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- Best overall: ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem
- Best budget: ARRIS SURFboard S33 DOCSIS 3.1 Cable Modem
- Best premium: NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem
- Best for one multi-gig connection: NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem
- ARRIS SURFboard S34 is the best overall choice here for a DOCSIS 3.1 upgrade with a 2.5GbE port and an additional 1GbE port.
- NETGEAR Nighthawk CM2050 is a strong alternative for cable customers whose provider lists the modem as compatible and who need one 2.5GbE connection.
- NETGEAR Nighthawk CM3000 is the premium pick for shoppers who want newer DOCSIS 3.1 features, including high-split support.
- A cable modem does not replace a Wi-Fi router; confirm ISP approval, plan speed, and Ethernet needs before buying.
- Black Friday 2026 is a useful time to compare modem features and choose a model that fits your current and planned internet service.
For Black Friday 2026, the NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem and ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem are two strong choices for cable internet, each offering a 2.5GbE port. The S34 adds a second Ethernet port, while the CM2050 is a focused single-port option. The right buy depends on provider approval, your internet plan, and how you connect a router or other wired gear.
I researched and compared specs, reviews and owner feedback to make the choice easier. The short version: choose the ARRIS SURFboard S34 for flexible wired connections, and consider the NETGEAR Nighthawk CM2050 when your ISP supports it and a single multi-gig port meets your needs. The picks below cover seven DOCSIS 3.1 modems, from straightforward upgrades to options for higher-speed plans.
How We Picked
- DOCSIS standard and stated Ethernet speeds, with attention to multi-gig connections.
- ISP approval and the need to verify model compatibility directly with a cable provider.
- Number and speed of Ethernet ports for connecting a router or wired network equipment.
- Owner feedback and product specifications, without treating advertised maximum speeds as guaranteed plan performance.
- Fit for distinct shoppers, including value-minded households, premium upgrades and homes that need voice service.
Comparison Table
| Product | Best for | DOCSIS | Ethernet ports | Voice service |
|---|---|---|---|---|
| NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem | One multi-gig connection | 3.1 | 1 × 2.5GbE | No |
| ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem | Flexible wired connections | 3.1 | 1 × 2.5GbE, 1 × 1GbE | No |
| NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem | Premium high-split upgrade | 3.1 | 1 × 2.5GbE, 1 × 1GbE | No |
| ARRIS SURFboard S33 DOCSIS 3.1 Cable Modem | Value-focused two-port setup | 3.1 | 1 × 2.5GbE, 1 × 1GbE | No |
| ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem | Standard cable plans | 3.1 | 2 × 1GbE | No |
| Motorola MB8611 DOCSIS 3.1 Cable Modem | A single multi-gig router link | 3.1 | 1 × 2.5GbE | No |
| Hitron CODA56 DOCSIS 3.1 Cable Modem | A simple multi-gig connection | 3.1 | 1 × 2.5GbE | No |
Best Picks Reviewed
#1
NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem
The NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem is the best single-port multi-gig pick for cable customers whose ISP approves it. One 2.5GbE port gives a compatible router a wired path beyond standard gigabit Ethernet.
Best for: One multi-gig connection and a compatible cable provider
- DOCSIS
- 3.1
- Ethernet port
- 1 × 2.5GbE
- DOCSIS 3.0 channels
- 32 × 8
- Voice service
- No
- 2.5GbE port suits a multi-gig router connection.
- DOCSIS 3.1 supports current cable network standards.
- Simple one-port setup for a single router.
- Only one Ethernet port is available.
- Provider compatibility and approved plan speeds vary.
Is the NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem worth buying on Black Friday 2026?
The NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem is worth considering for an ISP-approved cable plan that benefits from its 2.5GbE port. Confirm provider support and plan limits before choosing it over a modem with extra Ethernet ports.
