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- Best overall: ARRIS SURFboard S33 DOCSIS 3.1 Multi-Gig Cable Modem
- Best budget: ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem
- Best premium: NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem
- Best for voice: NETGEAR Nighthawk CM2050V DOCSIS 3.1 Cable Modem with Voice
- The ARRIS SURFboard S33 and several NETGEAR Nighthawk models have a 2.5GbE port for multi-gig internet plans.
- The ARRIS SURFboard S33 is a strong choice for shoppers who want a compact standalone modem with both 2.5GbE and 1GbE ports.
- The NETGEAR Nighthawk CM2050V adds two voice ports for compatible Xfinity Voice service.
- The ARRIS SURFboard G34 combines a DOCSIS 3.1 modem with a Wi-Fi 6 router, so it does not need a separate router.
- Check your internet provider’s approved-device list and plan speed before choosing any cable modem.
The ARRIS SURFboard S33 and NETGEAR Nighthawk CM2000 are strong Black Friday 2026 cable-modem picks, and both include a 2.5GbE port for multi-gig connectivity. I researched and compared specs, reviews and owner feedback to help shoppers choose the right modem for their provider, plan and home network.
The short answer: choose the S33 for a straightforward standalone modem with an additional 1GbE port, or look at a Nighthawk model for features such as voice support or extra Ethernet options. The best pick depends on ISP approval, not just a modem’s headline speed. Best bet: confirm compatibility first, then match the ports and features to your setup.
How We Picked
- Compared DOCSIS 3.1 support and listed Ethernet port speeds.
- Reviewed manufacturer specifications, customer reviews and owner feedback.
- Considered whether each product is a standalone modem or a modem-router combination.
- Checked which models add practical features such as voice ports or Wi-Fi 6.
- Prioritized options with clear use cases and reminded shoppers to confirm ISP approval.
Comparison Table
| Product | Best for | DOCSIS | Ethernet ports | Wi-Fi |
|---|---|---|---|---|
| ARRIS SURFboard S33 DOCSIS 3.1 Multi-Gig Cable Modem | Standalone multi-gig modem | 3.1 | 1 x 2.5GbE, 1 x 1GbE | None |
| NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem | Newer multi-gig modem setup | 3.1 | 1 x 2.5GbE, 1 x 1GbE | None |
| NETGEAR Nighthawk CM2500 DOCSIS 3.1 Cable Modem | Two Ethernet speeds | 3.1 | 1 x 2.5GbE, 1 x 1GbE | None |
| NETGEAR Nighthawk CM2000 DOCSIS 3.1 Cable Modem | A single 2.5GbE connection | 3.1 | 1 x 2.5GbE | None |
| NETGEAR Nighthawk CM2050V DOCSIS 3.1 Cable Modem with Voice | Compatible voice service | 3.1 | 1 x 2.5GbE | None |
| ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem | Gigabit Ethernet setups | 3.1 | 2 x 1GbE | None |
| ARRIS SURFboard G34 DOCSIS 3.1 Wi-Fi 6 Cable Modem Router | Modem and Wi-Fi in one device | 3.1 | 4 x 1GbE | Wi-Fi 6 |
Best Picks Reviewed
#1 · Top pick
ARRIS SURFboard S33 DOCSIS 3.1 Multi-Gig Cable Modem
The ARRIS SURFboard S33 DOCSIS 3.1 Multi-Gig Cable Modem is the best overall pick for households seeking a compact standalone modem, with a 2.5GbE port for multi-gig networking.
Best for: Standalone modem shoppers who want two Ethernet port options.
- DOCSIS
- 3.1
- Ethernet ports
- 1 x 2.5GbE, 1 x 1GbE
- Modem type
- Cable modem
- 2.5GbE and 1GbE ports provide useful connection flexibility.
- Compact standalone design pairs with a separate router.
- DOCSIS 3.1 supports compatible high-speed cable plans.
- Does not include Wi-Fi; a separate router is required.
- Plan compatibility depends on the cable provider.
Is the ARRIS SURFboard S33 DOCSIS 3.1 Multi-Gig Cable Modem worth buying on Black Friday 2026?
Yes. The ARRIS SURFboard S33 DOCSIS 3.1 Multi-Gig Cable Modem is a solid buy for shoppers who want a standalone DOCSIS 3.1 modem, a 2.5GbE connection and a separate router of their choice.
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#2
NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem
The NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem is the best premium pick for multi-gig cable subscribers, with a 2.5GbE port and a second 1GbE port.
