I have a Motorola SB5120 cable modem. My provider is Atlantic Broadband in North Miami Beach. I've had this modem for over 5 years and has always worked the same way. Even in 2 different locations. The connection is fast and all of a sudden it pauses. For example, I'm watching a YouTube video and you can see the loaded part of the video loading very quick until all of a sudden it stops. Changing the video quality (higher or lower) makes the movie continue loading. Another example is file downloads. It doesn't matter how big or small the file might be. I'm downloading and boom, out of nowhere, it stops. Sometimes I have to restart the download 5/6 times before it finishes. Now with all the video content being delivered through the web (Roku, Netflix, HBO Go, Xbox, etc) it is getting very frustrating for the buffering to appear.
I have download speeds of 12 mbps and various speed test throughout the day confirms it. I also download files at over 1MB per second, so it doesn't sound like speed is the issue.
My question to you is. Can it be the modem? Is it possible that modem doesn't handle those high speeds? Maybe it's defected? Maybe I can modify some of the settings in the modem. Or should I just get a new modem?