Weird Internet Problem

A few days ago, Google Chrome started slowing down for me intermittently. Well, not just down, it'd hang at "sending request" and then say various websites weren't available, from the New York Times to GWJ.

However.

I can access Steam with apparently no trouble, scanning the news, downloading games and playing multiplayer. The same goes for XBOX Live. The problem seems to be largely centralized to my web browsers. I've tried Firefox, Chrome, IE, all randomly vacillate between normal speed and ludicrously slow. Any ideas what might be up?

EDIT: Restarted the router and the modem, that seems to have fixed it.

Was going to say that it sounds like it could be a router problem to me. Glad it's been resolved.