Sewell USB 4.0 Type C 20Gbps Cable, USB-IF Certified, 8K 240w, 6.5 ft. (2m)

Sewell USB 4.0 Type C 20Gbps Cable, USB-IF Certified, 8K 240w, 6.5 ft. (2m)

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starburstases posted on r/usbchardware6w

I'd say stick with this lineup for USB4 40/80Gbps cables up to 5ft (the longest certified 40Gbps passive cables are 5ft - also note that certified passive 40Gbps cables can carry 80Gbps since the electrical requirements are identical). The 5ft and 3.9ft are certified and the shorter ones aren't - but they're likely using the same cable stock so I'd say the risk of them not working is very low. The pricing is very reasonable. Cable Matters [USB-IF Certified] 80Gbps USB 4 Cable The Amazon Basics USB4 3.3ft cable is also excellent value, and certified: Amazon Basics USB-C to USB-C 4 Fast Charger Cable If you want 40Gbps or faster in 6.6ft length you need an active cable, and right now I believe the only certified active cables are certified through Thunderbolt. I really like this cable - I think it's the best value. ACASIS Intel Certified Thunderbolt 4 Cable 6.6ft Passive 6.6ft USB4 20Gbps cables are cheaper though. I think this is the cheapest right now. I have one and like it. Sewell USB 4.0 Type C 20Gbps Cable, USB-IF Certified As an aside, if you want the bleeding edge in passive cables, this one hit the market recently. 20Gbps and 10ft long. StarTech 10ft (3m) USB4 Cable, 20Gbps, USB-IF Certified