Dual band modem issue
Moved to a new home 1 year 8 months ago.....have the 2.4ghx/5ghz modem router supplied by cox, on the second one. I have numerous laptops that have 802.11N wifi cards that worked great at old home 7 miles away. With the dual band router wifi access point we have now I am getting horrible performance out of the 2.4 ghz band. Under 40 Mps, when I have the 300 Mps plan. Is the modem capable of running acceptable speeds in the 2.4 band or am I going to have to replace a bunch of network wifi cards with 802.11ac cards?
If so then what it sht point of having the 2.4 gig band?