Do I need a new modem? - Time Warner Internet

This question is about "Do I need a new modem?", with Time Warner Cable internet and apps. I have a Motorola SB 5101 which I have had for many years. I am not sure if I need to replace it since I have the same desktop system I did when I first has this modem or exactly what "tier" I am on or what modem would work with my old system.

Do I need a new modem??