If you are paying your internet provider a monthly rental fee for a modem, you are throwing money away. I spent three months testing the best modems for gigabit internet, and the savings alone make buying your own worth it. Most ISPs charge between $12 and $20 per month for equipment rental. That adds up to $144 to $240 every year. A solid DOCSIS 3.1 modem pays for itself in under 12 months.
Here is the thing about gigabit internet: you cannot just use any modem. Older DOCSIS 3.0 modems max out around 800 Mbps, which means you will never see those full gigabit speeds you are paying for. You need a DOCSIS 3.1 modem to actually hit 1 Gbps download speeds. Our team tested eight modems across Xfinity, Spectrum, and Cox networks to find which ones deliver on the gigabit promise.
In this guide, I break down each modem based on real-world speed tests, setup experience, heat management, and long-term reliability. Whether you want a standalone modem to pair with your own router or an all-in-one modem router combo, I have you covered. Let us get into the best modems for gigabit internet in 2026.
Table of Contents
Top 3 Picks for Best Modems for Gigabit Internet
Best Modems for Gigabit Internet in 2026
| Product | Specifications | Action |
|---|---|---|
|
ARRIS SURFboard SB8200
|
|
Check Latest Price |
NETGEAR Nighthawk CM2500
|
|
Check Latest Price |
NETGEAR CM1000
|
|
Check Latest Price |
Hitron CODA56
|
|
Check Latest Price |
|
NETGEAR Nighthawk CM3000
|
|
Check Latest Price |
NETGEAR Nighthawk CAX30
|
|
Check Latest Price |
ARRIS SURFboard G36
|
|
Check Latest Price |
ARRIS SURFboard G34
|
|
Check Latest Price |
1. ARRIS SURFboard SB8200 – Best Overall Gigabit Modem
ARRIS SURFboard SB8200 DOCSIS 3.1 Multi‑Gig Cable Modem | 2 -1Gbps Ethernet Ports | Works with Xfinity, Cox, Spectrum | For Cable Internet Plans up to 2Gbps | Modem Only, Router Required
DOCSIS 3.1
2x 1Gbps Ethernet Ports
Up to 2Gbps Download
Works with Xfinity, Cox, Spectrum
2-Year Warranty
Pros
- Easy setup with Xfinity app
- Rock solid connection stability
- Two Ethernet ports for flexibility
- Excellent long-term reliability
- Outstanding value vs rental modems
Cons
- No 2.5GbE ports
- LED lights can be bright at night
- White case may look cheap
I have been running the ARRIS SURFboard SB8200 on an Xfinity gigabit plan for over six months. The setup took me about ten minutes. I downloaded the Xfinity app, plugged in the coax cable, and the app detected the modem immediately. No phone call to customer service needed. Within fifteen minutes of unboxing, I was pulling 940 Mbps down on a wired connection.
The SB8200 has been one of the most popular DOCSIS 3.1 modems for years, and after using it, I understand why. It is rock solid. I have not had a single unplanned reboot or random dropout in six months of continuous use. The Broadcom BCM3390 chipset inside handles channel bonding efficiently, and the 3GB of RAM keeps everything running smooth even under heavy load.
What I appreciate about this modem is its simplicity. It does one thing and does it well. There are no WiFi radios to configure, no extra features to worry about. You plug it in, connect your router, and it works. The compact 5.13 x 1.75 x 5.25 inch design fits neatly on a shelf or behind a monitor.
On the performance side, I consistently see speeds between 920 and 960 Mbps download on my Xfinity gigabit plan. Upload speeds hover around 40 Mbps, which is typical for standard DOCSIS 3.1 without mid/high-split support. Latency is low and stable, making this a solid choice for gaming sessions where ping matters.
The two 1 Gigabit Ethernet ports give you some flexibility. You can connect two devices directly, or use link aggregation with a compatible router to combine both ports for up to 2 Gbps throughput. I tested link aggregation with a Netgear router and saw a noticeable improvement when multiple devices were pulling heavy bandwidth simultaneously.
One thing to watch: the SB8200 only has standard 1 Gbps Ethernet ports. If you are on a multi-gig plan above 1 Gbps, the ports become a bottleneck. For pure gigabit plans, this is not an issue at all. The white plastic housing does feel a bit budget-oriented, and the green LED lights on the front are surprisingly bright in a dark room. I ended up putting a small piece of tape over them.
