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I just got a Powerline adaptor that supports Gigabit Ethernet and 1200Mbps, since my WiFI connection was inconsistent (despite being quite strong). For some reason, it delivers MUCH slower speeds than my WiFi connection. My WiFi here delivers a steady 270Mbps, while the Powerline delivers around 45~50 Mpbs (have up to 1000Mbps from my ISP, and this is with a 5G ac WiFi). I would hope I would get 500Mbps, as I get from Ethernet cables connected directly to the router. Both adapters are connected directly to power with no strips or anything. I'm pretty sure they are on the same circuit (they are on other sides of the same wall). I'm using TP-Link adaptors. I would just drill through the wall and wire the Ethernet directly but this is a rental apartment and I don't want to drill through walls here. What could be causing this?