Best Modems for Cox Go Super Fast Plan (1 Gbps)
The Cox Go Super Fast plan delivers download speeds up to 1 Gbps for $100 per month. It is one of the fastest tiers Cox offers and a solid choice for households with six or more connected devices, remote workers, or anyone who regularly streams 4K video and downloads large files.
To actually reach those gigabit speeds, you need the right modem. Cox charges a monthly rental fee for its equipment, and buying your own modem pays for itself within a year. More importantly, not every modem can keep up with a 1 Gbps plan. You need a DOCSIS 3.1 modem, and ideally one with a 2.5 Gbps Ethernet port, to avoid limiting your speeds at the hardware level.
This guide covers the best modems compatible with the Cox Go Super Fast plan so you can get the full speed you are paying for.
Key Takeaways
- You need a DOCSIS 3.1 modem to get full gigabit speeds on the Cox Go Super Fast plan. DOCSIS 3.0 modems cannot keep up with 1 Gbps.
- A modem with a 2.5 Gbps Ethernet port prevents your wired connection from bottlenecking at the standard 1 Gbps Ethernet limit.
- Buying your own modem instead of renting from Cox saves you an average of $150 or more over two years.
What to Look for in a Cox Go Super Fast Modem
Before jumping into product picks, here is a quick breakdown of the specs that matter for this plan.
DOCSIS 3.1 Is Required
DOCSIS 3.1 is the cable modem standard that supports multi-gigabit speeds. Older DOCSIS 3.0 modems max out around 600 to 700 Mbps in real-world use, which means they will bottleneck a 1 Gbps plan. Cox requires DOCSIS 3.1 for its gigabit tier, so this is non-negotiable.
Why the Ethernet Port Matters
Most modems come with a standard Gigabit Ethernet port, which caps wired speeds at roughly 940 Mbps. That is close to 1 Gbps, but it still creates a ceiling. A modem with a 2.5 Gbps Ethernet port removes that limitation entirely and gives your connection room to deliver the full speed Cox provisions, which is often slightly above the advertised 1 Gbps.
Check the Cox Approved Modem List
Cox maintains a list of approved modems for each plan tier. Using a modem that is not on the list can result in activation issues or limited support from Cox. All of the modems recommended below are compatible with the Cox Go Super Fast plan, but it is always a good idea to double check the Cox website before purchasing.
Best Modems for Cox Go Super Fast
1. Motorola MB8611
The Motorola MB8611 is one of the best all-around modems for Cox gigabit plans. It is a DOCSIS 3.1 modem with a 2.5 Gbps Ethernet port, which means it will not bottleneck your 1 Gbps connection. It supports 32x8 OFDM channels and has a compact, well-ventilated design that runs cool. Setup is straightforward, and Cox activation is typically smooth.
Best for: Most households on the Go Super Fast plan who want a reliable, future-proof modem.
View Motorola MB8611 on ModemGuides
2. ARRIS SURFboard S33
The ARRIS S33 is another top-tier DOCSIS 3.1 modem with a 2.5 Gbps Ethernet port. It supports 2x2 OFDMA channels and delivers consistent gigabit performance. The S33 is a newer design from ARRIS and tends to run very stable on Cox networks. It is a standalone modem, so you will need a separate router.
Best for: Users who want a premium standalone modem with reliable Cox compatibility.
3. Netgear CM2000
The Netgear CM2000 is a high-performance DOCSIS 3.1 modem built for multi-gigabit plans. It features a 2.5 Gbps Ethernet port and supports speeds up to 2.5 Gbps on paper. For the Cox Go Super Fast plan, it delivers the full 1 Gbps without issue. It is one of the more future-proof options if you ever upgrade to a faster Cox tier.
Best for: Users who want headroom for future speed upgrades beyond 1 Gbps.
View Netgear CM2000 on ModemGuides
4. ARRIS SURFboard SB8200
The ARRIS SB8200 is one of the most popular DOCSIS 3.1 modems on the market. It has two Gigabit Ethernet ports with link aggregation support. While it does not have a 2.5 Gbps port, it still handles the Cox Go Super Fast plan effectively. It has been on the market for several years, which means it is well-tested and widely supported.
Best for: Budget-conscious buyers who want a dependable DOCSIS 3.1 modem without paying a premium.
View ARRIS SB8200 on ModemGuides
5. Netgear CM1200
The Netgear CM1200 is a DOCSIS 3.1 modem with four Gigabit Ethernet ports. It supports link aggregation and is designed for high-speed cable plans. The four ports give you more flexibility for direct wired connections, though most users will still connect it to a router. It is Cox-approved and handles 1 Gbps without problems.
