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Freedom251 › Blog › 4K TV

Cat 8 Isn’t an HDMI Cable: What Home Network Shoppers Actually Need

By Freedom251 Team · · 4 min read

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Cat 8 and HDMI are different cable families. Cat 8 is shielded Ethernet cabling with RJ45 connectors for network traffic and Power over Ethernet. HDMI cables connect video and audio devices. Gold-plated contacts may be used on either type, but plating is a small connector-construction detail—not a speed grade, HDMI version or proof of certification.

Why the comparison is misleading

The phrase “gold-plated HDMI cable” often signals a premium-sounding upgrade, while Cat 8 is a defined Ethernet category. They solve different connection problems:

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Attribute Cat 8 Ethernet HDMI cable
Family Twisted-pair network cable Audio/video interface cable
Connector RJ45, usually with shielded plugs HDMI connector in the size and type required by the devices
Primary use Switches, routers, computers, access points, servers and PoE equipment TVs, monitors, game consoles, receivers, streaming boxes and PCs
Performance label Category rating, bandwidth and supported Ethernet speeds Official HDMI cable name, bandwidth rating and certification label
Gold plating Contact-material detail Contact-material detail

An RJ45 plug cannot be inserted into an HDMI port, and an HDMI cable cannot replace an Ethernet patch lead simply because both may have gold-colored contacts.

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What Cat 8 actually provides

The StarTech Cat 8 datasheet specifies operation at 10, 25 and 40Gbps, 2000MHz bandwidth, shielding and Power over Ethernet Plus Plus (PoE++) support up to 100W. Those figures describe the cable category and its tested construction, not the speed of an ordinary home internet subscription.

#1 Best Overall
UGREEN Cat 8 Ethernet Cable 15FT, High Speed Braided 40Gbps 2000Mhz Network Cord Cat8 RJ45 Shielded Indoor Heavy Duty LAN Cables Compatible with Gaming PC PS5 PS4 PS3 Xbox Modem Router 15FT
  • 40 Gbps 2000 Mhz High Speed: The Cat 8 ethernet cable support max. 40 Gbps data transfer and 2000 MHz Brandwith, ideal for gaming and streaming, greatly improving upload and download speed, sound, image and resolution quality
  • Excellent Anti-interference: The ethernet cable comes with 4 shielded foiled twisted pairs (F/FTP), pure copper core and gold-plated RJ45 connector, reducing interference, noise and crosstalk, making network speed faster and more stable
  • Marvelous Durability: Internet cable wrapped with quality cotton braided cord, which makes the LAN cable stronger and more durable. The test proves that this internet cable can be bent at least 10000 times without broken, very suitable for long-term use
  • PoE Supported: All lengths of ethernet cord can support the PoE power supply function except 65ft. You don't need additional power supply when installing a PoE camera, which is very convenient and safe
  • Wide Compatibility: With the RJ45 Connector, network cable can be perfectly compatible with computers, laptops, modems, routers, PS5, X-Box and other networking devices. It can also be fully backward compatible with Cat7, Cat6e, Cat6, Cat5e, Cat5

When those specifications matter

  • 40Gbps links: Useful only when both network devices, their ports and the installation support that rate.
  • 2000MHz bandwidth: A cable-performance specification; it does not make a slower router or switch operate at 2000MHz.
  • PoE++ up to 100W: The stated maximum for compatible power-sourcing and powered devices. The actual delivered power depends on the equipment, cabling length and installation conditions.
  • Shielding: Helps control interference when the entire link—including compatible connectors and proper grounding—is installed appropriately.

For a typical home with gigabit internet and standard gigabit switches, Cat 8 can be more capability than the network requires. It may still be selected for a demanding local network, a new high-speed backbone or a future-ready cable run, but the connected hardware remains the limiting factor.

HDMI cable names and certification

HDMI Licensing Administrator (HDMI LA) separates HDMI cable classes from Ethernet categories. Its current cable names include Standard HDMI, Premium High Speed HDMI, Ultra High Speed HDMI and Ultra96 HDMI.

