Ignore the erroneous answer that Cat 8 is a marketing gimmick. As noted by someone else, Cat 8 is rated for 40Gbps/2000Mhz which most people, especially home users, cannot utilize at this time. If you want to future proof your wiring, get Cat 8 but at the speeds you mention, a decent shielded Cat 5e or Cat 6 or 6a will work just fine. You'll see no speed boost just from a "faster" cable. Avoid Cat 7 and 7A due to finicky proprietary connector issues.

Does this have to plug into the router or can it plug into a Wifi extender?

If your wifi extender is set to allow connections to your main access point via the Ethernet port, then yes. It will work just like any other Ethernet cable. If you have tried a different cable and it did not work, your extender is either not setup properly to allow this or it is not capable of it.

will this cable make a difference if I'm already hitting max speeds with my cat6? my interenet speed plan is 400mpbs

Cat6 or Cat6a is all you need. Any latency you feel is either the port or you provider. CAT8 is bs, save your money.

Does this cable have any markings on the cable itself that identify it as category 8?

Other than Cat8 written in white on the actual cable. There are no other markings on it.

Dbillionda Cat 8 Ethernet Cable 40gbps 2000mhz 25ft Supports Cat7

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

⚡ Connect Faster, Game Harder, Stay Unstoppable!

BUILT FOR ANY ENVIRONMENT - Heavy-duty PVC jacket is waterproof, UV-resistant, and direct burial rated—perfect for indoor or outdoor use.
GOLD PLATED RJ 45 CONNECTORS - Premium corrosion-resistant connectors deliver reliable, high-quality connections every time.
ROCK SOLID SIGNAL INTEGRITY - Quadruple shielding and 26AWG thick OFC conductors ensure your connection stays stable and interference-free.
BLAZING 40 GBPS DATA TRANSFER - Experience ultra-fast, lag-free streaming and gaming with Cat8 speeds that crush the competition.
VERSATILE DEVICE COMPATIBILITY - Seamlessly connects with Cat5 to Cat8 devices—from gaming consoles to smart home hubs—future-proof your setup.

The DbillionDa Cat 8 Ethernet Cable delivers ultra-high-speed data transfer up to 40Gbps with a 2000MHz bandwidth, featuring quadruple shielding and 26AWG OFC conductors for superior signal stability. Its gold-plated RJ45 connectors ensure corrosion resistance and wide compatibility with Cat5 through Cat8 devices. Designed for both indoor and outdoor use, this cable boasts a weatherproof, UV-resistant PVC jacket and direct burial capability, making it the ultimate choice for gamers, professionals, and smart home enthusiasts seeking reliable, lightning-fast network performance.

Specifications

ASIN	B07QLD7Y7B
Best Sellers Rank	#2 in Cat 7 Ethernet Cables
Brand	DbillionDa
Brand Name	DbillionDa
Cable Type	Ethernet
Color	Black
Compatible Amazon Tablet Models	Amazon Fire HD 10 11th Generation, Amazon Fire HD 10 13th Generation, Amazon Fire HD 10 5th Generation, Amazon Fire HD 10 7th Generation, Amazon Fire HD 10 9th Generation, Amazon Fire HD 10 Kids 11th Generation, Amazon Fire HD 10 Kids 13th Generation, Amazon Fire HD 10 Kids 7th Generation, Amazon Fire HD 10 Kids 9th Generation, Amazon Fire HD 10 Kids Pro 11th Generation, Amazon Fire HD 10 Kids Pro…
Compatible Devices	Any device with an RJ45 port, including Monitor, Patch Panels, Switches, Laptop, Scanner, Tablet, Notebooks, PCs, Network Cards, Macs, PoE Devices, Routers, Modems, Printer Smart Watch, Splitters, PS3, PS4, PS5, Server, Projector, DVD Player Compatible Devices Any device with an RJ45 port, including Monitor, Patch Panels, Switches, Laptop, Scanner, Tablet, Notebooks, PCs, Network Cards, Macs, PoE Devices, Routers, Modems, Printer Smart Watch, Splitters, PS3, PS4, PS5, Server, Projector, DVD Player See more
Compatible Phone Models	VoIP phones
Connectivity Technology	Ethernet
Connector Gender	Male-to-Male
Connector Type	RJ45
Customer Package Type	FFP
Customer Reviews	4.7 out of 5 stars 70,000 Reviews
Data Transfer Rate	40 Gigabits Per Second
Ethernet Cable Category	Cat 7
Frequency	2000 MHz
Gauge	26
Indoor Outdoor Usage	Indoor, Outdoor
Item Length	25 Feet
Item Shape	Round
Item Weight	7.76 Ounces
Manufacturer	DbillionDa
Model	cat8 25ft ethernet cable
Number of Items	1
Number of Pins	8
Other Special Features of the Product	Heat Resistant/ High Speed/ UV Resistant/ Water Resistant/ Waterproof/ Weatherproof
Outer Material	Polyvinyl Chloride (PVC)
Part Number	NETWORK CABLE
Recommended Uses For Product	Any device with an RJ45 port, including Routers, Monitor, Modems, Printer, Smart Watch, PS3, PS4, PS5, Server, Projector, DVD Player, Patch Panels, Switches, Laptop, Scanner, Tablet, Notebooks, PCs, Network Cards, Macs, PoE Devices, Xbox Series X, Xbox Series S, Xbox One, VR, PlayStation Other Video Game Consoles, TVs, Hubs, Motherboards, RJ45 Adapter
Special Feature	Heat Resistant/ High Speed/ UV Resistant/ Water Resistant/ Waterproof/ Weatherproof
Specification Met	IEEE
UPC	741416155990
Unit Count	25 Feet

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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TrustScore 4.5 | 7,300+ reviews

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DbillionDa Cat 8 Ethernet Cable 40Gbps 2000MHz, 25FT Supports Cat7 Cat6 Cat5e Cat5, High-Speed RJ45 Cable, Heavy-Duty Indoor/Outdoor, Gold-Plated, Weatherproof & UV-Resistant for Gaming, PC, Router

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