--- product_id: 421343764 title: "(S33) - Cable Modem - Fast DOCSIS 3.1 Multi-Gigabit Modem For Comcast Xfinity, Cox, Spectrum & More 1 & 2.5 Gbps Ports 2.5 Gbps Max Internet Speeds 4 OFDM Channels 2 Year Warranty" brand: "arris" price: "2863 kr" currency: DKK in_stock: true reviews_count: 5 url: https://www.desertcart.dk/products/421343764-s33-cable-modem-fast-docsis-3-1-multi-gigabit-modem store_origin: DK region: Denmark --- # 2.5 Gbps max speed Save $168/year rental fees DOCSIS 3.1 tech (S33) - Cable Modem - Fast DOCSIS 3.1 Multi-Gigabit Modem For Comcast Xfinity, Cox, Spectrum & More 1 & 2.5 Gbps Ports 2.5 Gbps Max Internet Speeds 4 OFDM Channels 2 Year Warranty **Brand:** arris **Price:** 2863 kr **Availability:** ✅ In Stock ## Summary > 🚀 Unlock Multi-Gig Power & Slash Bills with ARRIS S33! ## Quick Answers - **What is this?** (S33) - Cable Modem - Fast DOCSIS 3.1 Multi-Gigabit Modem For Comcast Xfinity, Cox, Spectrum & More 1 & 2.5 Gbps Ports 2.5 Gbps Max Internet Speeds 4 OFDM Channels 2 Year Warranty by arris - **How much does it cost?** 2863 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/421343764-s33-cable-modem-fast-docsis-3-1-multi-gigabit-modem) ## Best For - arris enthusiasts ## Why This Product - Trusted arris brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual Ethernet Ports:** Connect multiple devices with 2.5 Gbps + 1 Gbps ports for ultimate network flexibility. - • **Next-Gen DOCSIS 3.1:** Cutting-edge cable modem tech delivering 10x faster speeds and reduced lag. - • **Cut Your Cable Costs:** Own your modem and save up to $168 annually on rental fees—smart money move. - • **Plug & Play Simplicity:** Effortless setup with SURFboard Central App—get online in minutes, no tech headaches. - • **Blazing Multi-Gig Speeds:** Experience ultra-fast 2.5 Gbps Ethernet for seamless streaming, gaming, and remote work. ## Overview The ARRIS SURFboard S33 is a DOCSIS 3.1 cable modem designed for professional-grade home networks, supporting up to 2.5 Gbps speeds via its multi-gig Ethernet port. Compatible with major U.S. ISPs like Comcast Xfinity, Cox, and Spectrum, it features dual Ethernet ports, easy app-based setup, and helps users save on costly rental fees with a 2-year warranty. ## Description 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. Review: A very fast, and so far reliable modem - I should start out by stating that I am an IT professional, and have been in the industry for 24 years. I have a family of 6, all of whom are doing school remotely in this COVID world, and I've worked from home for the better part of the last 8 years, so home Internet is my livelihood. I also have one gamer in the family who tests bandwidth and connectivity to its limits for me. We moved (in town) November of 2020, so I have been on a Netgear C7100V for the past 5 months. Which, granted was its own Wifi router (2-in-1) and had a smaller price point, AND was an older model than the Arris S33. For the last 45 or so days, while on the old Netgear, my Xfinity connection had been dropping periodically. Turns out the Netgear C7100V was recently removed from the compatibility list. I figured I better buy a new modem that was on the list before I call Comcast and complain because the first thing they're going to say to me is go buy another modem before they'll support my problem. Buddy of mine in IT had the Arris S33 Surfboard, and raved about it, so I thought I'd give it a try. And because my old Netgear was a modem/router combo, I had to purchase routers too, so for context, I should disclose that I also upgraded to an Eero 6 pro 3-pack tri-band mesh wifi6 router system too. BUT, I can say unequivocally, that I never got anywhere close to the 1Gbps speeds I was paying for with the Netgear C7100V. 600mbps, tops, which is a bandwidth limitation of that device that I lived with and dealt with because no one ever got 600mbps TO the modem over wifi anyway, so the bottleneck was before the Internet egress before anyway, and still is, and probably always will be with wifi, but I digress. But with this Arris S33 Surfboard modem, I get a consistent, all day, everyday, 