ARRIS Surfboard S33 DOCSIS 3.1 Modem — 2.5Gbps Ethernet, Works with Xfinity, Cox & Spectrum

Overview

The ARRIS Surfboard S33 is a DOCSIS 3.1 cable modem paired with a dedicated 2.5 Gigabit Ethernet port. It is designed to handle modern multi‑gigabit plans, delivering fast, responsive performance for streaming, gaming, and large downloads. Owning the modem can help you avoid ongoing rental fees from your provider, potentially making it a smart long‑term choice for households that expect plan upgrades.

Note that this is a modem only device. You will need a separate Wi Fi router or mesh system to create a home wireless network. The S33 works with popular providers such as Xfinity, Cox, and Spectrum, making it a straightforward upgrade for many homes that want to upgrade their connectivity without renting equipment.

Core capabilities

• DOCSIS 3.1 performance supports cable plans up to 2.5 Gbps for fast downstream and upstream throughput
• Dedicated 2.5 Gbps Ethernet port connects directly to a router for high speed wired performance
• Compact, modern design with visible LED indicators for power, upstream, downstream, and online status
• Easy setup process: connect coax, power on, activate with your provider, then add a router for Wi Fi coverage
• Modem only: requires a separate Wi Fi router or mesh system to create a home network

Real world use and setup

In real life, the S33 can support busy homes where multiple devices stream, game, work, and attend video calls. With a capable 2.5 Gbps wired link, you may experience smoother transitions between activities and faster file transfers when your plan and equipment align. The combination of fast wired speed and a compact form factor makes the S33 a practical upgrade for living rooms, home offices, or media centers that crave reliable connectivity.

• Potential benefits include enhanced streaming quality, reduced buffering, and smoother online gaming with less bottleneck at the modem
• By owning a modem, you may reduce monthly rental charges depending on your provider and plan
• The compact footprint helps keep entertainment centers tidy while leaving room for a router or router stand

Setup tips and notes

To get started, attach the coaxial cable, plug in power, and contact your provider to activate the modem. Once activated, connect a Wi Fi router to the S33’s 2.5 Gbps Ethernet port to extend wireless coverage throughout the home. Remember, this device is a modem only and does not include a built in Wi Fi router.