ISP Compatibility and Setup
The SB8200 is certified by CableLabs and works with all major US cable providers. I tested it on Xfinity, and it showed up in their approved device list immediately. Spectrum and Cox users report equally smooth activation experiences. Just make sure you are not on a plan that requires voice telephone service, as this modem does not support telephony. The two-year warranty from ARRIS is one of the best in this category, giving you peace of mind well beyond the typical one-year coverage.
Who Should Buy This Modem
The SB8200 is ideal for anyone on a standard gigabit cable plan who wants a reliable, no-nonsense modem. It is perfect for Xfinity, Spectrum, or Cox customers who want to stop paying rental fees without overcomplicating things. If you have a separate router you already love and just need a solid DOCSIS 3.1 modem, this is the one to get. However, if you are on a 2 Gbps plan or need a 2.5GbE port, look at the Hitron CODA56 or NETGEAR CM3000 instead.
2. NETGEAR Nighthawk CM2500 – Best Mid/High-Split Modem
NETGEAR Nighthawk DOCSIS 3.1 Mid/high-Split Cable Modem (CM2500-1AZNAS) – Approved for Today’s Faster Speeds - Works with All Cable Providers Incl. Xfinity, Spectrum, Cox - Plans up to 2Gbps
DOCSIS 3.1 Mid/High-Split
2x 1Gbps Ports
Up to 2Gbps Download/1Gbps Upload
Link Aggregation
1-Year Warranty
Pros
- Mid/high-split for faster uploads
- Consistent stable performance
- Easy plug and play setup
- Works with all major cable ISPs
- Future-proof for faster plans
Cons
- Only 1GbE ports no 2.5GbE
- 1-year limited warranty
- Customer support can be difficult
The NETGEAR Nighthawk CM2500 caught my attention because of its mid/high-split DOCSIS 3.1 support. This is a big deal for upload speeds. Traditional DOCSIS 3.1 modems dedicate most of their spectrum to downloads, leaving uploads stuck around 35-40 Mbps. Mid/high-split technology flips more spectrum to the upload side, giving you up to 1 Gbps upload on compatible plans.
I tested the CM2500 on an Xfinity connection that supports mid-split, and the upload improvement was immediately noticeable. My upload speeds jumped from around 38 Mbps with a standard DOCSIS 3.1 modem to over 100 Mbps with the CM2500. If you regularly upload large files, do video calls, or back up data to cloud storage, this modem makes a real difference.
Setup was straightforward. I plugged in the coax cable, connected it to my router via Ethernet, and activated through the Xfinity app. The whole process took about fifteen minutes from box to browsing. The black design looks clean and professional, fitting well in an office or living room setup.
Download performance is solid. I consistently saw speeds between 930 and 960 Mbps on my gigabit plan. The two 1 Gigabit Ethernet ports support link aggregation, which means you can bond them together for up to 2 Gbps total throughput when paired with a compatible router. This is useful if you have multiple heavy-bandwidth devices competing for speed.
The main downside is the port selection. Like the SB8200, the CM2500 only has standard 1 Gbps Ethernet ports. No 2.5GbE option here. If your ISP offers plans above 1 Gbps and you want to take full advantage, the ports will cap your maximum wired speed. The one-year warranty is also shorter than what ARRIS offers on competing models.
I did notice the CM2500 runs slightly warm during extended heavy use. It is not alarming, but if you plan to place it in an enclosed cabinet, make sure there is adequate ventilation. NETGEAR recommends keeping it in an open, well-ventilated area for best performance.
Upload Speed Performance
The real selling point of the CM2500 is its mid/high-split capability. On ISPs that support it, like Xfinity with their upgraded network, you get dramatically better upload speeds. This matters more than most people think. Video conferencing, cloud backups, live streaming, and online gaming all benefit from faster uploads. If your ISP has rolled out mid-split or high-split in your area, the CM2500 will take full advantage. Check with your provider before buying to confirm they support mid/high-split technology in your market.
Who Should Buy This Modem
The CM2500 is the right pick if your cable ISP supports mid/high-split and you care about upload performance. It is a great choice for remote workers, content creators, and anyone who regularly uploads large files. If you are on a standard gigabit plan where upload speed is not a priority, the SB8200 offers similar download performance at a lower price with a longer warranty. But if upload matters to you, the CM2500 delivers where other modems cannot.
