to be more specific is hardware technology limitation

2.4ghz can reach so far as 300mbps but you aint going to get that full speed.

Lets factor in the bandwidth, the width of 2.4ghz wireless-n is 40mhz and while 5ghz width have 80mhz which double up the so call "highway" to allow more data to be transmitted. This effectively explain why there is so much different on 2.4ghz & 5ghz.

The fibre internet speed in singapore is hitting way over what 2.4ghz wireless can do.

In malaysia....only TIME fibre are doing that. Meanwhile if you are on unifi forget about it, majority unifi user are still stuck on below 50mbps

as mention you will not get 300mbps fully outta of 2.4ghz

is shared and not all wireless-N standard can give you that