect cables towards or from your power line.

You need CAT 5E or higher.

My guess is you are using a CAT 5 and because of that your speed is limited to 100Mbit max.

A friend of mine had the same issue between his X60 and a switch. Because of the CAT5 between his main deco and switch he had two deco units with a limited speed of 100 Mbit and one (his main) with 300 mbit

Hello @JJ10 . Thank you for your answer.

I'm using CAT 6 to connect telecom provider's router and P6. I get a speed around 400Mb on living room from the first Deco P9, that is connected to a router. The problem are on second and third unit. Maybe is something related to power line, as you said.

I read that Deco P9 not only use power line to delivery you internet connection but use together wifi between units, as a bandwidth redundancy (power line + wifi). 

Does anybody here knows something about that? 

@TP-Link 

This is a print screen of the first satellite Deco, in the middle of the house. I thought that Deco worked throught powerline but i'm noticing that it combines wifi signal with powerline. My internet provider cable arrives at the living room (main Deco).

Is it possible to change the second Deco (in the hallway) to be de main Deco? Will this make it work at a better speed? 

@starmanj 

@TP-Link 

the main Deco needs to be connected to the ISP router by cable all the time.

Yes, it is.

So did you want to use the first satellite Deco as the main Deco?

No. I asked because I thought that this could improve my network speed.

Have you tested the Ethernet speed directly from the second and third Deco units?

Yes. I have 500Mb with my provider.  Here are the speeds on Deco:

- Main deco connect to ISP router:  around 450Mb (if have only 5Ghz network turned on). If I turn on 2Ghz, I have 90Mb of speed /80Mb upload.

- first satellite (main hall): 90Mb download / 80Mb upload

- second satellite (bedroom): 90Mb/ 80Mb upload

I tested using my ISP speed meter site and Okla. Results have small variations. 

Thanks,

Andre

@TP-Link (please, take a look first on my previous post)

Do you think it is better to improve network speed,  turnoff 2Ghz signal on Deco P9?

Thanks

@TP-Link 

Hello,

Did you test with an Ethernet connection to the Deco directly, or with 5ghz enabled only? Or with both 2.4ghz and 5ghz enabled?

Yes. Those are results with both 2.4Ghz and 5Ghz turned on.

When I turnoff 2.4Ghz and restart Deco, I have 400Mb on main Deco and 90Mb on second and third.

My guess is that Deco turn off only 2,4Ghz on the main router after you move toggle (2.4Ghz tuned off) on the mobile app but satellites still have 2.4Ghz network available.

No solution yet to this problem?

My Google TV is just a few meters away from my M9 but still connects with 2.4ghz, making streaming in 4K unstable at best.

Tp-link, this is a real issue for a lot of your customers!

I was think to upgrade to X90 but might change system instead.