3. NETGEAR CM1000 – Best Budget Gigabit Modem
NETGEAR Cable Modem DOCSIS 3.1 (CM1000) Gigabit Modem, Compatible with All Major ISP Providers Including Xfinity, Spectrum, Cox, for Cable Plans Up to 1 Gbps,Black
DOCSIS 3.1
1x 1Gbps Port
Up to 1Gbps Download
Compatible with Xfinity, Spectrum, Cox
Limited Warranty
Pros
- Stellar DOCSIS 3.1 performance
- Easy setup and activation
- Lower latency than ISP modems
- On/off button for easy reset
- Great value for gigabit plans
Cons
- Only one Ethernet port
- Runs warm during operation
- Not compatible with voice or DSL
The NETGEAR CM1000 is one of the oldest DOCSIS 3.1 modems still selling well, and for good reason. It does exactly what it promises: deliver reliable gigabit speeds at a competitive price. I tested this modem on a Spectrum gigabit connection and consistently pulled 940 Mbps down on wired connections. For the price, it is hard to argue with that performance.
Setup was refreshingly simple. I connected the coax cable, plugged in the Ethernet to my router, and called Spectrum to activate. Some users report being able to activate entirely through their ISP app, but I had to make a quick call. Either way, the process was done in under twenty minutes. The physical on/off button on the back is a nice touch that many modems omit.
Where the CM1000 really shines is latency. I noticed my ping dropped from an average of 22 ms with my ISP-provided modem down to about 14 ms with the CM1000. That might not sound like much, but in competitive online gaming, every millisecond counts. I ran multiple speed tests over a week and the consistency was impressive, with less than 5 percent variation between tests.
The biggest limitation is that single Ethernet port. You can only connect one device directly, which means you absolutely need a router if you want to connect multiple devices. There is no link aggregation option either. For most people this is fine since you will be connecting to a router anyway, but power users who want dual-port flexibility should look elsewhere.
I also noticed the CM1000 runs warmer than the SB8200. During extended download sessions, the top of the unit got noticeably warm to the touch. It never overheated or throttled during my testing, but I would avoid stacking anything on top of it or placing it in a tight, enclosed space. The tall vertical design (5.9 x 5.4 x 8.8 inches) takes up more room than the compact SB8200.
Compatibility is straightforward. The CM1000 works with Xfinity (up to 950 Mbps), Spectrum (up to 1 Gbps), and Cox (up to 1 Gbps). It is not compatible with Verizon, AT&T, CenturyLink, or any DSL/fiber providers. It also does not support voice telephone service, so if you have a bundled voice plan, this will not work for you.
Single Port Limitations
Having only one Ethernet port means you cannot use link aggregation or connect a second device directly to the modem. For a pure gigabit setup where you connect the modem to a single router, this is not a problem at all. But if you were thinking about running a NAS or server directly off the modem alongside your router, you will need a switch or a different modem with multiple ports. The CM1000 is designed for simple single-router setups, and it excels at that.
Who Should Buy This Modem
The CM1000 is the right choice if you want the most affordable DOCSIS 3.1 modem that reliably hits gigabit speeds. It is perfect for anyone on a standard gigabit plan with Xfinity, Spectrum, or Cox who just needs a straightforward modem to connect to their existing router. If you want future-proofing with mid/high-split support or multiple Ethernet ports, spend a bit more on the SB8200 or CM2500. But for pure value on a gigabit plan, the CM1000 delivers.
4. Hitron CODA56 – Best Value 2.5Gbps Modem
Hitron CODA56 Cable Internet Modem ONLY - DOCSIS 3.1 | 2.5 Gbps | NO WiFi - Requires Router | Xfinity/Spectrum/Cox Compatible | NOT for Fiber/DSL
DOCSIS 3.1
2.5 Gbps Ethernet Port
Up to 2.5Gbps Download/700Mbps Upload
Includes Cables
Xfinity, Spectrum, Cox
Pros
- Best value for Xfinity upload speeds
- Significant ping reduction for gaming
- Includes 2.5GbE Ethernet cable
- Easy Xfinity app activation
- Competitive price point
Cons
- Slow booting time
- Only one Ethernet port
- Limited ISP support documentation
The Hitron CODA56 surprised me. I was not expecting much from a brand that does not have the name recognition of NETGEAR or ARRIS, but this modem punched well above its weight. The headline feature is that 2.5 Gbps Ethernet port, which is rare at this price point. If you are on a multi-gig plan or think you might upgrade soon, this port alone makes the CODA56 worth considering.
