CAT 6 vs CAT 5e at a Glance
Both CAT 5e and CAT 6 are twisted-pair ethernet cables that handle gigabit networking, but CAT 6 is built to a higher standard for speed headroom and noise resistance. If you are wiring a home or office network and wondering which to pull through the walls, the short answer is that CAT 6 gives you more future-proofing for a small price difference, while CAT 5e remains a solid value for standard internet use.
Speed and Bandwidth
CAT 5e
CAT 5e is rated for 1 Gbps over a full 100-meter run at 100 MHz of bandwidth. That is more than enough for typical broadband, video streaming, video calls, and everyday devices. For most existing homes, CAT 5e already in the walls does the job.
CAT 6
CAT 6 also delivers 1 Gbps to 100 meters, but it raises bandwidth to 250 MHz and supports 10 Gbps over shorter distances, commonly cited up to about 55 meters depending on conditions and interference. The tighter internal construction reduces crosstalk, which matters in dense cable bundles and noisy electrical environments.
Construction Differences
CAT 6 uses thicker conductors and often a internal separator that keeps the twisted pairs apart, which is what gives it better noise rejection. This makes CAT 6 slightly stiffer and a bit larger in diameter than CAT 5e, something to keep in mind for tight conduit fill and sharp bends.
Solid vs Stranded
For permanent in-wall runs, use solid-conductor cable, which holds up in punch-down jacks and keeps signal strong over distance. For short patch cables between a wall jack and a device, stranded cable is more flexible and resists breakage from repeated bending.
Jacket Ratings
Match the jacket rating to where the cable runs. Riser-rated CMR cable is used for vertical runs between floors. Plenum-rated CMP cable is required in air-handling spaces such as drop ceilings used for HVAC return. Using the correct fire rating is a code requirement, not an upgrade.
Which Should You Choose?
For any new installation, CAT 6 is the recommended choice because the cost difference over CAT 5e is small and it protects your wiring against faster equipment for years to come. Choose CAT 5e when you are matching an existing CAT 5e network or want the most economical gigabit cable for a straightforward run.
IB Lighting carries Southwire CAT 5e and CAT 6 data cable in our electrical wire and cable collection, with free freight plus free freight insurance on every order. Call (800) 674-9019 for help choosing the right data cable and jacket rating for your project.