ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem
Q: Does the S34 support DOCSIS 3.1?
A: The ARRIS SURFboard S34 is a DOCSIS 3.1 cable modem.
Q: What is the height of the S34?
A: The height of the S34 is 5.14 inches.
Q: What is the manufacturer's warranty for parts?
A: The manufacturer's warranty for parts is 2 years.
Q: What type of modem is the S34?
A: The S34 is a high speed modem.
A: The S34 is listed on Xfinity's "Full List of Compatible Devices" PDF and it works with Next Gen Speed Tier service for download speed up to 2.32 Gbps and upload speed up to 444 Mbps. https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2025.03.25%20Full%20List%20of%20Compatible%20Devices.pdf
Q: Will the Arris modem s34 work with Optimum.net?
A: Optimum allows you to use the S34 modem on their Internet service with no phone service.
Q: Does this S34 run hot? as so many have reported the S33 to get hot enough to shut down,
A: It gets warm, not hot. It has never shut down.
Q: Does the ARRIS S34 work with Astound provider?
A: Yes, the ARRIS S34 modem is compatible with Astound Broadband internet service (up to 1 Gbps), provided you're using their broadband (coaxial cable) service and not fiber-to-the-home or Ethernet-delivered service, which requires Astound-supplied equipment. We recommend you check with Astound for compatibility with your current Internet service plan.

ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem

The ARRIS SURFboard S33 is a DOCSIS 3.1 Cable Modem that delivers the fastest speeds and the latest technology. With a 2.5 Gigabit and a 1 Gigabit Ethernet port, the S33 enables a multi-gig experience for things like online gaming, 4K video streaming and more. It’s best for cable internet speed plans up to 2.5 Gbps and setup is simple with an easy-to-use app. It's compatible with any Wi-Fi router and saves you money on monthly rental fees. Upgrade your home network with an SURFboard S33 DOCSIS 3.1 Cable Modem.

Multi-gigabit speeds for your home network. The SURFboard G36 is a DOCSIS 3.1 Cable Modem & Wi-Fi 6 Router combo. Stream 4K content smoothly, game without interruptions or slowdowns. It features a 2.5 Gbps Ethernt port for multi-gig networking PLUS four 1-Gigabit Ethernet ports to connect all your devices. The SURFboard G36 is compatible with major U.S. cable internet service providers and is best for speed plans up to 2.5 Gbps. The compatible SURFboard Central app simplifies setup and management of your network.

The ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem is capable of delivering true Gigabit speeds. It's approved for use with Cox, Spectrum, Xfinity and others supporting cable internet speed plans up to 1 Gbps. Upgrading your home network starts with your modem.
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| Cons for ARRIS - SURFboard S34 32 x 8 DOCSIS 3.1 Multi-Gig Cable Modem with 2.5 Gbps Ethernet Port - White | |||
Customers enjoy the SURFboard S34 modem for its overall performance, speed, and easy setup. Many have noted its compact size, ease of use, and simple connectivity. The modem's heat dissipation was mentioned as a potential drawback.
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
This modem supports upto 2.5Ghz speeds. This will future proof my home network for next 10 years. The setup process is pretty straightforward. You need to contact your ISP and provide them with the modem’s MAC Address (found on modem). They’ll add the modem to your account and activate it for you. Once the modem is activated, its time to test. I recommend connecting an Ethernet cable from the modem to computer’s Ethernet. Run a speed test (speedtest.net) and make sure not only that its working but also to ensure you are getting the download speed you are paying for. In my case, I have Astound Broadband and paying for 500Mbs. When I ran a speed test, i was blown away! I’m actually consistently getting a little over 600Mbs download speed. If you ask me, thats pretty impressive! I highly recommend the Arris S34 modem as part of your home network.
Posted by Eman
I have used it as a replacement to my Xfinity modem and it is working as expected. You need to pair it up with a router for WiFi connection. I used my old to link router along with it
Posted by SrinivasD
It looks very nice, and the network connection is very fast. I really like it.
Posted by XiaW