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#2 · Top pick
ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem
The ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem is the best overall choice for households that want flexible wired connections. The modem includes one 2.5GbE port and one 1GbE port for a multi-gig router and another wired device.
Best for: Most cable households seeking multi-gig connectivity
- DOCSIS
- 3.1
- Ethernet ports
- 1 × 2.5GbE, 1 × 1GbE
- DOCSIS 3.0 channels
- 32 × 8
- Voice service
- No
- Offers both 2.5GbE and 1GbE connections.
- DOCSIS 3.1 suits many current cable plans.
- Useful port selection for a router and wired equipment.
- Not a Wi-Fi router.
- Compatibility depends on the cable provider.
Is the ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem worth buying on Black Friday 2026?
The ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem is a strong Black Friday 2026 choice for cable customers who want a 2.5GbE router connection plus a separate 1GbE port. Check your provider’s approved-device list before ordering.
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#3
NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem
The NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem is the best premium pick for customers seeking a newer high-split modem platform. The NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem's 2.5GbE port supports a multi-gig wired connection when the ISP and internet plan support it.
Best for: Premium cable upgrades and high-split service
- DOCSIS
- 3.1
- Ethernet ports
- 1 × 2.5GbE, 1 × 1GbE
- High-split support
- Yes
- Voice service
- No
- High-split support suits compatible cable networks.
- Includes a 2.5GbE connection.
- Provides an additional 1GbE port.
- Premium features are useful only on compatible service.
- Verify provider approval before purchase.
Is the NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem worth buying on Black Friday 2026?
The NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem is worth considering when your cable provider supports the modem’s high-split features. The NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem's 2.5GbE and 1GbE ports offer flexible wired connections, but provider approval remains essential.
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#4
ARRIS SURFboard S33 DOCSIS 3.1 Cable Modem
The ARRIS SURFboard S33 DOCSIS 3.1 Cable Modem is the best value-focused pick for shoppers who want a compact modem with a multi-gig port. One 2.5GbE port connects to a compatible router, while a second 1GbE port supports another wired device.
Best for: Value-focused homes that want two Ethernet ports
- DOCSIS
- 3.1
- Ethernet ports
- 1 × 2.5GbE, 1 × 1GbE
- DOCSIS 3.0 channels
- 32 × 8
- Voice service
- No
- Combines a 2.5GbE port with a 1GbE port.
- DOCSIS 3.1 supports a broad range of cable plans.
- Compact option for a straightforward modem replacement.
- Does not provide Wi-Fi.
- Confirm speed-tier approval with your ISP.
Is the ARRIS SURFboard S33 DOCSIS 3.1 Cable Modem worth buying on Black Friday 2026?
The ARRIS SURFboard S33 DOCSIS 3.1 Cable Modem is a sensible value-focused choice when its two-port layout suits your setup. The ARRIS SURFboard S33 DOCSIS 3.1 Cable Modem's 2.5GbE port handles a compatible multi-gig router connection, subject to provider approval and plan limits.
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#5
ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem
The ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem is the best basic upgrade for households with a gigabit-class cable plan and standard wired needs. Two 1GbE ports offer more connection options than a single-port modem.
Best for: Standard cable plans and basic wired setups
- DOCSIS
- 3.1
- Ethernet ports
- 2 × 1GbE
- DOCSIS 3.0 channels
- 32 × 8
- Voice service
- No
- Two gigabit Ethernet ports.
- DOCSIS 3.1 hardware for cable service.
- Straightforward choice for a standard modem-and-router setup.
- No 2.5GbE port.
- Provider approval and plan eligibility still apply.
Is the ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem worth buying on Black Friday 2026?
The ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem is a good fit for approved plans that do not need a 2.5GbE connection. Choose a newer multi-gig model if your router, provider and plan are ready for speeds above gigabit.