Best for: Multi-gig plans and shoppers seeking newer Nighthawk hardware.
- DOCSIS
- 3.1
- Ethernet ports
- 1 x 2.5GbE, 1 x 1GbE
- Modem type
- Cable modem
- 2.5GbE port supports a multi-gig wired connection.
- Additional 1GbE port gives another connection option.
- DOCSIS 3.1 design suits high-speed cable service.
- Requires a separate Wi-Fi router.
- Confirm ISP approval and plan support before purchase.
Is the NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem worth buying on Black Friday 2026?
Yes. The NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem is a good fit for a multi-gig cable plan when the provider approves it. The NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem's 2.5GbE and 1GbE ports support flexible wired networking.
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#3
NETGEAR Nighthawk CM2500 DOCSIS 3.1 Cable Modem
The NETGEAR Nighthawk CM2500 DOCSIS 3.1 Cable Modem is the best pick for cable subscribers who want two Ethernet speeds, with 2.5GbE and 1GbE ports.
Best for: Households upgrading to multi-gig service while keeping a second wired option.
- DOCSIS
- 3.1
- Ethernet ports
- 1 x 2.5GbE, 1 x 1GbE
- Modem type
- Cable modem
- 2.5GbE port supports a multi-gig connection.
- Second Ethernet port serves a 1GbE device.
- Standalone modem works with a separate router.
- No built-in Wi-Fi.
- Provider approval varies by service and plan.
Is the NETGEAR Nighthawk CM2500 DOCSIS 3.1 Cable Modem worth buying on Black Friday 2026?
Yes. The NETGEAR Nighthawk CM2500 DOCSIS 3.1 Cable Modem is worth considering for compatible cable service, especially when a 2.5GbE connection and a second 1GbE port suit your home network.
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#4
NETGEAR Nighthawk CM2000 DOCSIS 3.1 Cable Modem
The NETGEAR Nighthawk CM2000 DOCSIS 3.1 Cable Modem is the best choice for shoppers who need a 2.5GbE modem connection in a standalone unit.
Best for: A multi-gig wired connection to a separate router.
- DOCSIS
- 3.1
- Ethernet port
- 1 x 2.5GbE
- Modem type
- Cable modem
- 2.5GbE port suits a multi-gig network connection.
- DOCSIS 3.1 support works with compatible cable service.
- Standalone setup lets shoppers choose their own router.
- One Ethernet port means a router is essential for most homes.
- Check the provider’s approved-device list.
Is the NETGEAR Nighthawk CM2000 DOCSIS 3.1 Cable Modem worth buying on Black Friday 2026?
Yes. The NETGEAR Nighthawk CM2000 DOCSIS 3.1 Cable Modem is a straightforward choice for compatible plans when the goal is a 2.5GbE modem connection and a separate Wi-Fi router.
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#5
NETGEAR Nighthawk CM2050V DOCSIS 3.1 Cable Modem with Voice
The NETGEAR Nighthawk CM2050V DOCSIS 3.1 Cable Modem with Voice is the best pick for compatible cable customers who need phone service, with 2 voice ports.
Best for: Compatible Xfinity Voice customers who want a modem with phone connections.
- DOCSIS
- 3.1
- Voice ports
- 2
- Ethernet port
- 1 x 2.5GbE
- Two phone ports support compatible voice service.
- 2.5GbE port supports multi-gig wired networking.
- DOCSIS 3.1 cable modem technology.
- Voice service compatibility is provider-specific.
- A separate router is needed for Wi-Fi.
Is the NETGEAR Nighthawk CM2050V DOCSIS 3.1 Cable Modem with Voice worth buying on Black Friday 2026?
Yes. The NETGEAR Nighthawk CM2050V DOCSIS 3.1 Cable Modem with Voice is a strong choice for compatible Xfinity Voice customers who want two phone ports and a 2.5GbE connection in one cable modem.
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#6
ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem
The ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem is the best budget-focused pick for shoppers who want a basic standalone modem, with 2 Gigabit Ethernet ports.
Best for: Shoppers who need a DOCSIS 3.1 modem and do not need a 2.5GbE port.
- DOCSIS
- 3.1
- Ethernet ports
- 2 x 1GbE
- Modem type
- Cable modem
- Two Gigabit Ethernet ports provide wired connection options.
- DOCSIS 3.1 support suits compatible cable plans.
- Works with a separately selected Wi-Fi router.
