Is the W3600 and the X20 basicly the same?

@Bluestringer This forum is pretty much useless. I thought there was TP-Link techs here that monitored it and provided help and answers to questions, apparently not.

What could cause my upload speed to suddenly drop from mid 900's to the 20's. I'm on a 1gig fiber service and I had been seeing around 950 up and down. Three days ago I got a firmware update and it...

@terziyski Ok, that would be the upload, I'm assuming the download would be the speed from the internet to the main deco.

@xtimex On my Deco W3600 I can go into the app, select the client I want and it gives me the option for either auto, 2.4ghz or 5ghz.

When I open the Deco app there is a speed test button at the top. Which device speed is this testing, is it the speed from the modem to the main Deco?