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TB3 Active cable performance
 

TB3 Active cable performance  

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teltersat
(@teltersat)
Eminent Member
Joined: 9 months ago
 

Hey guys, I have a question that has been digging through my brain for quite a bit. Is there any performance degradation when you use a long TB3 Active cable (2m) vs a short passive one? (50cm). I'm asking because the way my setup is laid out I really need the 2m cable, but I'm not sure if I'm being penalized for it...

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DrEGPU
(@dregpu)
Trusted Member
Joined: 11 months ago
 

I can give it a try tonight or tomorrow. I've been using a short passive cable with the Razer core X on my desk. I have a 2m active cable on hand. It would be nice to reclaim some desk space!

MBP 2018 15 inch + 2X Aorus gaming box 1080 in BootCamp and MacOS 10.13.6
2011 13-inch MacBook Pro + Razer Core X@10Gbps-TB1 (Zotac RTX 2080 Ti Amp) + Ubuntu 18.04


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odin
 odin
(@odin)
Trusted Member
Joined: 1 year ago
 

I don't think there is a difference. You can always buy it and do some benchmarks, return it if there's a large dip. Frankly I'd probably just use it and see if you NOTICE anything. Benchmarks are good for comparisons, but it's really more important how you feel using it.

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joevt
(@joevt)
Honorable Member
Joined: 2 years ago
 

I don't think cable length matters. Speed of electricity is very fast. an extra 1.5m will add up to a handful of micro seconds to the time it takes for a bit to reach the other end. This is not a problem because many bits are sent before expecting a reply.

Problems can arise if the extra length adds errors but the active part of the cable handles that.

https://9to5mac.com/2018/08/23/back-to-the-mac-011-are-longer-thunderbolt-3-cables-slower-video/

Drop in performance happens when you chain multiple Thunderbolt 3 devices together.

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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nando4
(@nando4)
Noble Member Admin
Joined: 3 years ago

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mac_editor
(@mac_editor)
Noble Member Moderator
Joined: 3 years ago
 

Bandwidth would not be an issue between active vs. passive. I'm interested in seeing latency differences.

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cuppino
(@cuppino)
Eminent Member
Joined: 11 months ago
 
Posted by: @teltersat

Hey guys, I have a question that has been digging through my brain for quite a bit. Is there any performance degradation when you use a long TB3 Active cable (2m) vs a short passive one? (50cm). I'm asking because the way my setup is laid out I really need the 2m cable, but I'm not sure if I'm being penalized for it...

I'm using this ( https://www.belkin.com/us/p/P-F2CD085/) and I'm finding it great!
I haven't had any performance loss, on the contrary it's all very stable!
You can also find it on the apple website. I bought it there.

iMac 27" 5k 2019 (i9 9900k 3,6ghz, 40gb ram ddr4 2666 mhz, ssd 1tb, dgpu Radeon pro vega 48 8gb), Egpu: Razer Core X with ZOTAC GAMING GeForce RTX 2080 Ti AMP Extreme Core
Osx 10.14.6
Windows 10 pro 1903 (bootcamp with external ssd 1tb Samsung evo 860)


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esatamacmodular
(@esatamacmodular)
Estimable Member
Joined: 3 years ago
 
Posted by: @cuppino

I'm using this ( https://www.belkin.com/us/p/P-F2CD085/) and I'm finding it great!

I haven't had any performance loss, on the contrary it's all very stable!

You can also find it on the apple website. I bought it there.

link does not work for me...

So people like the belkin and cable matters. Where does that leave the akitio one?

https://www.akitio.com/cables/40gbps-thunderbolt3-cable-2m

This post was modified 2 months ago

iMac 2013 10.14.1, Macbook Air 2013 10.11, MBP 2016 13" 10.13.6 , HP 4530s 10.11, node lite, DA-2 PSU w/mod, PE4L 2.1b expresscard34, GTX460,1050Ti,1060,1070/Ti RX470,560,580


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cuppino
(@cuppino)
Eminent Member
Joined: 11 months ago
 
Posted by: @esatamacmodular
Posted by: @cuppino

I'm using this ( https://www.belkin.com/us/p/P-F2CD085/) and I'm finding it great!

I haven't had any performance loss, on the contrary it's all very stable!

You can also find it on the apple website. I bought it there.

link does not work for me...

