My modem is working reasonably well while connected via cable, but lately, it's having issues when connected to wireless 2.4 Ghz mode. The speed is very slow and it's around 11 Mbps via Windows Network adapter information. Even after I manually to change channels (I tried them all) at best, I can get 65 Mbps for a few seconds only and then it drops down to around 5.5 Mbps.
I am now resorting a USB Network adapter so I can use the 5 Ghz band. So far, it's fine. But 2.4 Ghz is still an issue.