Getting low speeds through wireless

[Berzeker]

So I just upgraded my internet from 30 Mbps to 100 Mbps (my ISP actually provides 120 Mbps because of any loses that might occur). When I had 30 Mbps always got 29-30 Mbps through wireless, now that I have 100 Mbps I get around 30-40 Mbps (using a ethernet cable I get 120 Mbps).
I searched in the router configurations and it claims to be using 802.11g/n with a rate of 150 Mbps, Windows shows that is using 802.11n but with a rate of 65 Mbps.

The router is provided by my ISP, and I found in forums from my country many people that have the same problem but no solution. I connected my laptop to a different router (bought in a store) and it shows 150 Mbps rate.
What I found confusing is that if it is using 802.11n why does Windows shows a 65Mbps speed because even if it was using 802.11g it should be 54Mbps.
Can someone explain this? and hopefully know a solution.

 

[hang-the-9]

Your connection speeds depends on many factors, distance to router, interference on the band you are using, quality or router and wifi card.

If your other router gets a better connection, use that one.