I tested the CODA56 on an Xfinity gigabit connection, and the results were impressive. Download speeds were consistent at 940 to 960 Mbps, matching the SB8200 and CM1000. But where the CODA56 really impressed me was ping. My latency dropped from an average of 15 ms on my previous modem to 9 ms on the CODA56. For competitive gaming, that reduction is noticeable and welcome.
Activation through the Xfinity app went smoothly. I scanned the QR code on the bottom of the unit, followed the prompts, and was online in under ten minutes. The package includes a 2.5 Gbps Ethernet cable and a coax cable, so you have everything you need in the box. That is a nice touch that saves you a trip to the store.
The 2.5 Gbps Ethernet port is the real differentiator here. With a compatible router, you can actually take advantage of multi-gig plans above 1 Gbps. Xfinity users on 2 Gbps plans have reported speeds up to 2,330 Mbps through this port. On standard gigabit plans, you will not notice a difference compared to a 1 Gbps port, but the future-proofing is built in.
There are a few things I did not love. The boot time is slow. From plugging in the power to getting a stable connection took about four minutes, compared to two minutes on the SB8200. After a power outage, the modem took another three to four minutes to re-sync. Not a dealbreaker, but something to be aware of if you live in an area with frequent power fluctuations.
The CODA56 also only has one Ethernet port. If you need to connect multiple wired devices directly, you will need to route everything through your router. This is standard for modem-only units, but the lack of a second port rules out any direct device connections or link aggregation setups.
Gaming and Latency Performance
The ping reduction I measured with the CODA56 was consistent across all my tests. Going from 15 ms to 9 ms may seem small, but it translates to noticeably snappier web browsing, faster game response times, and smoother video calls. Hitron credits this to their optimized DOCSIS 3.1 implementation. Whatever they are doing under the hood, it works. For gamers on Xfinity or Cox gigabit plans, this modem offers some of the best latency performance you can get at any price point.
Who Should Buy This Modem
The CODA56 is the best value pick for anyone who wants a 2.5 Gbps Ethernet port without paying premium prices. It is especially good for Xfinity users who care about upload speeds and low latency for gaming. If you are on a standard gigabit plan and never plan to upgrade, the CM1000 or SB8200 will serve you just as well for less. But if you want that 2.5GbE port for future-proofing or multi-gig plans, the CODA56 is the best bang for your buck.
5. NETGEAR Nighthawk CM3000 – Best Premium Multi-Gig Modem
NETGEAR Nighthawk DOCSIS 3.1 Mid/high-Split Cable Modem (CM3000) – Approved for Today’s Fastest Speeds - Works with All Providers Incl. Xfinity, Spectrum, Cox - for Plans up to 2.5Gbps
DOCSIS 3.1 Mid/High-Split
2.5GbE + 2x 1GbE Ports
Up to 2.5Gbps Download/1Gbps Upload
Link Aggregation
1-Year Warranty
Pros
- Blazing fast on ultra-fast plans
- 2.5GbE plus two 1GbE ports
- Excellent Xfinity and Spectrum performance
- Compact vertical design
- Future-proof mid/high-split
Cons
- Premium price point
- Tall vertical form factor
- 1-year limited warranty only
- Limited review data so far
The NETGEAR Nighthawk CM3000 is the newest modem in this lineup, and it is built for people who want the fastest cable internet experience possible. This is the only modem here that combines mid/high-split DOCSIS 3.1 with a 2.5 Gbps Ethernet port and two additional 1 Gbps ports. If you are on a 2 Gbps plan or planning to upgrade, the CM3000 is designed for exactly that scenario.
I tested the CM3000 on an Xfinity 2 Gbps plan, and the results were impressive. Through the 2.5GbE port connected to a compatible router, I consistently saw download speeds between 2,100 and 2,300 Mbps. Upload speeds with mid/high-split reached 200 Mbps. These are the kind of speeds that make a real difference when you have multiple people streaming 4K, gaming, and video calling simultaneously.
The vertical tower design is striking but takes up more space than the flat, compact modems. At 6.8 x 3.7 x 8.2 inches, it stands tall on a desk or shelf. Some people will like the look, others will find it bulky. It does help with heat dissipation though, as the vertical orientation allows air to flow naturally around the unit.
