Tweak the router

I just upgraded from 50/50 to 75/75. When I surf the internet on my computer, most of the pages load quickly. But when I try & surf the internet on my smart HDTV, the pages take forever to load. Why is it that the pages load quickly on my computer but not on my smart TV?

I have the MI424WR Rev I.

Are there settings on my router that I can tweak to optimize the speed?