Rank #2
Sale
UGREEN Cat 8 Ethernet Cable 6FT, High Speed Braided 40Gbps 2000Mhz Network Cord Cat8 RJ45 Shielded Indoor Heavy Duty LAN Cables Compatible with Gaming PC PS5 PS4 PS3 Xbox Modem Router 6FT
  • 40 Gbps 2000 Mhz High Speed: The Cat 8 ethernet cable support max. 40 Gbps data transfer and 2000 MHz Brandwith, ideal for gaming and streaming, greatly improving upload and download speed, sound, image and resolution quality
  • Excellent Anti-interference: The ethernet cable comes with 4 shielded foiled twisted pairs (F/FTP), pure copper core and gold-plated RJ45 connector, reducing interference, noise and crosstalk, making network speed faster and more stable
  • Marvelous Durability: Internet cable wrapped with quality cotton braided cord, which makes the LAN cable stronger and more durable. The test proves that this internet cable can be bent at least 10000 times without broken, very suitable for long-term use
  • PoE Supported: All lengths of ethernet cord can support the PoE power supply function except 65ft. You don't need additional power supply when installing a PoE camera, which is very convenient and safe
  • Wide Compatibility: With the RJ45 Connector, network cable can be perfectly compatible with computers, laptops, modems, routers, PS5, X-Box and other networking devices. It can also be fully backward compatible with Cat7, Cat6e, Cat6, Cat5e, Cat5
HDMI cable name Published capability in the cited program information Shopping signal
Standard HDMI Baseline HDMI performance; versions and device requirements determine what is possible Official cable name
Premium High Speed HDMI Tested for full 18Gbps bandwidth Authentication label
Ultra High Speed HDMI Up to 48Gbps under the cited specifications Official certification label and QR verification
Ultra96 HDMI Up to 96Gbps under the cited specifications Official certification label and QR verification

HDMI LA cautions that resellers may use varied marketing language instead of the official cable names. Look for the relevant certification label and, where provided, scan the QR code to verify it. A listing that emphasizes “gold-plated,” “8K-ready” or a version number without an official cable designation gives you less useful evidence.

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Choosing the right cable for common home setups

4K TV, console or streaming box

  1. Check the highest resolution, refresh rate, HDR format and eARC features your devices must use.
  2. Choose the HDMI cable class whose certified bandwidth covers that requirement.
  3. Verify the official HDMI certification label, especially for high-bandwidth links.
  4. Use the connector type and length that fit the equipment and installation; gold plating is optional construction detail, not the selection criterion.

Router, switch, desktop or access point

  1. Identify the fastest Ethernet port on each device.
  2. Buy an Ethernet cable with the appropriate RJ45 category and shielding for the environment.
  3. For a Cat 8 purchase, the relevant description is “Cat 8 Ethernet cable, RJ45,” with the claimed 10/25/40Gbps and 2000MHz specifications stated by the manufacturer.
  4. If the link carries power, confirm that both the power-sourcing and powered devices support the required PoE++ level; a cable’s “up to 100W” statement alone does not upgrade incompatible hardware.

TV connected to a router

You may need both cables: HDMI from the streaming box or console to the TV, and Ethernet from the box, TV or nearby switch to the network. HDMI carries audio and video; it does not become a general-purpose replacement for an RJ45 network cable.

Rank #3
DbillionDa Cat 8 Ethernet Cable, 6FT 40Gbps 2000MHz RJ45 LAN Cable | 3FT 6FT 10FT 15FT 20FT 25FT 30FT 35FT 40FT 50FT 60FT 65FT 100FT 150FT Internet Cable for Router, Modem, Switch, PS5, Xbox
  • Designed for Outdoor & Direct Burial Installations – Heavy-duty double-shielded Cat8 Ethernet cable minimizes EMI/RFI interference and delivers stable long-distance performance. Waterproof, anti-corrosion PVC jacket allows safe direct burial and reliable use in outdoor or indoor environments.
  • 26AWG for Stable High-Load Networks – Thicker 26AWG conductors provide faster, more stable data transmission than standard 32AWG cables. Ideal for high-performance home networks, gaming setups, smart homes, and data-intensive applications.
  • F/FTP Shielding & Hyper-Speed Performance: Cat8 Ethernet cable constructed with 4 shielded foiled twisted pairs and 26AWG OFC conductors; supports bandwidth up to 2000 MHz and data transmission speeds up to 40 Gbps, effectively reducing signal interference and ensuring stable connections. Ideal for low-latency gaming, 4K/8K streaming, and high-speed internet connections.
  • RJ45 Connectors & Wide Compatibility: Cat8 Ethernet cable with two shielded RJ45 connectors; compatible with networking switches, IP cameras, routers, Nintendo Switch, modems, PS3, PS4, Xbox, patch panels, servers, smart TVs, and more; works with Cat7, Cat6, Cat5e, and Cat5 devices
  • Weatherproof & UV Resistant: Outdoor-rated Cat8 Ethernet cable with UV-resistant PVC jacket; withstands direct sunlight, extreme cold, humidity, and hot weather; anti-aging and durable; Includes 18-month support.

Does HDMI with Ethernet replace network cabling?

Some HDMI products are named “Standard HDMI Cable with Ethernet.” HDMI LA describes this as a cable with the same baseline performance as Standard HDMI Cable plus a dedicated HDMI Ethernet Channel for device networking. That channel is part of the HDMI link and requires compatible equipment; it is not the same thing as running a Cat 8 (or other Ethernet-category) cable from a device to a router or switch. In many current setups, the HDMI Ethernet feature is not the networking method used by the equipment, so check the device manuals before relying on it.

Do gold-plated contacts make internet or video faster?

