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USB 4 vs Thunderbolt 4 vs Thunderbolt 3 cables  


New Member
Joined: 4 months ago

I think I am getting slow connection speeds on a Thunderbolt 4 host?

Lenovo Thinkpad L14 Gen2 with Intel 11. gen with a GTX 1060 6GB in the Razer Core X.

Cuda-Z shows:
1500 MiB/s Host to Device
1700 MiB/s Device to Host
56 Gib/s Device to Device

I am not sure, but I belive my cable might be the reason?

Looking at cables I see I can choose between:
Thunderbolt 3 - 40GBPS
Thunderbolt 4 - 40GBPS (with certification)
USB 4.0 - 40GBPS (with certification)

USB 4.0 seems to be the cheapest.
Are there any pros or cons to choosing either cable technologies?

Any assistance provided would be greatly appreciated.


This topic was modified 4 months ago

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.


ikir liked
Estimable Member Moderator
Joined: 3 years ago


Thunderbolt 4 is essentially Thunderbolt 3 but with all the maximum possible throughput / features guaranteed.

USB 4 is like Thunderbolt 3 in the sense that it has an optional feature set depending on how it is integrated by the manufacturer.

I would recommend getting an Intel Certified Thunderbolt 4 cable, which guarantees all the maximum specifications of all these cables.

thunderbolt 4 comparison 01


2021 14" Lenovo Yoga Slim 7i Pro (MX450) [11th,4C,H] + RTX 3060 Ti @ 32Gbps-TB4 (Wikingoo eGPU) + Win10 21H1 [build link]