Over past few weeks, my routers wifi performance has dropped from 100-150Mbps to 10-15Mbps. There has been couple of firmware updates recently and I just upgraded to latest one. I have 2.4 ang 5 Ghz networks with same SSID in use, disabled legacy but what other settings could be tuned for better performance? My laptop is now connected with cable, so I get the speed I used to get via wifi. Router speedtest gives me about 250/70 speeds
I have selected free channels for both frequencies, no help. There are a lot of neighbours wifis that might interfere, but channels are not overlapping now. Tried 20, 40 and 80 channel widths too, no help.