Hi , 

I have AC750 Wireless Router Dual Band ( Archer C20 ). In my home, I have an ethernet cable that if I plug in the laptop directly, I get 300 Mbps but if I plug the same Ethernet cable in the Router mentioned above, I only get around 100 Mbps. I searched the datat sheet and I can see the below: 

But If I check the Wifi Settings, I can see the below: 



Then, how can I get the 300 Mbps Speed on the Wifi signal out of the router ? 

Data sheet: 
Archer C20 | AC750 Wireless Dual Band Router | TP-Link United Arab Emirates