From: »
www.amazon.com/ARRIS-Mot ··· 04XC6GJ0Internet download speeds up to 172 Mbps and upload speeds up to 131 Mbps based on your Cable provider service
What does your speed test max out at? It should be fine for 110 Mbps down / 20 Mbps up.
I have an SB6141, the newer model: »
www.amazon.com/ARRIS-Mot ··· title_ceInternet download speeds up to 343 Mbps and upload speeds up to 131 Mbps based on your Cable provider service
Note that it is a modem
only, not a router.