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White vertical cable modem with two Ethernet ports, compact rectangular shape

ARRIS

ARRIS Surfboard S33 DOCSIS 3.1 Cable Modem 2.5 Gbps Ports

SKU CH-JR5D-AJ6CF

A DOCSIS 3.1 cable modem with 2.5 Gbps Ethernet ports for multi-gig internet plans

  • Product typeCable Modem
  • DOCSIS 3.1 technology delivers 10x faster speeds than 3.0
  • 5 Gbps Ethernet port supports multi-gig internet plans up to 2.5 Gbps
  • Certified for major US providers including Xfinity, Cox and Spectrum
  • Own the modem and save up to $168 per year in rental fees
  • Compact 5.14 x 1.8 x 4.74 inch design fits any setup

ARRIS Surfboard S33 DOCSIS 3.1 Cable Modem

The ARRIS Surfboard S33 is a DOCSIS 3.1 cable modem built for residential broadband. It delivers up to 2.5 Gbps maximum internet speeds through one 1 Gbps and one 2.5 Gbps Ethernet port. The modem uses 4 OFDM channels and is certified for major U.S. providers including Comcast Xfinity, Cox, and Spectrum. It replaces rented equipment to reduce monthly fees.

Ideal for owners replacing rented modems

This modem suits subscribers of supported cable providers who want to stop paying rental charges and gain multi-gig capability. It works with existing routers and wired devices via Ethernet. Buyers whose ISP requires a different DOCSIS version or a gateway with built-in Wi-Fi should look at other options. Households needing telephone port integration will not find it here.

2.5 Gbps maximum throughput decides fit

The single specification that determines suitability is the 2.5 Gbps maximum internet speed rating. If your current or planned service tier exceeds this limit, the modem will bottleneck the connection. If your tier falls at or below 2.5 Gbps, the S33 matches the provisioned bandwidth. Confirm your provider's supported device list before purchase.

How it compares

Measured against everything we stock in Cable Modems & Gateway Routers, at today’s prices. Recalculated every night.

Price $274.99
Pricier than about 80% of the 122 comparable items (median $120.99).

Specifications

Product
Product typeCable Modem

Questions about this item

Should I choose the 1 Gbps port or the 2.5 Gbps port for my router?

Use the 2.5 Gbps port to reach the modem's full 2.5 Gbps maximum internet speed; the 1 Gbps port caps throughput at 1 Gbps.

What does the 2.5 Gbps maximum internet speed mean for my home network?

It is the peak downstream rate the modem can deliver from the cable line; actual throughput depends on your plan, router and connected devices.

How does the DOCSIS 3.1 standard limit real-world performance?

DOCSIS 3.1 supports up to 10 Gbps downstream and 1 Gbps upstream, but this modem's 2.5 Gbps port caps the practical speed at 2.5 Gbps.

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