For years, the Arris Surfboard has been the default pick for modems—the one you bought to ditch your ISP’s rental fee and never think about again. And it definitely earned that reputation. The Surfboard lineup, especially the SB8200 and S33, has been rock solid for a lot of people.
However, “rock solid” isn’t quite the same as being the best. Since internet plans have crept up into multi-gig territory in recent years and ISPs have rolled out faster upload tiers, a lot of older Surfboard setups aren’t holding up. So when a buddy texts me asking what to buy now, I’ve stopped saying Surfboard by default. These days, I point them at the Netgear Nighthawk CM3000, and I want to walk you through why.
The Surfboard is great, but it’s no longer keeping up with where internet plans are headed
It’s a fantastic modem that’s slowly being outpaced
Let me be crystal clear before anyone yells at me: the Arris Surfboard is not bad hardware. If you’ve got one humming along and your plan tops out at around a gig, you probably don’t need to touch a thing. I’m not here to tell you to throw out a perfectly good modem.
The problem is what happens when your ISP bumps up its plans, especially on the upload side. A lot of folks running an older Surfboard on something like Xfinity have noticed their upload speeds getting stuck at a frustratingly low ceiling, even though the modem itself seems capable of more. One user who swapped from an Arris S33 to the CM3000 went from being capped at roughly 40 Mbps upload to about 350 Mbps, a nearly nine-fold jump.
That gap isn’t really about Arris being lazy. It’s about a newer technology called mid/high-split that the fastest plans now require, and that’s exactly the lane the CM3000 was built for.
The CM3000 is built for the next generation of upload speeds
Mid/high-split is the boring-sounding feature that actually matters
Your cable connection splits its capacity into separate frequency lanes, some for downloading and some for uploading. For ages, most of that capacity got handed to downloads, because that’s what we all did most of: stream, browse, download.
But the way we use the internet has flipped. Video calls, cloud backups, game streaming, uploading huge files—all of that leans hard on your upload, and that’s where the old split starts to choke. Mid/high-split tech rebalances those lanes to hand more bandwidth to your uploads, and the CM3000 is specifically engineered to take advantage of it on plans like Xfinity’s 2Gbps download and 200Mbps upload tier. We’re talking up to roughly 10x faster uploads for busy, multi-user households.
That’s the headline difference. A lot of older modems simply can’t access those upload tiers, and no amount of restarting or calling your ISP will change that.
The raw specs back up the hype
This thing is a multi-gig monster on paper and in practice
Beyond the upload story, the CM3000 is just a beefy piece of DOCSIS 3.1 hardware. It delivers download speeds up to 2.5Gbps and upload speeds up to 1Gbps, which is genuinely future-proof for where cable plans are heading. It also leans on DOCSIS 3.1 features like Active Queue Management and OFDMA that improve response times and overall performance.
Where it really flexes is the ports. The CM3000 packs a single 2.5Gbps Ethernet port plus two 1Gbps ports. You can plug your router’s multi-gig port straight into that 2.5 Gbps port, or use link aggregation across the two gigabit ports to push higher speeds. If raw wired throughput is what you care about, this modem is engineered to sustain peak performance without overheating or constant resets.
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You actually save money owning one instead of renting
Stop paying your ISP rent every single month
This is the argument I lead with when a friend balks at the price tag, because the CM3000 runs around $299.99 at retail, and that stings up front. I get it. But ditching your ISP’s rental fees can save you hundreds of dollars a year, so the math checks out fast.
If your provider charges you a monthly fee for their box, you’re essentially re-buying that hardware over and over forever. Owning your own modem ends that cycle, and it broadly works with the major cable providers like Xfinity, Spectrum, and Cox. One year in, the CM3000 has basically paid for itself, and everything after that is money back in your pocket.
So is it time to ditch your Surfboard?
Only if your plan has outgrown it
Look, if your Arris Surfboard is happily delivering everything your current plan offers, keep it. There’s no trophy for upgrading hardware you don’t need, and no benefit to spending money for no reason.
But if your uploads feel stuck, the CM3000 is the move
The moment your ISP rolls out a faster upload tier and your old modem can’t reach it, that’s your sign. The CM3000’s mid/high-split support, multi-gig ports, and future-proof 2.5Gbps ceiling are exactly what you need to bolster a network that’s bumping into its limits. Pair it with a good router, kiss your rental fee goodbye, and you’ve got a setup that’s ready for whatever your provider throws at it next. The Surfboard had a great run, but for where things are headed now, the CM3000 is the one I’m recommending.
Stephan is the sports journalist for the Maple Grove Report.
