Okay so i have xfinity high speed internet, but i dont have the greatest router. The router is a Xfinity tg682 which has a speed of up to 150 mbps. the router is a 2 in one router/modem. When i use my downstairs desktop, it makes the laptops wifi very slow. I also have a belkin play wireless router, which has a maxium speed of 300 mbps. I was wondering, if i used both routers would i have a maxium speed of 450? please explain, my parents are getting mad when i use my desktop cause they cant connect to the internet, so i am wonder if adding the second belkin router would help this issue at all, any help would be great!