Mikrotik 951G cuts Wi-Fi speed to 3 mbps, what's the matter?

Question

WiFi

I sinned against the provider, but through the cable the maximum speed is 50 mbps, via wi-fi it stopped rising above 5 mbps. I updated the firmware to a new one - everything is fine for three days, now again. Played with Frequency, transmitter power, Data Rates and more. Did not help. According to Btest too, no more than 5mbps.
Resetting the settings and restoring the old ones also did not help. CPU usage does not rise above 5%.
Where did I screw up? I ask for both general and private advice. Thank you!

Answer 1

and with what speed do you cling to mikrotik?
did not think to torment all the same client computer.

Answer 2

Is there a lot of interference around?
Try turning off N leaving only G on wifi - look at the result.

Answer 3

The Mikrotik console also has a wonderful utility for checking channel load. Scan and choose the freest one. Perhaps some device nearby is phoning the channel.

[[email protected]test] /interface wireless> spectral-history wlan1 range=2412-2472

And read habrahabr.ru/post/179149/ , it might help.

Answer 4

Run nirsoft.net/utils/wireless_network_view.html for a few days
and determine the freest channel based on the results of its work.