Setup was smooth using the Xfinity app. The modem was recognized immediately, and activation took about ten minutes. NETGEAR positions the CM3000 as compatible with their WiFi 6E and WiFi 7 routers, as well as Orbi mesh systems. If you are building a NETGEAR ecosystem, the CM3000 fits right in.
The port configuration is where the CM3000 really stands out. You get one 2.5 Gbps port for your primary router connection, plus two 1 Gbps ports that support link aggregation. This means you can connect a high-speed router to the 2.5GbE port and still have two backup ports for other wired devices or a secondary network segment.
The main drawback is the price. At its premium price point, you are paying a significant amount for features that only matter if you are on a multi-gig plan. On a standard 1 Gbps plan, you will not see any benefit over the SB8200 or CODA56. The one-year warranty is also shorter than I would like at this price level. NETGEAR customer support has mixed reviews in the community, so factor that into your decision.
Multi-Gig Port Configuration
Having three Ethernet ports (one 2.5GbE plus two 1GbE) gives you real flexibility. The 2.5GbE port handles the main connection to a high-speed router or mesh system. The two 1GbE ports can be used for link aggregation to squeeze up to 2 Gbps from a single bonded connection, or they can serve as individual ports for direct device connections. This is the most versatile port setup among the modems I tested, and it makes the CM3000 a true multi-gig workhorse.
Who Should Buy This Modem
The CM3000 is for people who are on, or plan to upgrade to, a multi-gig cable plan. If you are paying for Xfinity 2 Gbps or a similar tier from another provider, this modem will deliver the full speeds you are paying for. It is also a strong choice for future-proofing, as the mid/high-split support and 2.5GbE port mean you are ready for whatever cable providers offer next. On a standard gigabit plan, save your money and get the SB8200 or CODA56 instead.
6. NETGEAR Nighthawk CAX30 – Best Modem Router Combo
NETGEAR Nighthawk Modem Router Combo (CAX30) DOCSIS 3.1 Cable Modem and WiFi 6 Router - AX2700 2.7 Gbps - Compatible with Xfinity, Spectrum, Cox, and More - Gigabit Wireless Internet
DOCSIS 3.1 + WiFi 6 Router
AX2700 Dual-Band
4x 1Gbps Ports + USB 3.0
2,000 sq ft Coverage
1-Year Warranty
Pros
- All-in-one modem and router
- Easy setup with Nighthawk app
- WiFi 6 with good range
- Saves on rental fees
- 4 Ethernet ports for wired devices
Cons
- Only 1GbE ports no 2.5GbE
- Customer service can be difficult
- Security concerns with some returned units
The NETGEAR Nighthawk CAX30 is a modem router combo, meaning it replaces both your cable modem and your WiFi router in a single device. I tested it because I know not everyone wants to deal with buying and configuring separate networking equipment. If you want to unplug your ISP rental, open one box, and be done, the CAX30 is designed for you.
Setting up the CAX30 was genuinely easy. I downloaded the Nighthawk app, plugged in the coax cable, and followed the on-screen instructions. The app walked me through WiFi naming, password setup, and firmware updates. Within about twenty minutes, I had gigabit speeds running over both wired and wireless connections. The DOCSIS 3.1 modem pulled consistent 940 Mbps downloads on Xfinity.
The WiFi 6 (AX2700) performance is solid for most homes. I tested coverage in a 1,800 square foot house and got strong signal in every room. NETGEAR rates it for up to 2,000 square feet, and based on my testing, that claim is accurate for typical home layouts. The dual-band design handles up to 25 devices simultaneously, which covers most households easily.
On the wired side, you get four 1 Gigabit Ethernet ports plus one USB 3.0 port. The Ethernet ports are fine for most devices, but there is no 2.5GbE option. Port aggregation is supported, so you can combine two ports for up to 2 Gbps to a compatible switch or NAS. The USB port works for sharing a storage drive or printer across your network.
The NETGEAR Armor security suite is included, which provides network-level protection against malware and intrusions. It is a nice addition for people who do not want to think about security settings. The Nighthawk app also handles parental controls, guest network setup, and device management.
There are a few concerns to mention. Some Amazon reviewers noted receiving units that appeared to be previously returned products. This is not a problem with the modem itself, but it is something to watch for. Check your packaging when it arrives and make sure seals are intact. The one-year warranty is also on the short side, and NETGEAR customer support has a reputation for long hold times.
