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December 11, 2016
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ekael's Reviews

Belkin - 38" Thunderbolt 3 (USB-C) Cable - Black

Experience crisp definition when you stream video over this Belkin Thunderbolt 3 cable. The USB-C male to USB-C male connector connects your laptop or other devices to your monitor for sharp Ultra HD displays. The super-fast 20 Gbps transfer rate of this Belkin thunderbolt 3 cable makes transferring data a snap.

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Customer Rating

Description is wrong. Passive TB3 cable = 20Gbps

on December 11, 2016

Posted by: ekael

There is nothing inherently wrong with this cable, BUT I do want customers to be aware that Best Buy's product description is WRONG and MISLEADING and I don't want customers to purchase this without knowing it's true capabilities. All Thunderbolt 3 cable are not created equal. There are 2 types of cables - Passive and Active. I will explain the difference.

PASSIVE Thunderbolt 3 - These cables are only capable of delivering 40Gbps speed if they are 0.5M or less in length. 1M (like this cable) and 2M cables are only capable of delivery 20 Gbps. This is important to keep in mind for a few reasons:
1) "This cable" can NOT run a 5K display as Best Buy's description claims because it is 1M passive cable and can't deliver the required bandwidth to drive a 5K display
2) Not an ideal choice if you plan on hooking up high speed SSD raids, for example, because real world speeds will top out between 1300 MBps - 1500 MBps. (Similar to TB2)

ACTIVE Thunderbolt 3 - These cables are capable of delivering the claimed 40 Gbps at 1M and 2M lengths because they have special chips built into each end that allow them the highest possible data transfer speeds over longer distances. I like to think of these chips like signal boosters that are often used when a really coaxial cable is required. Without those boosters the signal degrades, similar to these cables speed loss over longer distances.
1.) These cables are REQUIRED to run a 5K display at this time (unless you are using a 0.5M or less passive cable.

In summary - Best Buy's information about this "Passive TB3 Cable" so do not buy it if you want to use it with a 5k display or want the fast 40 Gbps connection for high speed storage.

My Best Buy number: 1049117926

No, I would not recommend this to a friend.

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