My download speed is 30mb and upload of 3mb and i use a internet extender with an ethernet cable into my pc. But when i am actually downloading a game or anyhting i get download speeds of no more than 4 mb at most. Why is this and how can i fix this?
So you are going
cable modem to router wifi
Router wifi to extender wifi
Extender wifi to ethernet
Ethernet to computer
This is what is known as bridge mode. It acts as a bridge for your ethernet to get from one side of the house to another.
I would say your extender is much too far from the router and your signal is awful if this is the case.
Use wifi analyzer from vrem software to determine what your wifi signal strength is like