No. Plating can be used to help resist corrosion and maintain a reliable contact surface, but it does not change an Ethernet category, increase an HDMI link’s certified bandwidth or compensate for poor cable construction. Speed is determined by the cable’s certified class, the connectors, length and installation, plus the capabilities of every connected device.

Rank #4
Orbram Cat 8 Ethernet Cable 50FT, High Speed Braided 40Gbps 2000MHz Network
  • 🔌【Higher Speed】Cat 8 Shielded Ethernet Cable provides performance of up to 40000 Mbps (or to 40 Gigabit per second); High bandwidth of up to 2000 MHz, high-speed data transfer for server applications, cloud storage, online HD video streaming, and gaming without any lag or stop. With Orbram Cat8 ultra-fast patch cord, you won't worry about waste time for waiting.
  • 🔌【Anti-Interference Design】Orbram professional network cables are made of 4 shielded foiled twisted pair(S/FTP) copper wires with 24K gold-plated RJ45 connectors on each end. Compared to the Cat 7 network Ethernet cable, the additional shielding and improved quality in twisting of the wires provides better protection from crosstalk, noise, and interference that can degrade the signal quality. This will increase the reliability and accuracy of the data transfer.
  • 🔌【More Convenient】Cat 8 rj45 cables are in flat design to avoid tangled cords and save space. Flat Lan cable is super flexible to make it easier to hide or run along any surface. You can easily and immediately install the cable run along walls, follow edges or corners when you receive the durable gigabit ethernet cable.
  • 🔌【More Applications】 50ft flat Cat 8 Computer Cables are widely compatible with Cat5, Cat5e, Cat6, and Cat6A Ethernet cables. Provides universal connectivity for Televisions, Xbox One, Xbox 360, Switches, Routers Modems, PS3, PS4, Computer, Laptop, Printers, Network Printers, Network Attached Storage Device and other networking equipment.
  • 🔌【Incredible Durable】 Double braided nylon exterior make Cat8 Ethernet Cable more durable, flexible and tangle-free. And this sturdy cat 8 patch cord can be bended at least 10 thousands times, so that you can reuse it without any concerns.
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Is Cat 8 worth it for home networking?

Choose Cat 8 when you have a concrete need for its rated performance—such as compatible 25/40Gbps equipment, a high-capacity local backbone or a PoE++ installation designed around that specification. For ordinary gigabit home networking, a lower category that meets the port requirements is often sufficient. Do not buy Cat 8 as an HDMI substitute, and do not treat a gold-plated plug as evidence that a cable is Cat 8 or HDMI-certified.

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Frequently Asked Questions

Is Cat 8 the same as HDMI?

No. Cat 8 is shielded RJ45 Ethernet cabling for network data and PoE; HDMI is an audio/video connection with separate cable names and certification programs.

Best Value
Sale
Smolink Cat 8 Ethernet Cable, 50ft 40Gbps 2000MHz RJ45 LAN Cable | Nylon Braided High Speed Internet Cable, Heavy Duty Shielded UFTP Cable for Router Modem Gaming PC PS5 Xbox
  • Cat 8 Speed, Cat 5/5e Value Enjoy Cat 8 Ethernet cable performance at a Cat 5/5e-level value. With up to 40Gbps speed and 2000MHz bandwidth, this high speed internet cable delivers more bandwidth than standard Cat 5 and Cat 5e cables, helping support smooth gaming, streaming, video calls, large file transfers and everyday wired network use.
  • 40Gbps Speed, Wide Compatibility This Cat 8 Ethernet cable supports up to 40Gbps data transfer and 2000MHz bandwidth for fast, reliable internet performance. Standard RJ45 connectors are backward compatible with Cat7, Cat6, Cat6a and Cat5e devices, including routers, modems, switches, gaming PCs, PS5, PS4, Xbox, smart TVs, laptops and printers.
  • Stable U/FTP Shielding Each of the 4 twisted pairs is individually wrapped with aluminum foil to help reduce crosstalk, noise, and signal interference. Combined with RJ45 connectors on both ends, the U/FTP design helps maintain cleaner signal transmission for a stable and reliable wired network connection.
  • Nylon Braided Durability The nylon braided jacket adds everyday durability while keeping the cable flexible and easy to route. Reinforced construction helps the cord handle bending, pulling and frequent plugging, making it a reliable choice for desks, gaming rooms, home offices and long-term network setups.
  • 50ft Reach for More Setups The 50 ft length makes it easier to connect devices across rooms, along walls, under desks or around corners. Great for router-to-PC connections, modem-to-TV setups, gaming consoles, workstations, printers and other home network equipment that needs a longer Ethernet cable.

What cable do I need for a 4K TV and router?

Use a certified HDMI cable between the TV and its video source, and an RJ45 Ethernet cable between the TV, streaming device or switch and the router when wired networking is required.

Can a gold-plated cable improve my internet speed?

No. Gold plating is a contact-material feature. Network speed depends on the Ethernet category, connected hardware and installation.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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4K TVCable buying guideCat 8Ethernet cablesHDMIhome networking

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