- No 2.5GbE port for multi-gig wired networking.
- No built-in Wi-Fi.
Is the ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem worth buying on Black Friday 2026?
Yes. The ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem is a practical pick for compatible plans when Gigabit Ethernet meets your needs. Choose a model with 2.5GbE if your network requires multi-gig wired connectivity.
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#7
ARRIS SURFboard G34 DOCSIS 3.1 Wi-Fi 6 Cable Modem Router
The ARRIS SURFboard G34 DOCSIS 3.1 Wi-Fi 6 Cable Modem Router is the best all-in-one pick for households seeking modem and Wi-Fi in one device, with 4 Gigabit Ethernet ports.
Best for: Households that want a cable modem and Wi-Fi 6 router in one unit.
- DOCSIS
- 3.1
- Wi-Fi
- Wi-Fi 6
- Ethernet ports
- 4 x 1GbE
- Combines a cable modem and Wi-Fi router.
- Wi-Fi 6 supports compatible wireless devices.
- Four Gigabit Ethernet ports connect wired devices.
- Does not have a 2.5GbE port.
- An all-in-one unit is less flexible than separate devices.
Is the ARRIS SURFboard G34 DOCSIS 3.1 Wi-Fi 6 Cable Modem Router worth buying on Black Friday 2026?
Yes. The ARRIS SURFboard G34 DOCSIS 3.1 Wi-Fi 6 Cable Modem Router is a sensible choice for shoppers who want one device for cable internet and Wi-Fi, plus 4 Gigabit Ethernet ports for wired equipment.
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Which is better, the NETGEAR Nighthawk CM2000 or ARRIS SURFboard S33?
The NETGEAR Nighthawk CM2000 DOCSIS 3.1 Cable Modem and ARRIS SURFboard S33 DOCSIS 3.1 Multi-Gig Cable Modem both have a 2.5GbE port, so either suits a compatible multi-gig setup. The key difference is the second Ethernet connection: the S33 adds a 1GbE port, while the CM2000 has one listed 2.5GbE port.
Choose the ARRIS SURFboard S33 when the extra 1GbE connection is useful or when its compact design fits your setup. Choose the NETGEAR Nighthawk CM2000 when a single multi-gig modem connection to your router covers your needs. Neither modem includes Wi-Fi, so plan for a separate router.
Provider approval matters more than brand preference. Check your internet service provider’s device list and plan details before buying, then confirm the modem’s Ethernet port matches the WAN port on your router.
Are NETGEAR Nighthawk and ARRIS SURFboard modems compatible with every cable provider?
The ARRIS SURFboard S33 and NETGEAR Nighthawk CM2000 are DOCSIS 3.1 modems, but ISP approval is still required for both models. A modem’s technical capabilities do not guarantee support on every cable network or plan.
Look up the exact model name on the provider’s approved-device list before ordering. Confirm that the list covers your service tier, not just basic internet access. Customers who bundle internet with voice service need to check voice compatibility separately; a modem with phone ports does not work with every provider.
Also verify activation steps and whether the provider requires a particular modem feature. Keeping your router model and plan information nearby makes the compatibility check quicker and helps avoid choosing hardware that does not match your service.
Should I choose a standalone cable modem or a modem-router combo?
The ARRIS SURFboard G34 combines a DOCSIS 3.1 modem with Wi-Fi 6, while the ARRIS SURFboard S33 is a standalone modem with 2 Ethernet ports. The G34 suits shoppers who want one device for internet access and wireless networking; the S33 suits shoppers who already own or want to choose a separate router.
An all-in-one model keeps the equipment list simple and gives a household fewer devices to position and manage. Separate equipment gives shoppers more freedom to replace or upgrade the modem and router independently. The right choice depends on home layout, wireless coverage needs and whether the ISP approves the combo for the selected plan.
Before deciding, compare the router features you need with the G34’s Wi-Fi 6 and 4 Gigabit Ethernet ports. For a separate setup, check that the router has a suitable WAN port for the modem.
Do I need a 2.5GbE port on a cable modem?
The ARRIS SURFboard S33 and NETGEAR Nighthawk CM2500 each include a 2.5GbE port, which is useful when the internet plan and connected router support multi-gig wired speeds. A faster port does not raise the speed of a lower-speed plan.
A 1GbE connection remains a good match for many homes with Gigabit-class service or a router that has only a Gigabit WAN port. The ARRIS SURFboard SB8200 has 2 Gigabit Ethernet ports, while the S33 and CM2500 provide a 2.5GbE connection plus a 1GbE option.
