Customer Ratings & 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.

The SURFboard S34 delivers fast, stable DOCSIS 3.1 performance with its 2.5 Gbps port, making it perfect for high-speed plans. Easy setup and solid build, though lacking a built-in router. Great value for future-proofing your connection.

Works great. No issues. I have used Arris modems for years including back when they were Motorola, and they've been reliable.

We had the s33 modem, but discovered that for faster Xfinity Upload speeds, we needed to upgrade to this. Once we did, our new 2 Gig plan works like a charm!! We have this modem plugged into the Eero Max 7 Wifi system and we are super happy. Modem setup was a flash, Xfinity only needed the modem MAC address and we were in business!

I purchased this to replace a decade old docsis 3.0 surfboard modem that was still hanging on but it was time to upgrade. Activation took some time and trouble due to xfinity but once that was sorted out it is solid. I bought this specific model because it will support xfinity upload speeds that are rolling out. The modem includes an energy efficiency setting and can be set to have the led lights off. Good options.

Bought this for the Enhanced Upload speeds offered by Xfinity. It doesn’t disappoint as I can see download/upload of 1600/330Mbps and even has the ability to turn off the LED to help darken the room. Also solves the rental fee problem, if you dont mind tending to your own network equipment.

I have Xfinity and our 3 year old modem was restarting to die so i purchased this for replacement. It works well. I used the Xfinity app to get connected and took about 5 minutes although you can use the surfboard connect app to do the same or press skip at the bottom. To be honest I don't think you need the surfboard connect app and it isn't very useful for this S34 modem as i plug into my Asus wifi router for everything else. After Xfinity said I was connected it rebooted the modem which took 10 minutes then I was able to use my wifi so don't panic. From opening the box to wifi was 30 minutes. I get 600mb on two devices at the same time and our area has max upload of 40mb which I am getting. It works great!

So far its working fine, I have a gig plan from Xfinity but I'm only getting 800-850 when hard wired to my Nighthawk 5400 router Does run very hot over 120 deg.

Definitely a great modem, but the web interface needs to be more secure as both the router and browser complain that it isn't secure. The Energy Efficient Ethernet is a great feature, but it would help to be able to turn it on and off easier. The worst thing about is the app they recommend you use to setup and register it. It's much easier to skip the app and use the web interface to register and set it up.

The S34 is the newer version of the already excellent S33 which is on top of most best modems lists. This was only $20.00 more than the S33 so that is the reason I bought this one. Could not be happier. Set up was incredibly simple. The enclosed quick set up guide tells you to download the Surfboard Central app to complete the set up. You do not need to do this. The app just directs you to the Xfinity website to add the modem. I used the Xfinity app and within 10 minutes I was on the internet. I was actually amazed because I had to change modems in the past and it was a nightmare to do. The immediate difference I noticed was my upload speed with my old router increased from 40 Mbps to 350 Mbps and my download went to 850 Mbps consistently. I have now upgraded my network to the TP-Link B65 - BE1100 WIFI 7 mesh router and while my upload speeds stayed the same my downloads are now over 1G. I also read may reviews that this modem runs hot. I found that this was not the case. It does get warm but if you leave it a well ventilated space you should not see any issues. If your looking to future proof you home network you should really get this one. Your probably not going to need a new one for may years.

Definitely an improvement in upload and download speeds with our Xfinity cable service. Just make sure you follow the instructions carefully to register the device with your network using the app. And be patient! It took a couple of tries before i was up and running, but it wasn't long, and I didnt have to contact Xfinity for any help.

Great modem. Running at well above 500 Mbs/sec. I trust this more than the "free" s cable modem/router supplied by Sparklight. I got this based on a replacement via the BestBuy protection Plan. House struck by lightning . Limited number of indication lights as to older version but it works well. Go for it.

Great step up from the S33. Same download speed as prior model, but 10 fold increase in upload speeds! Consistently getting 150-200 Mbps upload speeds now, and sometimes up to 300 Mbps.

Finally, the speed I've been yearning for 2 gig downloads/uploaded for the money i have been spending for years ... 2300dn/ 375 up, thank you, Arris

The ARRIS - SURFboard S34 modem completely resolved the intermittent internet/Wi-Fi problems I had been having for almost a year. I had replaced my old modem about 1 year ago and apparently the new modem I bought had issues as my internet and Wi-Fi would go through spurts of dropping service, sometimes 8-10 times per day. Then it would work fine for 2 weeks, before it started dropping again. The ARRIS modem completely eliminated these issues and also provides lightning fast LAN and Wi-Fi internet service. Very, very happy with this purchase!

I bought the S34 modem believing my router (capable of 350Mbps) would still allow me to reach into the 150 Mbps range. My outdated old modem only gave me 28 Mbps and the S34 bumped it up to 38 Mbps. I'm either missing something or Xfinity has me throttled. I'll update this review if I figure out a speed increase.

Imagine getting this super fast cable modem for free. Well, it's not free to purchase, however, with Xfinity fees eliminated this great cable modem pays for itself in just over a year. Given its advanced nature, it will be both paid for and then a monthly saver by the following year. Installation was a breeze. The small footprint is a bonus. Feel the need for speed?

Great modem, small package so it does not use a lot of space and it has great speeds. Only negative is that they don’t provide an Ethernet cable which is unfortunate but overall a good product.

Best Buy’s service was great! I really appreciate their router trade-in program, which gave me 15% off. This router works well so far — good speed and performance — but it does get noticeably hot during use.

Upgraded to this modem after upgrading my service plan and this was listed as compatible with provider and new plan. Not yet achieving the expected down data rate but the up data rate exceeds the expected speed. The lower than expected down data rate is unlikely due to the modem.