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Ethernet cable speed categories explained

David Anders

Feb 12, 2020 — 5 min read

Does the type of Ethernet cable you use make a difference? It can. Uncover which one is best for your internet connection.

At a glance, Ethernet cables appears to be little more than bulky phone cords. They are vastly different, however, and the type of Ethernet cable you use can have an impact on your internet connection and speeds.

Ethernet cables come in different categories, each identified as “Cat” followed by a number. The most common Ethernet types are:

  • Cat 5
  • Cat 5e
  • Cat 6
  • Cat 6a
  • Cat 7
  • Cat 7a
  • Cat 8

Understanding the capabilities of each cable category is important when choosing the right one for your home. Learn more about Ethernet cable categories to identify the best one to set up your internet service.

Ethernet cable category quick comparison

Cat 5 – outdated and hard to find

Before internet plans with speeds of 100 Mbps and higher were so common, Cat 5 cables were sufficient for nearly every home network. However, as the availability of faster internet continues to rise, Cat 5 cables have become as obsolete as non-HD TVs. Therefore, even if your internet plan doesn’t offer speeds up to 100 Mbps, a Cat 5 cable will likely not be your best option simply because they are hard to find new.

  • Average price for 12 ft cable: N/A
  • Go with Cat 5 if: You already own a Cat 5 cable and your internet plan is lower than 100 Mbps.
  • Upgrade to Cat 5e if: You need a new cable. A new Cat 5e will be much easier to find than a Cat 5 cable and will support faster speeds if you decide to upgrade your internet plan in the future.

Cat 5e – the current standard

Low-cost and capable of supporting gig internet, Cat 5e (Cat 5 “enhanced”) replaced Cat 5 as the Ethernet standard. Cat 5e supports up to 1,000 Mbps and is built to reduce crosstalk — unwanted transfer of signal between the cables — for a more consistent connection. This is the most common type of Ethernet cable because it supports speeds up to 1 Gbps and typically costs less than Cat 6 or Cat 7 cables.

  • Estimated price for 12-ft. cable: Less than $10
  • Go with Cat 5e if: You want an affordable cable that will do the job.
  • Upgrade to a Cat 6 if: You want higher bandwidth and the option of a “shielded” cable, which reduces crosstalk and signal interference.

Cat 6 – higher bandwidth, possibly shielded

Standard Cat 6 cables support the same speeds as Cat 5e but give you more than double the bandwidth. The higher bandwidth helps reduce download and upload times, especially if you are transferring files from one computer to another via a Cat 6 cable.

Another potential benefit of Cat 6 cables is shielding. This is a thin protective barrier around the wires inside the Ethernet cable which further protects them from crosstalk and interference. Not all Cat 6 cables come with this feature, however, so look for “STP” or “shielded twisted pair” when shopping for Cat 6 cables.

  • Estimated price for 12-ft. cable: $10-$15
  • Go with a Cat 6 if: Your internet plan speeds are 1,000 Mbps or less and you want higher bandwidth for faster downloads and uploads.
  • Upgrade to Cat 6a if: You have an internet plan with speeds above 1,000 Mbps or anticipate getting a faster plan in the future.

Cat 6a – 10x the speeds, double the bandwidth

Cat 6a (Cat 6 “augmented”) gives you a big jump in both speeds and bandwidth over the Cat 5e and Cat 6, supporting up to 10,000 Mbps and 500 MHz. Plus, all Cat 6a and higher cables feature a shielding designed to eliminate crosstalk almost entirely

Though probably more than the average user needs, Cat 6a cables will deliver a fast, reliable connection. It’s also safe to say this cable will support your high-speed internet connection for years to come, even as faster cable and fiber-optic internet speeds become available.

  • Estimated price for 12-ft. cable: $15-$20
  • Go with Cat 6a if: Your internet plan speeds are higher than 1,000 Mbps. You want a cable that likely won’t be outdated in two to three years.
  • Upgrade to Cat 7 if: You want a cable that supports slightly higher bandwidth and will cost you around the same price as a Cat 6a cable.

Cat 7 – a little higher bandwidth than Cat 6a

Cat 7 cables are the latest generation of Ethernet cords available but have little to offer compared to Cat 6a aside from slightly higher bandwidth. Both support speeds up to 10,000 Mbps, but the Cat 7 supports 600 MHz of bandwidth compared to the 500 MHz of Cat 6a. The higher bandwidth frequency does allow for faster data transfers, so if you plan on downloading or uploading large files, the extra bandwidth the Cat 7 gives you may be worth it.

  • Estimated price for 12-ft. cable: $15-$25
  • Go with Cat 7 if: Your internet plan speeds are higher than 1,000 Mbps and want a cable that supports high bandwidth.
  • Upgrade to Cat 7a if: You want a cable that supports the highest bandwidth available.

Cat 7a – even more bandwidth

Cat 8, the next generation of Ethernet cables, is on the horizon but for the time being, Cat 7a (Cat 7 “augmented”) is the highest-performing Ethernet cord available. Like the Cat 6a and Cat 7 cables, the Cat 7a supports speeds up to 10,000 Mbps, but the max bandwidth is much higher at 1,000 MHz. Again, this cable is probably much more than the average user needs, but it’s ideal for those who want the best cable now and a great one for future internet services.

  • Estimated price for 12-ft. cable: $25-$35
  • Why choose Cat 7a: You want the top-of-the-line connection and don’t mind paying a little more for it.

Tips for choosing the right Ethernet cable

Along with identifying the right Ethernet cable type for your internet service, there are a few other factors you may want to think about when shopping for the right one for your needs.

  • Consider the length – Ethernet cables come in many lengths, ranging from three to 300 feet or more. Think about the proximity of your router and the devices you want to connect in order to get a cord with sufficient length. Keep in mind that running the cord along baseboards or through the walls will take up more length.
  • Choose pure copper cables – Ethernet cord manufacturers use either pure copper or copper-clad aluminum. Pure copper will give you a better connection, so look for “pure copper wire” or “TIA 568-C22” on the packaging. The copper-clad aluminum, identified as “CCA,” might be a little cheaper, but it won’t give you the same quality connection.
  • Ask what your installer is giving you – Often, your internet installer will come with an Ethernet cord to hook your modem up to your router. Ask what kind of cable the installer is using, and request one of better quality if it’s not the best one for your connection.

For more tips about maximizing your internet connection, check out our Resource Center. And to shop high-speed internet plans in your area, click the button below.

David Anders

Written by:

David Anders

Senior Writer, Broadband Content

David joined the Allconnect team in 2017, specializing in broadband and TV content. His work has been referenced by a variety of sources, including ArcGIS, DIRECTV and more. As a Senior Writer, David is motivate… Read more

Trey Paul

Edited by:

Trey Paul

Editor, Broadband Content

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