tpPLC shows good speed between adapters but actual download speed is much less
I have 1gbps fibre broadband and am using the TP Link PA-7017. When I connect my laptop directly to my router using a cat6 cable the max download speed is generally around 600 mbps (I am following up on this with my broadband provider). I can see in the tpPLC utility that the max speed is being retained well across my Powerline adapters, see below.
I am using a cat6 cable (2m long) to connect my laptop to the top right adapter in the picture (device-9101). I can see that the negotiated network speed on my laptop is 1gbps, see below
Bbut my actual download speed is far lower. Generally it's only 120-150 mbps. So it seems like I'm losing 70-80% of the speed between the laptop and the adapter. I have tested this with two laptops and a cat5e and a cat6 ethernet cable. I have tested it when the adapters are both plugged into sockets in the same room. I have tested it without the 27A0 device. None of these changes has any effect on my download speeds. There are no other devices also downloading data at the same time.
Any suggestions on where the speed is being lost are appreciated. I have read the articles about factors that can affect the download speed but dropping from 550+ mpbs to around 130 seems like a big drop?