900+mbps of my 1gbps service. And, so far, no drops in service either since installing the Arris (fingers crossed it's only been 3 days). But even if I do, this review is still relevant because if I continue to experience drops even after the new modem and router, pretty sure it's the service provider at that point anyway. It's smaller, easy to use, quick simple setup, and if you have the Xfinity app on your phone there's no need to even call Comcast. You don't need to be an IT pro either. It took, like 20 minutes to setup, using the included quick setup guide, and it's been "set it and forget it" ever since (again, so far). I'll come back and revise this review if that changes, but I have no complaints. Review: Round Two for the ARRIS S33: Lightning Struck My First One, But I’m Still Hooked - This is my second time buying the ARRIS S33 DOCSIS 3.1 multi-gigabit cable modem—because lightning apparently decided my internet setup was too good and struck down my first one like Zeus himself was having a bad day. RIP, my beloved modem, you lasted just long enough to show me what true speed feels like before being vaporized in a flash. But honestly? I’m not mad. The ARRIS S33 is a beast. It supports DOCSIS 3.1, meaning it’s ready for the next-generation high-speed cable internet—like, up to 2 Gbps downstream and 1 Gbps upstream (if your ISP and plan are playing along). It’s also backwards compatible with DOCSIS 3.0, so if your ISP hasn’t fully upgraded yet, no worries. Installation is impressively painless. Plug and play, with support for IPv4 and IPv6, and it handles channel bonding like a champ—aggregating multiple channels to maximize throughput and minimize lag. I’ve thrown all kinds of traffic at it: 4K Netflix, intense online gaming sessions, video calls where my face looks mostly presentable, and it doesn’t even break a sweat. The only caveat: lightning doesn’t play nice with electronics. So if you live somewhere prone to storms like me, consider a surge protector or UPS, unless you want to keep buying backup modems like this is a weird hobby. Bottom line: the ARRIS S33 is fast, reliable, and future-proof enough to handle whatever Comcast Xfinity throws at it. Just pray to the weather gods to keep your modem alive. ## Features - Save Money: Own your modem and save. Reduce your cable bill up to $168 dollars per year in cable modem rental fees (Savings vary by cable service provider). Certified for use with most U.S. cable internet service providers. For a complete list see additional details below. - Modem Technology: DOCSIS 3.1 is the newest technology available from cable internet providers. Its 10x faster than DOCSIS 3.0, provides better security, reduces lag while gaming & enables multi-gig networking (ability to run fast speeds on your copper cable from your internet provider). - Simple and Secure Set-up: Plug-in the device, download the SURFboard Central App, and follow the instructions to activate the modem. Connect to a Wi-Fi router for networking. - Compatibility: The SURFboard S33 is compatible with major U.S. cable internet providers including Cox (Gigablast), Spectrum (Internet Gig), Xfinity (Blast!/Extreme Pro) and others. It's approved for cable internet speed plans up to 2.5-Gbps. Check your Internet Service Provider (ISP) website to confirm compatibility. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08FMSC5WZ | | Best Sellers Rank | 213,870 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 90 in Modems | | Box Contents | SURFboard S33 DOCSIS 3.1 Cable Modem - AMZ | | Brand | ARRIS | | Brand Name | ARRIS | | Colour | Black | | Compatible Devices | Ethernet Connected Devices, Personal Computer, Computer Router | | Compatible devices | Ethernet Connected Devices, Personal Computer, Computer Router | | Connectivity technology | Ethernet | | Customer Reviews | 4.2 out of 5 stars 3,765 Reviews | | Data Transfer Rate | 2.5 Gigabits Per Second | | Internet Service Provider | Comcast Xfinity, Cox, Spectrum | | Internet service provider | Comcast Xfinity, Cox, Spectrum | | Item Dimensions L x W x H | 13.1L x 4.6W x 12H centimetres | | Item