usb wi-fi adapter rate fluctuating heavily

[JustSomeNumbers]

So my general problem is my wi-fi adapter is fluctuating it's rate and I can't seem to find a way to get it to stick. A few hours ago it was reading 866Mbps(it -should- be 1100-something), and right now it's reading 585Mbps. https://i.imgur.com/JY6aI1W.png It's driving me crazy, I've got no idea what the problem could be. The router is less than ten feet away on the other side of the wall(it's an apartment, so no I can't just put a hole in the wall and run ethernet cable), and I'm the only one on this 5ghz channel. https://i.imgur.com/IAQgOvh.png

Router model is ASUS RT-AC66U with latest firmware.
Wi-Fi adapter is Realtek 8812BU
OS is Win8.1

Any ideas? I'm at a loss.

 

[bill001g]

Those number are negotiated between the router and the end device. It will try for the best it can get with few errors.

You are misreading the channel assignments you are overlapping another router. They are ranges of channels not just a single channel when you are using 802.11ac. You could force it to use only a single channel by setting the bandwidth to 20mhz but you would limit your top speed to 150 or 300. There can be other routers and devices like baby monitors and security cameras that do not show up on the scan also interfering.

You can never get above 866 because you nic card only supports 2 antenna/feeds. This is the scam people fall for all the time, the router may support faster rates but the end devices do not. People buy a router with huge number only to find it is not faster because the problem all along was their end device.

I am going to suspect your problem is the wall in between. The main difference between 866 and 585 is the way the data is encoded. 256-qam vs 64-qam. It does not take much to degrade the signal enough the route/device will drop back to the lower encoding. It likely is a combination of the signal loss in the wall and interference.

 

[JustSomeNumbers]

Those number are negotiated between the router and the end device. It will try for the best it can get with few errors.

You are misreading the channel assignments you are overlapping another router. They are ranges of channels not just a single channel when you are using 802.11ac. You could force it to use only a single channel by setting the bandwidth to 20mhz but you would limit your top speed to 150 or 300. There can be other routers and devices like baby monitors and security cameras that do not show up on the scan also interfering.

You can never get above 866 because you nic card only supports 2 antenna/feeds. This is the scam people fall for all the time, the router may support faster rates but the end devices do not. People buy a router with huge number only to find it is not faster because the problem all along was their end device.

I am going to suspect your problem is the wall in between. The main difference between 866 and 585 is the way the data is encoded. 256-qam vs 64-qam. It does not take much to degrade the signal enough the route/device will drop back to the lower encoding. It likely is a combination of the signal loss in the wall and interference.

That makes sense. Thanks. So I guess the solution is buy a better NIC?