Comcast increased DL speed to 105; can my MOTOROLA SB5101U utilize that?

redwing634 · Apr 17, 2014

I currently have my home network on a MOTOROLA Surfboard SB5101U. Previously I had 50Mbps from Comcast but they just increased it to 105Mbps. The question is, will my modem make use of those extra speeds, or is it capped out at a certain point? Likewise for my Linksys wireless router (which I believe is the Linksys WRT54GL)?

COLGeek · Apr 17, 2014

The router can only handle wireless G rates (54 Mbit/s) The cable modem can handle download speeds up to 38 Mbps. Typically though, if you upgrade to a higher level of service, Comcast will replace your current router with one that can handle the higher speeds (at no additional cost to you).

You would need a DOCSIS 3.0 modem to support the higher data rate.

http://www.motorola.com/us/SURFboard-SB5101U-Cable-Modem-DOCSIS-2.0/SB5101u-SURFboard-Cable-Modem.html

Ellicott · Apr 19, 2014

You need to replace your SB5101U Cable Modem because it is DOCSIS 2.0 modem and only supports up to 38 Mbps, not 105 Mbps. $81 Motorola SB6141 modem seems a good one.

Your Linksys WRT54GL router may be another issue because it only has four 10/100 LAN ports that usually support 50 to 70 Mbps speed totally. If you have 4 computers connected to the router and access to Internet, then these four computers share 50 to 70 Mbps bandwidth. It might end up 12.5 to 17.5 Mbps bandwidth for a computer from time to time. Using a gigabit router like ASUS N66U, you can utilize all 105 Mbps bandwidth.

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Comcast increased DL speed to 105; can my MOTOROLA SB5101U utilize that?

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