Type Name | Docsis 3.1 Modem | | Item Weight | 0.9 Pounds | | Manufacturer | CommScope | | Manufacturer Part Number | S33 | | Maximum Downstream Data Transfer Rate | 2.5 Gigabits Per Second | | Maximum Upstream Data Transfer Rate | 1000 Megabits Per Second | | Model Number | S33 | | Modem Type | Cable | | Network Connectivity Technology | Ethernet | | Number of Ethernet Ports | 2 | | Number of Ports | 2 | | Product dimensions | 13.1L x 4.6W x 12H centimetres | | UPC | 612572216804 | | Unit Count | 1.0 count | ## Product Details - **Brand:** ARRIS - **Compatible devices:** Ethernet Connected Devices, Personal Computer, Computer Router - **Connectivity technology:** Ethernet - **Internet service provider:** Comcast Xfinity, Cox, Spectrum - **Product dimensions:** 13.1L x 4.6W x 12H centimetres ## Images ![(S33) - Cable Modem - Fast DOCSIS 3.1 Multi-Gigabit Modem For Comcast Xfinity, Cox, Spectrum & More 1 & 2.5 Gbps Ports 2.5 Gbps Max Internet Speeds 4 OFDM Channels 2 Year Warranty - Image 1](https://m.media-amazon.com/images/I/51C-1U3oAdL.jpg) ![(S33) - Cable Modem - Fast DOCSIS 3.1 Multi-Gigabit Modem For Comcast Xfinity, Cox, Spectrum & More 1 & 2.5 Gbps Ports 2.5 Gbps Max Internet Speeds 4 OFDM Channels 2 Year Warranty - Image 2](https://m.media-amazon.com/images/I/61DWgyO2mkL.jpg) ![(S33) - Cable Modem - Fast DOCSIS 3.1 Multi-Gigabit Modem For Comcast Xfinity, Cox, Spectrum & More 1 & 2.5 Gbps Ports 2.5 Gbps Max Internet Speeds 4 OFDM Channels 2 Year Warranty - Image 3](https://m.media-amazon.com/images/I/613VALgg3fL.jpg) ![(S33) - Cable Modem - Fast DOCSIS 3.1 Multi-Gigabit Modem For Comcast Xfinity, Cox, Spectrum & More 1 & 2.5 Gbps Ports 2.5 Gbps Max Internet Speeds 4 OFDM Channels 2 Year Warranty - Image 4](https://m.media-amazon.com/images/I/610jPHr-BsL.jpg) ![(S33) - Cable Modem - Fast DOCSIS 3.1 Multi-Gigabit Modem For Comcast Xfinity, Cox, Spectrum & More 1 & 2.5 Gbps Ports 2.5 Gbps Max Internet Speeds 4 OFDM Channels 2 Year Warranty - Image 5](https://m.media-amazon.com/images/I/61eeQZbD72L.jpg) ## Questions & Answers **Q: Can you use both ethernet ports at the exact same time?** A: Depends on your ISP. The company I work for gives you 2 public IP addresses and you can get any combo of 2 computers, 1 computer and one router or 2 routers. You WILL NOT however get full speed on both at the same time but not half either. The modems we use now have only one ethernet port but if you hook up a simple switch you get both IPs through it. But ONLY 2. **Q: Will this support xfinity extreme 1200mbps ? it's not on the supported device list.** A: The Arris S33 is a DOCIS 3.1 capable device 32 x 8 rated for speeds up to 2.5 Gb. While the modem is indeed on Xfinity supported device list (check detailed discussions on dslreports.com), what matters is your router. Ensure you have a router capable of 1+Gb speeds. **Q: Does this modem support snmp?** A: NO. I wish that wasn't the case, but we have no SNMP access. No Arris home modems support user facing SNMP. The cable provider has management, but SNMP isn't exposed to the home network. From Arris: "SNMP (Simple Network Management Protocol) is not supported in Motorola Home Networking products. SNMP is included in Motorola Cable Modem and Home Gateway products, but it is intended for use only by the Cable Provider. There is no direct access to SNMP MIBs for the end-user." **Q: Is one port for the router and the other port can be used for hardwiring a device (computer, etc) directly to modem?** A: The second port can only be used if connected to a separate/different IP. In other words, your ISP will have to give you 2 separate IPs. in order to use the second port. ## Customer Reviews ### ⭐⭐⭐⭐⭐ A very fast, and so far reliable modem *by S***R on 22 March 2021* I should start out by stating that I am an IT professional, and have been in the industry for 24 years. I have a family of 6, all of whom are doing school remotely in this COVID world, and I've worked from home for the better part of the last 8 years, so home Internet is my livelihood. I also have one gamer in the family who tests bandwidth and connectivity to its limits