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Your cart is empty.Your multi-Gigabit home network will be ready with the SURFboard S33. A DOCSIS 3.1 cable modem. With a 2.5 Gbps Ethernet port plus an additional 1 Gbps Ethernet port it's capable of combined download speeds up to 3.5 Gbps. The S33 is the fastest modem in the SURFboard lineup delivering the fastest speeds and the latest technology without the premium rental cost.
jjc
Reviewed in the United States on February 15, 2025
This updated cable model was easy to install, and able to quickly add to my Xfinity account. Saves alot vs. rentals.
NJAlex
Reviewed in the United States on January 3, 2025
No issues, great connection, have not had a need to restart the modem since purchasing except for when Xfinity was working on lines.
Dave
Reviewed in the United States on January 24, 2025
Works great
Jonathan W. Stettler
Reviewed in the United States on July 24, 2024
The unit works as advertised but this modem doesn't work well with Xfinity's Gigabit+ plans.Download speeds are great, but the upload speeds are limited since this is not one of Xfinity's approved modems. You will get a max upload of 40Mbps if you use this modem.Switch to an approved modem and now my upload speeds are good.
Aaron
Reviewed in the United States on June 4, 2024
⭐⭐⭐⭐⭐**Excellent Modem for High-Speed Internet!**The ARRIS Surfboard S33 (Renewed) is a fantastic modem that works great with my local ISP, Rainier Connect. Setting it up was a breeze, and it has delivered outstanding performance since day one. With DOCSIS 3.1 technology and multi-gigabit capability, I am getting lightning-fast speeds, perfect for streaming, gaming, and working from home.The 1 and 2.5 Gbps ports are a significant upgrade, allowing me to maximize my internet plan's potential. The modem supports up to 2.5 Gbps max speeds and utilizes 4 OFDM channels to ensure a stable and reliable connection.I am thoroughly impressed with this renewed model—it performs like new and offers excellent value. If you're looking for a high-performance cable modem, I highly recommend the ARRIS Surfboard S33. It has been a game-changer for my internet experience with Rainier Connect.
Customer
Reviewed in the United States on January 9, 2024
I have nothing to complaint about the modem itself. It is a factory refurbished model and looks like new. Installation on Xfinity was smooth, just had to remove my old Motorola plug the coaxial and Ethernet cable to the S33, plug it to the wall outlet, open the Xfinity app and add the new modem. It worked on the first try. I have the 1.2gb/s plan so I’m supposed to get 1.2gb/s download and 120mb/s upload. As I’m limited to my router’s 1gb/s port I’m not expecting to get 1.2gb/s download but the 120mb/s download would be very welcome. As you guys can see in my second picture I’m getting about 977mb/s download and 948mb/s upload internally using a gigabit LAN connection. The third picture shows a internet test and there is where the problem using the S33 with Xfinity is, can’t get 120mb/s upload because Comcast blocks this modem from using mid-split with their network because they say it has not been certified so if you want that fast upload speed you will have two options, renting their modem or buying a Hitron CODA. I’m giving the product 5 stars because it’s pretty good and the issue with Xfinity is not the product’s fault so if you don’t rely on high upload speeds using Xfinity go for it, it’s certified by Xfinity for up to 2.33gb/s download but if you need high upload speeds look elsewhere.
David W Potts
Reviewed in the United States on September 15, 2023
For a point of reference, I'm a network engineer. This is easy to set up, if it works for your specific application. The problem with it is, there is no way to easily configure things such as the internal DHCP server or certain security features you'd have access to with an older modem. If your firewall on your network will not receive a DHCP address correctly from this device, you have little options for resolving the issue. I wiresharked the connection and my firewall was failing to negotiate an IP lease from the modem. With no way to access any meaningful interface other than the web interface on the modem (which is useless since it only shows information and does not allow any configurations to be edited) or using the completely worthless Arris android app, which is just informational and does nothing to configure the device, you're screwed. I've had the device randomly fail several times. Each time the DHCP server in the device failed to hand out an IP address to my firewall. One time, the cable company pushed out a firmware upgrade which broke it. The firmware upgrades have also removed my passwords and reset them to the default. Bring back user editable configurations and my rating would go up. But this canned one size fits all unconfigurable crap is a pain in the butt.
Biscuit Eater
Reviewed in the United States on October 27, 2023
ARRIS Surfboard S33-RB DOCSIS 3.1 Multi-Gigabit Cable Modem (Renewed).I've had an Xfinity DOCSIS 3.1 rental modem/router combo for several years rent free. That deal came to an end so I purchased a renewed version of the ARRIS Surfboard S33 to avoid the $14.00/month rental fee.The rental modem/router worked great with consistent 940 Mbs download speeds and 40 Mbs upload speeds without a VPN connection and about 700Mbs download speeds with a VPN. I generally use a VPN so I wanted to purchase a DOCSIS 3.1 modem that was at least as fast as the Xfinity rental modem. The ARRIS S33 provides nearly identical upload and download speeds as compared to the Xfinity rental modem.I had an ASUS RT-AC1900 dual band gigabit router in storage to add to the ARRIS Surfboard S33 modem.The ASUS router is an older 802.11ac router but it's performance exceeds the router built into the Xfinity modem/router combo.I was not looking forward to calling Xfinity on the phone to activate my new/refurbished ARRIS Surfboard S33 modem so I opted to use the Xfinity app on my phone to complete the activation.I don't have a great cellphone signal in my rural house and of course no in-home WiFi at this point in the modem activation process so I walked down the road until my reception improved and typed the 12 digit MAC address into the Xfinity app and hit send.Much to my delight,when I got back to the house five minutes later the blue light was lit on the S33 and I had a nice speedy internet connection.So far so good with my refurbished modem. I've generally had good luck with my electronics gear new or used. Hopefully my luck holds with this renewed ARRIS S33 modem.
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