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#6
Motorola MB8611 DOCSIS 3.1 Cable Modem
The Motorola MB8611 DOCSIS 3.1 Cable Modem is the best straightforward single-port upgrade for cable customers who want one fast router connection. The Motorola MB8611 DOCSIS 3.1 Cable Modem's 2.5GbE Ethernet port supports multi-gig networking when the plan and provider allow it.
Best for: A single wired link to a multi-gig router
- DOCSIS
- 3.1
- Ethernet port
- 1 × 2.5GbE
- DOCSIS 3.0 channels
- 32 × 8
- Voice service
- No
- 2.5GbE port supports multi-gig router links.
- Simple setup for a single-router network.
- DOCSIS 3.1 cable modem standard.
- One Ethernet port limits direct wired connections.
- Provider support differs by plan and region.
Is the Motorola MB8611 DOCSIS 3.1 Cable Modem worth buying on Black Friday 2026?
The Motorola MB8611 DOCSIS 3.1 Cable Modem is a strong option for an approved cable plan and a router with a 2.5GbE WAN port. The Motorola MB8611 DOCSIS 3.1 Cable Modem's single Ethernet connection is best for homes that do not need several devices plugged into the modem.
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#7
Hitron CODA56 DOCSIS 3.1 Cable Modem
The Hitron CODA56 DOCSIS 3.1 Cable Modem is the best simple multi-gig alternative for households whose cable provider approves the model. One 2.5GbE port connects the modem to a compatible router or network gateway.
Best for: A simple multi-gig setup on a supported cable network
- DOCSIS
- 3.1
- Ethernet port
- 1 × 2.5GbE
- DOCSIS 3.0 channels
- 32 × 8
- Voice service
- No
- 2.5GbE connection for a compatible router.
- DOCSIS 3.1 cable modem support.
- Simple single-port arrangement.
- Only one Ethernet port.
- Provider compatibility needs confirmation.
Is the Hitron CODA56 DOCSIS 3.1 Cable Modem worth buying on Black Friday 2026?
The Hitron CODA56 DOCSIS 3.1 Cable Modem is worth a look when your provider lists it as approved and you need one 2.5GbE connection. Compare supported speed tiers and return terms with other compatible modems before buying.
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NETGEAR CM2050 vs ARRIS SURFboard S34: which modem is better?
The ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem is the better fit for most homes needing two Ethernet connections, while the NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem is a clean single-port choice. Both modems include a 2.5GbE port, so both connect to compatible multi-gig routers.
The S34 has an additional 1GbE port for another wired device, while the CM2050 keeps the modem connection simple with one Ethernet port. A second port does not guarantee that an ISP supports two independent internet connections, so check the product documentation and provider guidance for your intended setup.
The easy recommendation is the S34 for households that value port flexibility. Choose the CM2050 when your provider approves it, your network uses a single router, and the extra Ethernet connection on the S34 does not matter.
Do the NETGEAR CM2050 and ARRIS SURFboard S34 work with every cable ISP?
The NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem and ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem require provider approval, and neither is guaranteed to work with every cable ISP. Compatibility can differ by service area, internet plan and provider equipment rules.
Check the ISP’s current approved-device list before buying, then confirm the modem supports your exact plan tier. Ask whether the provider needs the modem’s model number, MAC address or activation details during setup. A general brand compatibility claim is not a substitute for checking the precise model.
A provider-approved modem can reduce rental costs when the provider permits customer-owned equipment, but the modem does not include Wi-Fi. Keep a separate router in your budget and confirm that its WAN port matches the modem’s Ethernet speed.
Does a 2.5GbE modem port make internet faster?
A 2.5GbE port on the ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem or NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem supports a wired connection above gigabit Ethernet, but only when the internet plan, ISP network, router and connected equipment also support that speed.
A modem’s port rating is not the same as a guaranteed download speed. Actual performance depends on the subscribed plan, network conditions, router capacity, Ethernet cable and the device receiving the connection. A gigabit router limits a multi-gig modem connection to the router’s own capabilities.
