I have a DIR-655 router, with a Motorolla Surfboard 6120 Modem, and a 3000 kbps download and 400 kbps upload cable connection. I've tested my connection speed hundreds of times and it is always 20 mbps or higher. However, my streaming video sucks. Youtube, Apple Trailers, Hulu etc. They all buffer really fast for about 10 seconds or so then fall flat on their face. It isn't my connection speed so I'm thinking it is my router, I have an IMAC using wireless N to the router. I have full signal as well. I've tried resetting router to defaults and still no joy. Please help with the configuration.