for me. We moved (in town) November of 2020, so I have been on a Netgear C7100V for the past 5 months. Which, granted was its own Wifi router (2-in-1) and had a smaller price point, AND was an older model than the Arris S33. For the last 45 or so days, while on the old Netgear, my Xfinity connection had been dropping periodically. Turns out the Netgear C7100V was recently removed from the compatibility list. I figured I better buy a new modem that was on the list before I call Comcast and complain because the first thing they're going to say to me is go buy another modem before they'll support my problem. Buddy of mine in IT had the Arris S33 Surfboard, and raved about it, so I thought I'd give it a try. And because my old Netgear was a modem/router combo, I had to purchase routers too, so for context, I should disclose that I also upgraded to an Eero 6 pro 3-pack tri-band mesh wifi6 router system too. BUT, I can say unequivocally, that I never got anywhere close to the 1Gbps speeds I was paying for with the Netgear C7100V. 600mbps, tops, which is a bandwidth limitation of that device that I lived with and dealt with because no one ever got 600mbps TO the modem over wifi anyway, so the bottleneck was before the Internet egress before anyway, and still is, and probably always will be with wifi, but I digress. But with this Arris S33 Surfboard modem, I get a consistent, all day, everyday, 900+mbps of my 1gbps service. And, so far, no drops in service either since installing the Arris (fingers crossed it's only been 3 days). But even if I do, this review is still relevant because if I continue to experience drops even after the new modem and router, pretty sure it's the service provider at that point anyway. It's smaller, easy to use, quick simple setup, and if you have the Xfinity app on your phone there's no need to even call Comcast. You don't need to be an IT pro either. It took, like 20 minutes to setup, using the included quick setup guide, and it's been "set it and forget it" ever since (again, so far). I'll come back and revise this review if that changes, but I have no complaints. ### ⭐⭐⭐⭐⭐ Round Two for the ARRIS S33: Lightning Struck My First One, But I’m Still Hooked *by D***T on 22 September 2025* This is my second time buying the ARRIS S33 DOCSIS 3.1 multi-gigabit cable modem—because lightning apparently decided my internet setup was too good and struck down my first one like Zeus himself was having a bad day. RIP, my beloved modem, you lasted just long enough to show me what true speed feels like before being vaporized in a flash. But honestly? I’m not mad. The ARRIS S33 is a beast. It supports DOCSIS 3.1, meaning it’s ready for the next-generation high-speed cable internet—like, up to 2 Gbps downstream and 1 Gbps upstream (if your ISP and plan are playing along). It’s also backwards compatible with DOCSIS 3.0, so if your ISP hasn’t fully upgraded yet, no worries. Installation is impressively painless. Plug and play, with support for IPv4 and IPv6, and it handles channel bonding like a champ—aggregating multiple channels to maximize throughput and minimize lag. I’ve thrown all kinds of traffic at it: 4K Netflix, intense online gaming sessions, video calls where my face looks mostly presentable, and it doesn’t even break a sweat. The only caveat: lightning doesn’t play nice with electronics. So if you live somewhere prone to storms like me, consider a surge protector or UPS, unless you want to keep buying backup modems like this is a weird hobby. Bottom line: the ARRIS S33 is fast, reliable, and future-proof enough to handle whatever Comcast Xfinity throws at it. Just pray to the weather gods to keep your modem alive. ### ⭐⭐⭐⭐⭐ S33 Modem is great. Xfinity install... BIG pain *by R***C on 6 October 2023* The ARRIS S33 modem was a great upgrade. My prior modem was another ARRIS product and it worked really well. I've had several ARRIS products and all have functioned without issue. The only reason I upgraded was because my old modem was running DOCSIS 3.0 and I wanted to move to DOCSIS 3.1 to get the most out of the 1.2Gps service that I'm paying for. This