Cat6 vs Cat6a vs Cat8: Which Ethernet Cable Do You Need?

For most home equipment connections, choose the Cable Matters Snagless Cat6 patch cable, model 160001; choose Cat6A when specifying a new installation for 10GBASE-T over a full 100 m channel. Cat8 serves a different job: 25/40GBASE-T over short channels up to 30 m, particularly switch-to-server links in data centers. Those distance distinctions, rather than the largest category number, drive our recommendations. (Fluke's installation guidance, category overview)

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Quick picks

Construction and application details come from the 160001, 160012, 160017 and 160037 manufacturer pages. Pick the job first, then the length and installation rating.

Cat6 vs Cat6A vs Cat8: speed and distance

These are cabling applications, not promised download speeds. Your ports and the rest of the network still limit the connection, as TP-Link explains.

Sources: IEEE's 2.5/5G objectives and 25/40GBASE-T objectives, plus Fluke's TSB-155 explanation and category overview. The IEEE objectives also include 5G over Cat5e under defined configurations; the table isn't a reason to discard working Cat5e.

A source discrepancy: Fluke's overview gives 35 meters for Cat6 at 10G; its more detailed TSB-155 explanation gives 37 meters and the conditional 37–55 meters range. We use the detailed guidance for evaluating existing wiring, with testing, rather than promise that every short Cat6 installation will work.

For the conventional Cat6/Cat6A structured channel, budget up to 90 meters of fixed cabling plus 10 meters of patch cords, totaling 100 m. The patch leads count toward that total, not extra distance beyond the wall cable. (Fluke's channel explanation)

Best everyday patch lead: Cable Matters 160001 Cat6

The maker specifies 24 AWG bare copper, unshielded construction, RJ45 connectors and snagless strain-relief boots. It lists support for PoE, PoE+ and PoE++, and describes the cable as intended for indoor use. That's the straightforward equipment lead we would choose for a home office, console or router connection. (Product specifications)

Its advertised support for 10GBASE-T doesn't cancel the Cat6 channel limits above. Buy enough length for the actual route, and move to Cat6A when the installation calls for a full-length 10G channel. Do not extend the indoor-use claim to an outdoor or direct-burial run.

See the Cat6 patch cable at Cable Matters

Best shielded patch lead: Cable Matters 160012 Cat6A

This model has 26 AWG bare-copper conductors, S/FTP shielding and shielded RJ45 connectors. Cable Matters specifies 10-Gigabit Ethernet and backward compatibility with Gigabit and Fast Ethernet. Choose it when your equipment connection calls for shielded Cat6A. (Product specifications)

Shielding needs a properly connected path: Fluke warns that an incorrectly connected shield can fail alien-crosstalk testing. Follow the hardware maker's termination instructions when building a shielded installation. (Fluke's installation note)

Check pack quantity before ordering: the product page's title says five-pack, while its main product heading omits that quantity. We recommend the model, without assuming a particular pack or length.

See the shielded Cat6A patch cable at Cable Matters

Best for fixed Cat6 wiring: Cable Matters 160017 CMR

For a fixed Cat6 installation, this spool supplies 23 AWG solid bare copper, unshielded construction and a CMR riser jacket. Cable Matters identifies between-floor in-wall applications and explicitly excludes plenum spaces and outdoor use. It also lists PoE, PoE+ and PoE++ support. (Product specifications)

Treat it as an installation project: plan compatible terminations and confirm the jacket suits the route. Its Cat6 category retains the same conditional 10G limits as other Cat6 cabling. We would choose the Cat6A spool below if full-channel 10G is the design requirement.

See the Cat6 CMR bulk cable at Cable Matters

Best for new 10G wiring: Cable Matters 160037 Cat6A CMR

Our choice for a new 10G installation is this 23 AWG solid-copper Cat6A spool. It is unshielded U/UTP and CMR riser rated. Cat6A needn't be shielded: Cable Matters even explains that this model's foil-looking internal wrap is an isolation layer, not an EMI shield. (Product specifications)

The practical catch is connector fit. Its conductor insulation reaches 1.2 mm, and the maker warns that standard RJ45 modular plugs won't fit; it recommends compatible Cat6A keystone jacks or patch panels. Add those terminations and wall plates to the shopping list before buying the spool. Do not choose a plug merely because its package also says Cat6A.

