Trouble with internet

patriots10

Honorable
Sep 21, 2013
28
0
10,530
I've built my PC about four months ago and when i have it plugged in through an Ethernet cable it only gets one to five mbps download speed but when i use my brothers laptop(wireless) and test the internet speed with the same website I am getting 10-15mbps download speed. We are paying for 12mbps and how come my wired speed is much slower than the wireless speed?
Any help would be appreciated
 

patriots10

Honorable
Sep 21, 2013
28
0
10,530
Is there anything i can do to my computer that can solve this? I've had a router before that has done the same thing with the same computer, fast wireless and slow wired