- Oct 20, 2003
I'm still using my SB6121 (DOCSIS 3.0) from 2012! The fastest internet plan I had from Comcast was around 200Mbps I think, but I've been on the 100Mbps plan for a couple of years now. I don't see myself changing that anytime soon, especially now that we have data caps and internet prices aren't getting any cheaper.
One possible motivation to upgrade (which again has exactly zero to do with DOCSIS) relates to the modems available up/down channels.
A 3.0 modem with 24x8 channels vs the 6121's 4x4 would provide a significant bandwidth increase. Debatable if it would make your internet surfing feel any snappier although big DL's would likely complete sooner.
All the 3.1 modems I've seen are 32x8 which IS faster no doubt but think of it this way ... it's like a 24 lane vs a 32 lane highway. Wider yes but those extra 8 lanes make no difference to traffic flow.