Match the modem port to both your cable plan and router. Check the provider’s plan information and the router’s WAN specifications, since the slowest connection in the chain sets the practical limit.
Which cable modem is best for voice service?
The NETGEAR Nighthawk CM2050V DOCSIS 3.1 Cable Modem with Voice has 2 voice ports and is designed for compatible Xfinity Voice service. The extra phone connections make it the clearest option in this guide for shoppers who want cable internet and home phone service through a supported modem.
Voice support is not universal, so confirm the exact modem and phone-service compatibility with your provider before buying. A regular cable modem such as the ARRIS SURFboard S33 is not a substitute for a voice-capable model when a provider requires phone ports.
Shoppers who do not use provider-based home phone service can focus on Ethernet ports, router needs and plan compatibility instead. For voice customers, check provider approval for both internet and phone features.
Buying Guide
Check ISP compatibility first
The ARRIS SURFboard S33 and NETGEAR Nighthawk CM2000 both need provider approval before activation. Search the ISP’s current approved-device list using the complete model name, then verify approval for your specific plan. Voice customers should confirm phone-service support separately.
Match the modem to your internet plan
The NETGEAR Nighthawk CM2500 has a 2.5GbE port for compatible multi-gig service, while the ARRIS SURFboard SB8200 has 2 Gigabit Ethernet ports. Compare your plan’s speed with the modem and router ports instead of choosing on the DOCSIS label alone.
Decide whether you need Wi-Fi built in
The ARRIS SURFboard G34 pairs a DOCSIS 3.1 modem with Wi-Fi 6 and 4 Gigabit Ethernet ports. Standalone choices such as the ARRIS SURFboard S33 need a separate router. Choose the combo for a simpler device setup or separate hardware for more upgrade flexibility.
Count the ports your household uses
The ARRIS SURFboard S33 has 2 Ethernet ports, and the NETGEAR Nighthawk CM2000 has 1 listed 2.5GbE port. Count wired devices and confirm whether your router connects directly to the modem. Most home networks use a router for multiple wired and wireless devices.
Check voice requirements before choosing
The NETGEAR Nighthawk CM2050V has 2 voice ports for compatible service. If home phone service is part of your cable plan, confirm that your provider supports the model’s voice features. Shoppers without voice service can compare the other modems by ports and router needs.
FAQ
What is the main difference between the NETGEAR Nighthawk CM2000 and ARRIS SURFboard S33?
The NETGEAR Nighthawk CM2000 has 1 listed 2.5GbE port, while the ARRIS SURFboard S33 has a 2.5GbE port and a 1GbE port. Both are DOCSIS 3.1 standalone modems, and both require ISP approval and a separate router for Wi-Fi.
Is the ARRIS SURFboard S33 worth buying on Black Friday 2026?
Yes. The ARRIS SURFboard S33 is a strong choice for compatible cable service when you want DOCSIS 3.1, a 2.5GbE port and a second 1GbE connection. Confirm ISP approval and remember to pair it with a separate Wi-Fi router.
Does the NETGEAR Nighthawk CM2050V work with every cable provider?
No. The NETGEAR Nighthawk CM2050V DOCSIS 3.1 Cable Modem with Voice requires provider approval, and its voice features are provider-specific. Check the exact model on your ISP’s current list and confirm support for both internet and phone service.
Does the ARRIS SURFboard G34 include Wi-Fi?
Yes. The ARRIS SURFboard G34 DOCSIS 3.1 Wi-Fi 6 Cable Modem Router combines a cable modem with a Wi-Fi 6 router and 4 Gigabit Ethernet ports. Confirm that your ISP approves the model for your plan before purchasing.
Is the ARRIS SURFboard SB8200 a multi-gig cable modem?
The ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem has 2 Gigabit Ethernet ports, not a 2.5GbE port. The model suits compatible Gigabit Ethernet setups; shoppers needing a 2.5GbE modem connection should compare the ARRIS SURFboard S33 or a compatible NETGEAR Nighthawk option.
Do the ARRIS SURFboard S33 and NETGEAR Nighthawk CM2500 include a Wi-Fi router?
No. The ARRIS SURFboard S33 DOCSIS 3.1 Multi-Gig Cable Modem and NETGEAR Nighthawk CM2500 DOCSIS 3.1 Cable Modem are standalone modems. Add a separate router for Wi-Fi, and make sure its WAN port matches the connection you plan to use.