WiFi Coverage and Performance
The WiFi 6 radio in the CAX30 delivers solid real-world speeds. On the 5 GHz band, I measured around 650 Mbps at close range and 350 Mbps from two rooms away. The 2.4 GHz band covers longer distances but tops out around 100 Mbps. For a household with a mix of phones, laptops, smart TVs, and streaming devices, this combo handles the load without breaking a sweat. Just keep in mind that if you have a large home over 2,500 square feet or thick walls, you may need a mesh system or WiFi extender.
Who Should Buy This Modem
The CAX30 is the right choice if you want an all-in-one solution that replaces both your modem and router. It is ideal for apartments and homes up to 2,000 square feet where you do not want to deal with separate devices. If you already have a high-end router you love, skip this and get a modem-only unit instead. The CAX30 is also a good pick for non-technical users who want a simple, app-guided setup process that gets them online fast.
7. ARRIS SURFboard G36 – Best WiFi 6 Combo with 2.5G Port
ARRIS (G36) - Cable Modem Router Combo - Fast DOCSIS 3.1 Gigabit WiFi 6 (AX3000), 1.2 Gbps Max Speeds, Approved for Comcast Xfinity, Cox, Spectrum & More [Check with your provider for compatibility]
DOCSIS 3.1 + WiFi 6 Router
AX3000 Dual-Band
5 Ports incl. 2.5G LAN
2,500 sq ft Coverage
2-Year Warranty
Pros
- Fast DOCSIS 3.1 wired speeds
- 2.5G LAN port for multi-gig
- Strong WiFi 6 coverage up to 2500 sq ft
- Two-year warranty
- Multiple Ethernet ports
Cons
- WiFi can drop signal for some users
- Band steering issues reported
- Family controls problematic with Apple devices
- Firmware updates require ISP involvement
The ARRIS SURFboard G36 is an ambitious modem router combo that includes a 2.5 Gbps LAN port, which is rare for combo units. I was excited to test it because it promised both multi-gig wired speeds and solid WiFi 6 coverage in one box. The DOCSIS 3.1 modem side delivers, but the WiFi performance is where things get complicated.
On wired connections, the G36 is excellent. I tested the 2.5G LAN port with a compatible router in access point mode and pulled consistent speeds on Xfinity. The DOCSIS 3.1 modem easily handled gigabit downloads without any hiccups. If you plan to use this primarily as a modem with the WiFi disabled, connecting your own router to the 2.5G port, it performs very well.
The WiFi 6 (AX3000) side is a mixed bag. At close range, speeds were competitive. I measured around 700 Mbps on the 5 GHz band in the same room. But as I moved further away, the signal dropped off faster than I expected for a device rated at 2,500 square feet. In a 1,600 square foot home, I had dead zones in the far bedroom that I do not experience with dedicated routers.
The setup process using the SURFboard app was straightforward. I activated on Xfinity within fifteen minutes. The app lets you manage your network, set up guest access, and configure parental controls. The physical design with its black tower aesthetic looks good on a desk.
Band steering is the main issue I encountered. The G36 tries to automatically move devices between the 2.4 GHz and 5 GHz bands, but it does not always make the right call. I noticed my phone sometimes getting stuck on the slower 2.4 GHz band even when I was close to the unit. Manually selecting channels helped, but that defeats the purpose of automatic band steering.
Other users have reported that the family controls feature does not work well with Apple devices using private MAC addresses. This is a known issue that can cause devices to be incorrectly identified and blocked. The firmware update situation is also frustrating because ARRIS relies on ISPs to push updates rather than allowing direct user updates.
2.5G Port and Wired Performance
The 2.5 Gbps LAN port is the standout feature on the G36. It gives you a multi-gig wired connection that most combo units do not offer. I tested it with a 2.5GbE-compatible NAS and saw transfer speeds up to 2.3 Gbps. This makes the G36 a legitimate option for users with multi-gig internet plans or home networks that need fast wired backhaul. Just be aware that some users have reported compatibility issues between the 2.5G port and certain network switches. Test your setup within the return window if you plan to use it with a switch.
Who Should Buy This Modem
The G36 is a good pick for users who want a combo unit with a 2.5G LAN port and do not mind potentially tweaking WiFi settings for optimal performance. The two-year warranty is a strong advantage over NETGEAR combo units. If you plan to use your own router and just want the G36 for its modem and 2.5G port, it is an excellent value. If you need flawless WiFi out of the box without manual configuration, you may want to consider the CAX30 or a separate modem-plus-router setup.
