Motorola SB6121 Vs SB6120

In this article, we will discuss the comparison between Motorola SB6121 Vs SB6120 to determine which one is better for the money. Both of these two models are cable modems that come from Motorola’s SURF board series. Both of them already have DOCSIS 3.0. However, one of them is older, while the other is newer.

Continue reading to learn more about:
– The design and dimensions of each cable modem
– The available connection options on each cable modem
– The importance of DOCSIS 3.0 in your cable modem
– The hardware of Motorola SB6121 Vs SB6120
– The performance comparison of the two Motorola models
– Which Motorola cable modem that is more recommended

This is the easiest difference between Motorola SB6120 and Motorola SB6121 to spot. They have very different looks. Most people will agree that Motorola SB6121 is the one with a better, more attractive appearance. Not to mention that it is also slimmer and more compact. See also: Netgear CM600 vs CM500.

Motorola SB6120 comes with a boxy shape.The whole housing is plain black, except for the light indicators and their labels on the left side of the unit. Motorola SB6120 looks really plain and unattractive. According to the data sheet, this cable modem measures 5.7 inches x 5.7 inches x 1.5 inches.

On the other hand, Motorola SB6121 is still shaped like a box, but the edges and corners are all rounded. The sides have numerous vent holes. On the front panel, there are several light indicators, along with the brand logo, the product name, and the power button. The lights have different icon shapes, and they have different colors, so you can quickly understand the unit’s status and condition.

Compared to Motorola SB6120, Motorola SB6121 is slightly smaller. According to CNET, it measures 5.2 inches x 5.2 inches x 1.7 inches. As the effect, it should be easy to fit into your room. The addition of a power button is very nice. Turning on and off the modem becomes easier and more convenient.

Connectivity and Setup
In terms of connectivity, Motorola SB6121 Vs SB6120 are identical. These are simple cable modems designed for high-speed residential and commercial uses. You can find the connection ports of a unit on the rear panel.

There are just three ports here. The uppermost port is the 10/100/1000 Base-T Gigabit Ethernet port. This is where you plug the LAN cable to connect it to your computer. With the Gigabit Ethernet port, Motorola SB6120 and Motorola SB6121 are ready to give you incredibly fast and blazing wired network speeds.

Then, there is a standard cable interface. It is a 75-ohm F-connector. This is where you plug the coaxial cable which connects the cable modem to the Internet Service Provider (ISP). Finally, there is the power interface to connect the unit to a power outlet; the unit accepts voltages between 105 and 125 V AC in North America.

Once you have connected all of the necessary cables correctly, you are ready to go. Simply switch on your computer and the cable modem. Depending on the ISP, you may need to login and do some setup before you can start surfing the Internet.

Why You Need DOCSIS 3.0
The major selling point of both Motorola SB6120 and Motorola SB6121 is DOCSIS 3.0. Many Internet service providers have mentioned that using a cable modem that supports DOCSIS 3.0 is very important. So, what is it, exactly? Why is it necessary in the first place?

First of all, DOCSIS is the short for Data Over Cable Service Interface Specification. It is the international standard for high-bandwidth data transfer to cable TVs. It is now used by various cable television operators in order to provide Internet access over their already existing hybrid fiber-coaxial (HFC) network.

The latest version is DOCSIS 3.0. It was released in August 2006. This version is very important because it gives cable Internet providers the ability to provide ultra-fast broadband connections to their users. Of course, if you want to enjoy the best connection speeds, your cable modem needs to support the technology. DOCSIS 3.0 uses channel bonding to allow such impressive performance.

In channel bonding, upstream and downstream data payloads are transferred through multiple individual QAM channels. By bonding multiple channels together, it can increase the available bandwidth. This method effectively raises the data transfer speed.

The next difference between Motorola SB6121 Vs SB6120 is that Motorola SB6120 is an older model. Many people believe that this model still uses older hardware. Hence, it is a possibility that Motorola SB6120 will not be as durable as Motorola SB6121.

Motorola SB6121 is a newer model. It is equipped with newer hardware, even though the firmware is actually the same. Because it comes with newer hardware, the durability and longevity are more likely to last. It will be better supported in the future, too.

Both Motorola SB6120 and Motorola SB6121 are 4×4 cable modems. It means that each of them has 4 downstream channels and 4 upstream channels. The theoretical maximum bandwidths are 152 Mbps for downstream and 108 Mbps for upstream.

In real use, you will not find a real difference in the performance of Motorola SB6120 and Motorola SB6121. They have similar features and performance. The specifications are identical.

They perform very well, and they can give you very good DOCSIS 3.0 performance. Both Motorola SB6120 and Motorola SB6121 can give very high Internet access speeds. You can download huge files in an instant, and you can get incredibly smooth and lag-free gaming experience.

But, then again, the Internet speeds also depend on the ISP as well as your computer. It is quite unlikely that Motorola SB6120 or Motorola SB6121 will cause a bottleneck effect to your Internet access. But if the ISP or your computer is having some problem, you may not be able to enjoy the maximum performance.

Motorola SB6121 Vs SB6120

- DOCSIS 3.0 certified, capable of up to 172 Mbps and upload speeds up to 131 Mbps based on - Cable Internet Service Provider
Supports IPv4 and IPv6 networking, as well as Windows, Mac, and Linux computers
- 10/100/1000Mbps Ethernet port to connect with router or computer
- Requires Cable Internet Service. Compatible with major U.S. Cable Providers
- Designed to provide a cost effective, next generation technology to offer a high speed residential or commercial service tier. Item is Cable MODEM ONLY
- User-friendly online diagnostics and bonded channel status page
- Features a 10/100/1000Base-T Gigabit Port for incredible wired network speeds
- Capable of downloading up to 2000 times faster than 56k analog phone modems

Between these two models, we recommend you to choose Motorola SB6121. This model is newer. It has a better, more attractive design. It also has a power button for easy control. As a newer model, it certainly comes with newer hardware, so the durability and longevity should be better.

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