[ConservativeMind]

Your range extender’s physical Ethernet port says this in the specifications:

Ethernet Port: 1 10/100Mbps RJ45 Port

You don’t have a 1000Mbps port, so your upstairs computer will never self-select for 1000Mbps.

[Oshkalaboomboom]

That’s probably my bottleneck. I will have to find a range extender with a high speed output jack then email TP-link and ask them why they would do something so stupid.

[daniel1212]

I think ConservativeMind has the best answer so far. Advertised speeds refer the Ethernet so you need to test your speed using a Ethernet directly to the router. And note that range extenders reduce speed, and wireless does far more.

See answers to Do WiFi repeaters/range extenders reduce Internet speed?