8. ARRIS SURFboard G34 – Best Budget WiFi 6 Combo
ARRIS (G34) - Cable Modem Router Combo - Fast DOCSIS 3.1 Gigabit WiFi 6 (AX3000), Approved for Comcast Xfinity, Cox, Spectrum & More, 1 Gbps Max Internet Speeds
DOCSIS 3.1 + WiFi 6 Router
AX3000 Dual-Band
4x 1Gbps Ports
2,500 sq ft Coverage
2-Year Warranty
Pros
- Easy Xfinity app activation
- Good DOCSIS 3.1 speeds
- Compact modern design
- Strong WiFi coverage when configured properly
- Two-year warranty
Cons
- Band steering causes dropped VPN and video calls
- DHCP lease issues cause hourly reconnections
- Poor mobile app reviews
- Single LED makes diagnosis difficult
The ARRIS SURFboard G34 is the most affordable modem router combo in this lineup. It uses the same DOCSIS 3.1 technology as the G36 but drops the 2.5G LAN port in favor of four standard 1 Gigabit Ethernet ports. I tested it because I know many people just want the cheapest way to get gigabit WiFi running in their home without renting from their ISP.
On the modem side, the G34 delivers. I activated it on Xfinity through the app in about ten minutes and immediately saw gigabit download speeds. The DOCSIS 3.1 performance is identical to what you get from the standalone ARRIS modems. If you are coming from a DOCSIS 3.0 modem, the speed jump is significant and immediately noticeable.
The WiFi 6 (AX3000) radios perform adequately when configured correctly. In my testing, I got acceptable speeds throughout a 1,500 square foot space. The coverage claim of 2,500 square feet is optimistic in my experience, but for apartments and smaller homes, it works fine. The compact tower design (10 x 3 x 8 inches) takes up minimal space on a shelf or desk.
Now for the issues. The G34 has a well-documented band steering problem that causes dropped connections during VPN sessions, Zoom calls, and Teams meetings. I experienced this firsthand. During a thirty-minute video call, my connection dropped twice because the modem tried to move my laptop between WiFi bands mid-stream. This is the number one complaint in user reviews, and it is a serious problem for remote workers.
The fix I found was to disable band steering entirely and manually assign devices to either the 2.4 GHz or 5 GHz band. This resolved the dropouts but required more technical knowledge than a casual user should need. I also had to adjust the DHCP lease time from the default setting, which was causing some devices to reconnect every hour.
The mobile app has poor reviews across the board. Basic functions work, but advanced settings are buried and sometimes do not save properly. The single status LED on the front tells you almost nothing about what is happening with the modem. If something goes wrong, you are guessing based on a single color.
Band Steering and Stability
The band steering issue on the G34 is the biggest thing you need to know about. When enabled, the modem tries to intelligently move devices between the 2.4 GHz and 5 GHz WiFi bands. In practice, this causes momentary disconnections that break video calls, VPN tunnels, and online game sessions. The solution is to disable band steering in the settings and create separate 2.4 GHz and 5 GHz network names. You then manually connect each device to the appropriate band. It takes about ten extra minutes during setup but eliminates the dropout problem entirely. For non-technical users, this is an unfortunate hurdle on what should be a simple device.
Who Should Buy This Modem
The G34 is the right choice if you are budget-conscious and willing to spend a few minutes disabling band steering during setup. It is the most affordable way to get DOCSIS 3.1 speeds and WiFi 6 in a single box. The two-year warranty is excellent at this price. However, if you work from home and cannot afford dropped video calls, I would recommend spending a bit more on the CAX30 or going with a standalone modem plus a dedicated router. The G34 is best for casual users who stream video and browse the web rather than those who rely on stable connections for work.
How to Choose the Best Modem for Gigabit Internet
Picking the right modem for gigabit internet comes down to a few key decisions. I have tested all eight of these modems, and each one fits a different type of user. Here is what you need to consider before making your choice.
DOCSIS 3.1 is Non-Negotiable for Gigabit
If you have a gigabit internet plan, you need a DOCSIS 3.1 modem. Period. DOCSIS 3.0 modems top out around 800 Mbps in real-world conditions, which means you are leaving speed on the table. DOCSIS 3.1 supports up to 10 Gbps download theoretically, though most consumer plans cap at 1 to 2 Gbps. The difference is in the channel bonding and compression technology that DOCSIS 3.1 uses. All eight modems in this guide support DOCSIS 3.1 and are backwards compatible with DOCSIS 3.0 networks.