See the Cat6A CMR bulk cable at Cable Matters

How we choose

This is a specification-based comparison, without physical testing or speed measurements by thisPING. We compared the manufacturer's construction, compatibility and installation notes with IEEE project objectives and Fluke Networks' cabling guidance. The recommendations distinguish equipment leads from fixed wiring, and preserve qualifications where distance depends on the installed channel. We identify conflicting wording instead of turning it into a guarantee. More about our research approach: How we choose.

Buying guide: choose the cable for the whole connection

Start with ports and the route

Check the Ethernet port on the computer or adapter, the switch and the router. A higher-category cable cannot make a gigabit port support multi-gig speed; internet performance also depends on the ISP connection. TP-Link separates wired link speed from internet speed and identifies the slowest part of the path as the limiting factor. (TP-Link FAQ) Our multi-gig switch guide helps with the port audit.

Measure the intended cable route and include equipment leads in the channel total. Decide whether you need an accessible patch connection or fixed in-wall wiring, then match category, jacket and connector fit to that job.

1. 1

   Check the ports

   Establish what both ends of the connection support.

2. 2

   Measure the route

   Count the fixed run and the equipment leads together.

3. 3

   Choose the installation parts

   Match the cable jacket and conductor size to the route and terminations.

Copper, CCA and questionable Cat8 claims

Look for an explicit bare-copper conductor specification. Copper-clad aluminum, or CCA, is not the same construction. Fluke describes increased resistance, more heat and lower voltage at the powered device as concerns with CCA. (Fluke's CCA guidance)

For suspect bulk cable, Fluke describes scraping a cut conductor to expose a silver-colored aluminum core; it also warns that box weight can be manipulated. Start with the exact maker model and conductor declaration, rather than trusting weight or a jacket legend alone.

An unshielded Cat8 claim needs scrutiny. Cable Matters' cable-types article mentions unshielded Cat8 options, whereas Fluke's shield guidance says all Category 8 cables are shielded. We follow the latter guidance: ask for construction documentation and category compliance evidence before accepting such a claim. A printed category is not a certification result.

Patch leads, flat cables and installation ratings

Fluke recommends solid conductors for horizontal fixed runs and explains why flexible stranded construction suits frequently moved equipment leads. Solid copper and stranded copper describe different constructions; neither term means CCA. (Solid versus stranded)

Flat leads can help with low-profile routing; Cable Matters describes flat options among its cable types. Our advice is to keep a flat lead accessible unless its maker documents suitability for the proposed installation. Check its category, conductor material, PoE support and jacket independently. Shape alone gives no reason to assume the CMR suitability documented for the bulk pick above.

For a new wired mesh installation, follow the same selection process; see our mesh Wi-Fi guide for the equipment choice.

Ask for the right test

Fluke distinguishes verification of basic wiring, qualification for a particular network application, and certification against cabling standards. A simple continuity or wiremap pass cannot establish Cat6A or Cat8 compliance. For installed Cat6 intended for 10G, request application qualification including the alien-crosstalk checks described above. (Testing levels)

• Yes: Verification checks basic connectivity
• Yes: Qualification assesses a network application
• Yes: Certification assesses cabling-standard compliance
• No: A wiremap pass alone proves the printed category

Verdict

Choose 160001 Cat6 for an ordinary indoor equipment lead, 160012 Cat6A for a shielded patch connection, and 160017 CMR for fixed Cat6 wiring. For a new installation intended for full-channel 10G, choose 160037 Cat6A CMR with compatible terminations. Cat8 belongs on the shortlist when you have an actual short 25/40GBASE-T application; its label alone supplies no benefit to slower ports.