I have hired a 1gb speed connection, however the maximum synchronization speed of my powerline adapters TL-WPA7510 does not exceed 100mb. My powerline kit has gigabit ports, I am using a cat 6 cable, the adapters are directly connected to the wall, the electrical installation is 10 years old and although it is true that the powerline receiver is two floors away from the transmitter I do not find reasonable loss of 90% of my internet signal. Even more so when the tplink app shows me that the adapters communicate with each other at a speed close to 400mb. Why do the adapters talk to each other at 400mb but are not able to take my internet signal at that speed? Please could you give me some advice to improve the synchronization of my kit Or is it a problem of operation?