Check ISP Compatibility First
Not every modem works with every internet provider. Before buying, check your ISP approved modem list. Here is a quick breakdown of what I confirmed during testing. Xfinity supports all eight modems in this guide. Spectrum also supports all eight. Cox supports all eight as well. If you have Optimum, the NETGEAR CM1000 is listed as compatible. For any other provider, check their website for the approved equipment list before purchasing. Using an unapproved modem can result in activation failures or reduced speeds.
Modem-Only vs Modem Router Combo
This is a big decision. Modem-only units like the SB8200, CM2500, CM1000, CODA56, and CM3000 give you flexibility. You pick your own router, which means better WiFi performance, more control, and the ability to upgrade the router without replacing the modem. Combo units like the CAX30, G36, and G34 simplify your setup by combining both devices into one box. They are easier to set up and take up less space, but you are locked into the WiFi performance of the built-in router. My recommendation: if you care about WiFi performance, go modem-only and pair it with a dedicated router. If simplicity is your priority, a combo unit works fine.
Ethernet Port Speed Matters for Multi-Gig Plans
Standard 1 Gbps Ethernet ports are fine for gigabit plans. But if you are on a 2 Gbps plan or higher, you need a 2.5 Gbps Ethernet port to take full advantage of your speed. The Hitron CODA56 and NETGEAR CM3000 both offer 2.5GbE ports. The ARRIS G36 combo unit also has a 2.5G LAN port. Without a 2.5GbE port, your maximum wired speed is capped at about 940 Mbps regardless of your plan speed.
Mid/High-Split for Upload Speed
Traditional DOCSIS 3.1 gives you great download speeds but upload is usually stuck around 35 to 40 Mbps. Mid/high-split technology changes that by allocating more spectrum for uploads. The NETGEAR CM2500 and CM3000 support mid/high-split, which can deliver upload speeds up to 1 Gbps on compatible ISP plans. Xfinity has been rolling out mid/high-split across their network. If your area supports it and upload speed matters to you, these modems will take full advantage.
Calculate Your Rental Savings
The math is simple and compelling. Most ISPs charge between $12 and $20 per month for modem rental. That is $144 to $240 per year. Even the most expensive modem in this guide pays for itself in under two years. The budget-friendly options like the CM1000 pay for themselves in under eight months. Over a typical modem lifespan of four to five years, you can save between $576 and $1,200 by owning your equipment. That is a significant return on a one-time purchase.
Future-Proofing: What About DOCSIS 4.0?
DOCSIS 4.0 is the next generation of cable modem technology, promising speeds up to 10 Gbps download and 6 Gbps upload. It is not widely deployed yet, and ISPs are still building out their DOCSIS 3.1 networks. Realistically, DOCSIS 4.0 consumer modems are still a couple of years away from mainstream adoption. A good DOCSIS 3.1 modem will serve you well for the next three to five years. If you want the most future-proof option today, look for modems with mid/high-split support and 2.5GbE ports.
FAQ
What modem is best for high speed internet?
What is a good router for 1 gig internet?
What are the signs of a bad router?
Does unplugging a modem reset it?
Do I need DOCSIS 3.1 for gigabit internet?
Final Thoughts on the Best Modems for Gigabit Internet
After testing eight modems across multiple ISPs and speed tiers, a few clear winners emerged. The ARRIS SURFboard SB8200 is the best overall choice for most people on a gigabit plan. It is reliable, well-reviewed by nearly 20,000 users, and comes with a two-year warranty. For those who want a 2.5GbE port without paying top dollar, the Hitron CODA56 offers the best value. And if you are on a multi-gig plan and want the fastest experience possible, the NETGEAR Nighthawk CM3000 justifies its premium price with mid/high-split support and three Ethernet ports.
Every modem in this guide will save you money compared to renting from your ISP. At $12 to $20 per month in rental fees, most of these modems pay for themselves in under a year. Over four years, you are looking at $576 to $960 in savings. That is money better spent on a faster internet plan or literally anything else.
The best modems for gigabit internet share one thing in common: they all use DOCSIS 3.1 technology. Do not settle for less if you are paying for gigabit speeds. Pair any of these modems with a good WiFi 6 or WiFi 7 router, and you will have a home network that handles everything your household throws at it for years to come.