I have an AC1900 usb 3.0 adapter and an R9000 router. These devices are only getting a 54 mbps connection to each other. Support had me change my security mode, even though it was already WPA2, and flip through various channels on the router. Nothing helped. Is there anything else I can try? I have phones and tv's on the network that are all getting the "correct" speeds. The "physical link" in Netgear Genie which only shows 54mbps. It should be much higher. Also as far as actual internet speed goes, I am getting 75+ up/down at the router and only 20 up/down through the adapter if I'm lucky. I am on Windows 10 64 bit, and the adapter is in a USB 3.0 port.