Best for: Users who want multiple Ethernet ports for direct wired connections to devices.
View Netgear CM1200 on ModemGuides
6. Motorola MT8733
The Motorola MT8733 is a DOCSIS 3.1 modem and Wi-Fi 6 router combo. It combines a capable gigabit modem with a dual-band wireless router in a single device, which simplifies setup and reduces clutter. The Wi-Fi 6 support handles high-density device environments efficiently. It includes a 2.5 Gbps Ethernet port on the modem side.
Best for: Users who want an all-in-one modem and router combo with the latest wireless technology.
View Motorola MT8733 on ModemGuides
7. ARRIS SURFboard G36
The ARRIS G36 is a DOCSIS 3.1 modem and Wi-Fi 6 router combo. It delivers solid wireless coverage and handles gigabit cable speeds in one unit. It features a 2.5 Gbps Ethernet port and four Gigabit Ethernet ports for wired devices. If you prefer not to manage separate modem and router hardware, this is a strong option.
Best for: Users who want a modem/router combo with Wi-Fi 6 and do not need the newer 6 GHz band.
Standalone Modem vs. Modem/Router Combo
A standalone modem gives you more flexibility. You can pair it with any router you choose, upgrade the router independently, and generally get better Wi-Fi performance from a dedicated router. Most networking experts recommend this approach.
A modem/router combo is simpler. You plug in one device, activate it with Cox, and you are online. The tradeoff is that if either the modem or the router portion fails or becomes outdated, you have to replace the entire unit. Combos also tend to have weaker Wi-Fi range compared to dedicated routers in the same price range.
For the Cox Go Super Fast plan, either option works. If you are comfortable setting up two devices, go with a standalone modem and a separate Wi-Fi 6 or Wi-Fi 6E router. If you want the easiest possible setup, a combo unit will get the job done.
How to Activate Your Own Modem on Cox
Once you have your modem, activating it on the Cox network is a straightforward process.
First, connect a coaxial cable from your wall outlet to the modem. Then connect an Ethernet cable from the modem to your router or directly to your computer. Plug in the modem and wait for all the indicator lights to stabilize, which usually takes two to five minutes.
Next, either visit the Cox activation page at cox.com/activate or call Cox customer support. You will need your Cox account information and the MAC address printed on the modem label. Cox will register the modem on their network, and you should be online within a few minutes.
Frequently Asked Questions
What DOCSIS version do I need for Cox Go Super Fast?
You need a DOCSIS 3.1 modem for the Cox Go Super Fast plan. DOCSIS 3.0 modems do not support the full 1 Gbps speed this plan provides. All of the modems listed in this guide are DOCSIS 3.1.
Can I use my own modem with Cox instead of renting?
Yes. Cox allows customers to use their own modem as long as it is on the Cox approved modem list. Buying your own modem eliminates the monthly rental fee and typically pays for itself within 8 to 12 months.
What is the difference between a 1 Gbps and 2.5 Gbps Ethernet port on a modem?
A standard 1 Gbps Ethernet port caps your wired speed at roughly 940 Mbps. A 2.5 Gbps Ethernet port allows speeds above 1 Gbps to pass through without a bottleneck. For the Cox Go Super Fast plan, a 2.5 Gbps port ensures you are not leaving any speed on the table.
Do I need a separate router with a cable modem?
If you buy a standalone modem, yes, you need a separate router to create a Wi-Fi network and connect multiple devices. If you buy a modem/router combo unit, the router is built in and no additional hardware is needed.
How much does Cox charge to rent a modem?
Cox charges a monthly equipment rental fee that typically ranges from $13 to $15 per month depending on your area. Over two years, that adds up to over $300. Purchasing your own compatible modem is almost always the more cost-effective option.
Will a DOCSIS 3.1 modem work with slower Cox plans too?
Yes. DOCSIS 3.1 modems are backward compatible with all Cox internet plans, including lower speed tiers. If you start with a slower plan and upgrade later, your DOCSIS 3.1 modem will still work without needing to be replaced.
How fast is Cox Go Super Fast compared to other Cox plans?
Cox Go Super Fast offers download speeds up to 1 Gbps for $100 per month. It sits above Cox Go Fast (500 Mbps) and below any multi-gigabit offerings available in select markets. It is the best option for most power users and large households.
