Cat5e vs Cat6 Ethernet: which cable do you need for your network?
By TechCompare · Updated · How we check
Cat5e covers Gigabit and 2.5 Gbps over the full 328 feet (100 meters). Cat6 is the pick when 10 Gbps might matter, on runs up to 180 feet (55 meters).
Both carry Gigabit the full 328 feet (100 meters), but the difference starts at 10 Gbps, where Cat6 reaches 180 feet (55 meters).
Cat5e and Cat6 both carry Gigabit Ethernet (1000BASE-T) the full 328 feet (100 meters), and both handle 2.5 Gbps at that distance too. For a home network running at 1 or 2.5 Gbps, the cable category isn't the limit. The gap opens at 10 Gbps. Of these two, Cat6 is the one listed for it, up to 180 feet (55 meters).
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Side-by-side specs
| Spec | Cat5e | Cat6 |
|---|---|---|
| Max frequencyFrequency is the signal range the cable is tested for. A higher number leaves more room for faster Ethernet. | 100 MHz | 250 MHz (better on this spec) |
| Gigabit (1000BASE-T)The longest cable run the standard allows. | 328 ft (100 m) | 328 ft (100 m) |
| 2.5 Gbps (2.5GBASE-T) | 328 ft (100 m) | 328 ft (100 m) |
| 10 Gbps (10GBASE-T)10GBASE-T is 10 Gbps Ethernet over copper twisted pair, like these two cables. | Not the cable for this job | Up to 180 ft (55 m) (better on this spec) |
| Good for | Gigabit and 2.5 Gbps | Gigabit, 2.5 Gbps and 10 Gbps up to 180 ft (55 m) |
How they differ
Cat6 is specified up to 250 MHz, compared to 100 MHz for Cat 5 and Cat 5e. That extra range doesn't change Gigabit reach. 1000BASE-T runs the full 328 feet (100 meters) on both cables, so the difference shows up at 10 Gbps, not at Gigabit.
The 2.5GBASE-T standard was built to run over existing Cat5e installations, up to 328 feet (100 meters) on Cat5e or better cable. Cat6 and Cat6a work with it too. If your walls already have Cat5e, a 2.5 Gbps upgrade needs new network gear, not new cable.
Cat6 is listed for 10GBASE-T, but only up to 180 feet (55 meters). Cat6a reaches the full 328 feet (100 meters) at 10 Gbps. Cat5e isn't the cable to plan a 10 Gbps link around.
Verdict
Pick Cat6 for new runs that might carry 10 Gbps, as long as they stay within 180 feet (55 meters). Keep Cat5e if Gigabit or 2.5 Gbps is all you need, since it already reaches the full 328 feet (100 meters) at those speeds.
The cable category only changes the answer when 10 Gbps is in the plan. At Gigabit and 2.5 Gbps, the two tie on distance. For a 10 Gbps run longer than 180 feet (55 meters), plan on Cat6a instead.
Which should you pick?
Choose Cat5e
Pick Cat5e for Gigabit Ethernet on runs up to 328 feet (100 meters) and for 2.5 Gbps on existing wiring. It's the right call for any network that won't need 10 Gbps.
See 100 GB over Gigabit EthernetChoose Cat6
Pick Cat6 for new runs that might carry 10 Gbps, up to 180 feet (55 meters). It's also a sensible choice for new Gigabit or 2.5 Gbps wiring if you may want 10 Gbps later, and for any run where you want the higher 250 MHz rating.
Compare Cat6 and Cat6a