I have TL_PA7020 powerline adapters connecting 2 rooms next to each other, on the same circuit, plugged directly into the wall outlets. The modem and router are in one room, my desktop computer in the room next door.

My internet service is 100Mbps, and over Wifi (or plugged directly into the router with a long Cat5 cable from room to room), I get that speed.

But when I use thePowerline adapters, my speed is half that, around 50Mbps. The PLC Utility shows the connection speed between the powerline adapters as nearly 200Mbps, so that seems fine.

I've tried all the usual advice: there are no other electrical devices nearby, adapters are plugged directly into the wall outlets, all the cables are Cat5, and so on.

Any ideas? These are Gigabit Powerline adapters, so 100Mbps should be easy. What else can I try?

Many thanks for any suggestions,

Dave