new S33 modem improved my speeds across all devices by well over 100Mbps. On my M1 iMac I'm now getting 950 Mbps on average. The ARRIS S33 modem is a five star product. I'll summarize the rest of the story so you don't have to read it if you don't want to. You CAN use this modem with your Xfinity service. But you're going to have to work to get it done. The saga below is provided so if you decide to activate this with Xfinity, you'll have an idea of what you'll go through. Now for the ugly: installing this modem with Xfinity service... This is a simple modem. It's designed to be pretty much plug-n-play. Connect coax, plug in power, plug in ethernet cable then activate through Xfinity's app. All the connections on the modem are simple. I went to Xfinity's app to activate and the activation function wouldn't work. It said I had to contact an Xfinity agent directly. So I started the chat with an Xfinity agent. I spent over an hour chatting with the agent as they tried to figure it out. First they said the modem isn't compatible with Xfinity's service. I pointed out it's the recommended modem on Xfinity's website. Then they said they couldn't find the modem in their system so couldn't register it on my account. More haggling. They escalated the issue. Escalation agent had the same problems. After more than an hour they told me I'd have to take the modem to a service center because "the service centers have special tools to scan the modem into the system directly." He assured me no appointment was necessary with my case number. Off to the Xfinity service center I go. I get there and it's a 45 minute wait. The guy says their case number doesn't mean anything to them and I'd still have to wait in line. The guy calls my name and I walk up to the counter. As soon as I lay the modem box on the counter the guy says, "Oh, no. Another one of these." He proceeds to tell me he'll do everything he can to help but they've not been able to do anything with these modems in the service center. He says the service centers don't have any special tools and have to do the same things the online agents do. And he comments that he wishes the online agents wouldn't tell customers what the service centers can do, they're always wrong and just dump problems on the service center. Sure enough, the modem isn't listed in his system either. Nice guy and admits this situation has been causing a terrible customer experience with several customers. He escalates the case to some tech group offsite. He gives me a new case number and says they will have to try to manually configure the modem for my account and I should get a call within an hour. I walked out ticked off and skeptical that I'd get a call or that they'd fix it. 50 minutes later I get a call. A nice guy from the Xfinity tech group tells me he's got it configured and it should install fine. Just have to activate it through the app. I reinstall the modem and go to the Xfinity app to activate. Same error in the app as before and it makes me contact an agent. So I start the chat and explain the situation. The chat agent says to give him a few minutes to review and attempt the activation. He comes back on about 5 minutes later and says it's activated. Sure enough. The modem light is blue and I once again have data flowing. It took somewhere about 4 hours, two chat sessions, a trip to the local service center and referral to some higher Xfinity tech group; but it finally got installed. ## Frequently Bought Together - ARRIS (S33) - Cable Modem - Fast DOCSIS 3.1 Multi-Gigabit Cable Modem For Comcast Xfinity, Cox, Spectrum & More 1 & 2.5 Gbps Ports 2.5 Gbps Max Internet Speeds 2 Year Warranty - (No Built-in Wifi) - Introducing Amazon eero 7 dual-band mesh Wi-Fi 7 router (newest model) - Supports internet plans up to 2.5 Gbps, Coverage up to 6,000 sq. ft., 3-pack --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.dk/products/421343764-s33-cable-modem-fast-docsis-3-1-multi-gigabit-modem](https://www.desertcart.dk/products/421343764-s33-cable-modem-fast-docsis-3-1-multi-gigabit-modem) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-06-20*