ARRIS - SURFboard S33 32 x 8 DOCSIS 3.1 Multi-Gig Cable Modem with 2.5 Gbps (Renewed)

I picked up this renewed ARRIS SURFboard S33 cable modem to completely remove the bottleneck on my high-speed home network infrastructure. Buying a refurbished networking device can sometimes feel like a gamble, but this unit arrived looking pristine and has worked perfectly without a single drop or hiccup. If you pay for an internet tier over 1,000 Mbps, this DOCSIS 3.1 box is an absolute necessity to unleash your true bandwidth.Why this multi-gig modem is an exceptional tech upgrade:True 2.5 Gbps Ethernet Output: The standout feature of the S33 is its dedicated 2.5 Gbps multi-gig port. I have this hooked directly into my 2.5G unmanaged network switch. Running speed tests on my desktop, it pulls my ISP’s full over-provisioned speed of 1,200+ Mbps effortlessly, which standard 1G Gigabit ports completely throttle.Flawless Renewed Condition: Out of the packaging, the modem looked completely brand new. There were no scratches on the glossy plastic casing, it came with a clean OEM power supply, and it was entirely wiped. Crucially, the MAC address was unlinked from any previous accounts, allowing my ISP to activate it instantly online.Rock-Solid DOCSIS 3.1 Stability: With 32x8 channel bonding and active queue management (AQM), my line latency has plummeted. It handles massive simultaneous data demands—like heavy 3D printing file uploads, local server streams, and intense gaming sessions—with zero packet loss or random reboots.Network Setup & Activation Tips:Activation Trick: When setting up a third-party or renewed modem, don't wait on hold for tech support. Simply connect your coaxial cable, power it on, open a web browser on a hardwired computer, and your ISP's self-activation portal should pop up automatically to register the new MAC ID.Mind the Heat Dissipation: The S33 packs a ton of processing power into a very compact, vertical footprint. Because it is fanless to remain silent, make sure you place it in an open, well-ventilated area rather than shoving it into a cramped, unventilated media cabinet to prevent thermal throttling.The big takeaway:This renewed SURFboard S33 delivers top-tier, future-proof network performance for a fraction of the cost of a brand-new retail unit. It provisions easily, runs cool when properly placed, and unlocks the full multi-gigabit bandwidth your provider gives you. It is a phenomenal value buy for any power user's network stack.

I love these ARRIS SURFboards - I upgraded from the 8200, which was also a dual LAN ports, but maxed out at 1 gig.The S33 features one 2.5gig port, and one 1gig port. I upgraded my internet package to 2gig, so this S33 SURFboard was right up my alley. The dual LAN ports allow me to set up 2 separate networks, where I can have my mission critical and gaming devices on one network, and my IoT devices on another network, both on separate WiFi routers. And both ports are assigned their own IP addresses.Setup couldn’t have been any easier - for those that do the self install, I’m confident that setup only takes a few minutes. I had to call my ISP since I was doing an upgrade. That only took about 5 minutes for the ISP to detect and register the modem on their network.Finally, the S33 is the smallest cable modem I’ve had to date. It is small, but mighty. This is definitely a modem to consider if you are looking to upgrade your current cable modem.

This would be a 10 star refurbished modem, if only. If only they had pressed the reset button on the bottom of it before they slapped a refurbished sticker on it. Don't make the mistake I did and assume it's going to work straight out of the box. The modem was set to recognize the previous owners' equipment. If you don't press the reset button it will never accept yours. Simple fix. They simply didn't do it and the instructions don't tell you about it.

This is a gem of a cable modem! I replaced a 5 year old DOCSIS 3.0 modem (different manufacturer) with this one and the difference in the 3.1 speed is amazing! It was easy to install and connect to my ISP using their self-install instructions. It runs just a little warm to the touch, just as you would expect for a device of this size and power usage. I have the output wired via an ethernet cable on the other side of my house, to a wireless router from a different manufacturer. They work flawlessly together, very compatible. The unit is a little larger than my old modem, but by no means would I call it large. I bought a renewed unit and it was delivered in pristine condition. No issues at all.It does not have the usual row of about 5 LEDs indicating the various stages of connectivity. So if you need those, you might be disappointed. I have not missed them at all. There LED in the front of the base light up in different colors to indicate various things, so consult the manual. There is an LED on the ethernet cable connector that shows activity too.

Great modem. You need to understand how the modem and whatever router you get work together. My local internet provider had a lot of trouble getting it registered and it was working fine but it doesn't put out a signal without the router. If the light turns solid blue, then its connected and you can go ahead and connect your router.

Speed is good.Logging into the web interface is not possible due to it being previously used. A hard reset will not allow it to be changed if it has been set. Fortunately, I don’t need to see the information that badly. Condition was excellent as stated. Functionality was as advertised. I would recommend it, but I have only had it a few days so far. If it last, it was worth the money compared to other modems and their pricing when new.

Great Product! Gamer Approved!5/5I have two of these set up at two different homes, and both have been excellent. If you don’t have fiber available and your ISP supports it, the S33 is still one of the best cable modems you can get. Very easy and straightforward to setup works great with Xfinity.Both of mine have been completely reliable with no issues, and speeds have been exactly as advertised. The 2.5Gbps port is also great if you have a faster internet plan or want some extra headroom.Highly recommend. These are still pretty much the cream of the crop for cable modems.

While the product works as described, the small housing around the electronic components gets extremely hot. I thought it was odd. Had it replaced, however, even the new one runs very hot. I assume this thermal issue will ultimately cause problems, right now it is not. It’s running fine however in my experience devices that run that hot tend to overheat and cause electronic thermal interference. Only time will tell and I’ll be sure to update this order when and if it does.