For many households, the main advantage is avoiding a gigabit Ethernet bottleneck when upgrading to a faster plan. Shoppers on a plan below gigabit can still use a 2.5GbE modem, but the extra port capacity does not raise the plan’s speed.
Should you buy a modem with voice service?
The NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem, ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem and other standard picks in this guide do not provide a phone jack for cable voice service. Households that bundle a landline with internet should check for a voice-capable modem before replacing provider equipment.
NETGEAR sells voice-focused models in its cable modem range, including the CM2050V, but a voice model is a different product from the CM2050. Confirm the exact model name and provider approval rather than relying on similar packaging or a familiar series name.
Cable phone service often requires equipment certified by the ISP. Ask the provider about voice support, emergency-service features and setup before choosing a modem. If the household only uses mobile phones or internet calling through a separate service, a standard modem can be a simpler fit.
What should Black Friday 2026 modem shoppers prioritize?
The ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem is a strong Black Friday 2026 all-round pick, while the NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem is a good single-port alternative. ISP approval, plan support and the right Ethernet connection matter more than a product’s headline speed.
Compare the modem’s port count with your network. A 2.5GbE port suits a multi-gig router, while a pair of gigabit ports fits many standard setups. Check whether a modem includes voice support only when your cable plan includes phone service.
Best bet: choose an approved model that meets your current plan and router needs, then compare Black Friday 2026 listings using the full model number. Keep the receipt and review the return policy in case the ISP rejects the device or activation fails.
Buying Guide
Confirm your ISP and plan
Look up the exact modem model on your cable provider’s approved-device list. Confirm your subscribed speed tier, service-area support and activation requirements. A DOCSIS 3.1 label alone does not establish provider approval.
Match Ethernet ports to your router
Pick a modem port that matches the router’s WAN port. A 2.5GbE modem connected to a gigabit-only router does not deliver a multi-gig wired link. Count ports only when you have a clear use for each one.
Decide whether you need phone service
Standard cable modems in this guide do not provide cable voice. Households with an ISP landline need a compatible voice modem and should confirm support before replacing rented equipment.
Remember the Wi-Fi router
Cable modems connect to the cable network; they do not create a home Wi-Fi network. Reuse a compatible router or select one with WAN speed that matches the modem and your plan.
Compare Black Friday listings carefully
Use the full brand and model name when comparing Black Friday 2026 listings. Check the included power adapter, warranty, return terms and product condition, and avoid confusing standard and voice-enabled versions.
FAQ
NETGEAR CM2050 vs ARRIS SURFboard S34: which should I buy?
The ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem is the better pick for two Ethernet ports, with one 2.5GbE and one 1GbE connection. The NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem suits a simpler single-router setup.
Does the ARRIS SURFboard S34 have a 2.5GbE port?
Yes. The ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem has one 2.5GbE port and one 1GbE port. Multi-gig performance still depends on ISP approval, plan speed, router capability and the equipment connected to the network.
Is the NETGEAR CM2050 a router?
No. The NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem connects to cable internet and provides one 2.5GbE Ethernet port. A separate Wi-Fi router is needed for wireless networking unless your home uses another compatible gateway.
Will a DOCSIS 3.1 modem work with my cable provider?
The ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem and NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem work only when approved for your provider and plan. Check the ISP’s model list and speed-tier details before purchasing or activating a modem.
Is a 2.5GbE modem worth choosing for a gigabit plan?
A 2.5GbE modem port offers room for a compatible router upgrade, but does not increase a gigabit plan’s service speed. The ARRIS SURFboard S34 DOCSIS 3.1 Cable Modem is useful when your router or future plan needs that faster Ethernet connection.
Do any modems in this guide support cable phone service?
No standard modem in this guide lists cable voice support. The NETGEAR Nighthawk CM2050 DOCSIS 3.1 Cable Modem is not the voice-enabled CM2050V. Households with cable phone service should verify a voice-capable model with their ISP.