
Netgear CM1000 Black
Score: 80/100
ZyXEL C3510XZ
Score: 78/100Rankings

The Netgear CM1000 is a DOCSIS 3.1 cable modem delivering up to 1.2 Gbps download speeds and broad compatibility with major US cable providers. Its single 1 Gbps Ethernet port and lack of link-aggregation limit scalability for multi-gigabit plans. Ideal for households on 500 Mbps-1 Gbps cable plans needing a reliable, future-proof modem.

The Zyxel C3510XZ is a fiber-only Wi-Fi 6 gateway offering high wireless capacity and four Gigabit LAN ports. Its limitations include lack of DSL/cable support, no multi-gigabit Ethernet, and minimal USB capability. Best suited for CenturyLink or other fiber subscribers needing an all-in-one solution.
| Attribute | ![]() | ![]() |
|---|---|---|
1,200 Mbpsbest | 940 Mbps | |
304 Mbpsbest | — | |
1 ports | 4 portsbest | |
— | 1 portsbest | |
| ↓ lower better | — | 27 Wbest |
| ↓ lower better | — | 0.99 kgbest |
0.25 yearsbest | — |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Performance(1) | ||
Maximum Download Speed (Mbps) | 1200 Mbps | 940 Mbps |
Ports(1) | ||
Ethernet Ports (count) (ports) | 1 ports | 4 ports |
Build & Design(2) | ||
Dimensions (HxWxD) (mm) | 8.8x5.9x5.4 inches mm | 245x175x60 mm mm |
Form Factor | cable_modem | gateway |
General(1) | ||
Provider Compatibility | Xfinity, Comcast, Cox, Spectrum, Mediacom | CenturyLink |


Products in the top-left offer the best value (high score, low price).

Professional reviewers consider the CM1000 a reliable, future-proof DOCSIS 3.1 modem that delivers solid performance on 1 Gbps cable plans. They commend its straightforward setup, broad ISP compatibility, and elegant design, while noting its single-gigabit Ethernet port and lack of dual ports as drawbacks compared to higher-end competitors.
Everyday users praise the CM1000 for its plug-and-play simplicity, consistent gigabit-class speeds, and long-term stability, often rating it above 4.5 out of 5. Common themes include appreciation for easy ISP activation and noticeable speed improvements, balanced by complaints about its bulkier size and occasional provider-specific activation issues.

Professional reviews are absent from the available sources; vendor and reseller descriptions emphasize the gateway's Wi-Fi 6 performance, integrated design, and suitability for high-device households, while noting that technician installation is required for activation.
User feedback is minimal, with listings showing few or no reviews; the limited comments focus on the product's specifications rather than experiential praise or complaints.