I send you the link to the Apple store. https://www.apple.com/shop/product/HMBH2ZM/A/belkin-thunderbolt-3-5a-cable-2-m?fnode=e5656ecb271d658a9f3d405dc15561e3bf9726a4f69cef69ca98fa108f643cd61956a251d268acb3a18bce582a6326de4ef61eb3049929d43bed4c429daf46b79643cc6e0227758464f794b4ccda862598c4852f4b26a3a7f548990e7f70f65b

Posted by: @esatamacmodular

So people like the belkin and cable matters. Where does that leave the akitio one?

https://www.akitio.com/cables/40gbps-thunderbolt3-cable-2m

has the same features as the belkin cable.
I preferred the belkin because I knew the brand.
With my razer core x it works perfectly.

This post was modified 2 months ago

iMac 27" 5k 2019 (i9 9900k 3,6ghz, 40gb ram ddr4 2666 mhz, ssd 1tb, dgpu Radeon pro vega 48 8gb), Egpu: Razer Core X with ZOTAC GAMING GeForce RTX 2080 Ti AMP Extreme Core
Osx 10.14.6
Windows 10 pro 1903 (bootcamp with external ssd 1tb Samsung evo 860)


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esatamacmodular
(@esatamacmodular)
Estimable Member
Joined: 3 years ago
 

@cuppino

Ok thanks, I see these specs listed for belkin and then akitio - both 2m cables:

Belkin
Thunderbolt 3 male to Thunderbolt 3 male connectors

Transfer data at up to 40 Gbps

Connect to Thunderbolt 3– or USB-C–enabled devices and displays

Supports Thunderbolt/HD displays

Take advantage of up to 100W power delivery

Thunderbolt certified

Akitio:

  • Lightning fast data transfer rates up to 40 Gbps
  • Supports Thunderbolt™ and USB 2.0 protocols
  • Supports power delivery up to 100W
  • Reversible USB-C connector

maybe the belkin is more versatile?

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joevt
(@joevt)
Honorable Member
Joined: 2 years ago
 

@esatamacmodular

You need to remove the trailing parenthesis )
https://www.belkin.com/us/p/P-F2CD085/

If you go to that link, it says the cable only does Thunderbolt 3 and USB 2.0, just like the AKiTiO cable. It does not do USB 3.x or DisplayPort (unless they are encoded as Thunderbolt and a Thunderbolt device does the Thunderbolt PCIe packet to PCIe conversion for a USB 3.x controller or Thunderbolt DisplayPort packet to DisplayPort conversion for a DisplayPort display).

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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cuppino
(@cuppino)
Eminent Member
Joined: 11 months ago
 
Posted by: @esatamacmodular

@cuppino

Ok thanks, I see these specs listed for belkin and then akitio - both 2m cables:

Belkin
Thunderbolt 3 male to Thunderbolt 3 male connectors

Transfer data at up to 40 Gbps

Connect to Thunderbolt 3– or USB-C–enabled devices and displays

Supports Thunderbolt/HD displays

Take advantage of up to 100W power delivery

Thunderbolt certified

Akitio:

  • Lightning fast data transfer rates up to 40 Gbps
  • Supports Thunderbolt™ and USB 2.0 protocols
  • Supports power delivery up to 100W
  • Reversible USB-C connector

maybe the belkin is more versatile?

I have not tried the akitio cable.
I know belkin as a brand and its products are always of excellent quality.
I am very satisfied with the cable, everything is more stable!
The specifications of the two cables are identical. I think you won't have any problems with either of them.
I can recommend you the belkin because I have it, I use it with the egpu in the signature and it works really well.

iMac 27" 5k 2019 (i9 9900k 3,6ghz, 40gb ram ddr4 2666 mhz, ssd 1tb, dgpu Radeon pro vega 48 8gb), Egpu: Razer Core X with ZOTAC GAMING GeForce RTX 2080 Ti AMP Extreme Core
Osx 10.14.6
Windows 10 pro 1903 (bootcamp with external ssd 1tb Samsung evo 860)


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tsakal
(@tsakal)
Estimable Member
Joined: 1 year ago
 

@teltersat

I have the caldigit  2m cable and it performs very similar to to boy the 60cm Belkin active and 90cm apple cable. Just make sure it is a true 40g tb3 cable. If I remember well 9to5mac and vtudio have YouTube Videos comparing the cables to 

https://www.amazon.de/CalDigit-Thunderbolt-3-Kabel-Zertifiziert-Typ-C-kompatibel/dp/B01N4MFG7J/

This post was modified 2 months ago

A. 2.7 GHz I7 4 Cores, 16Gb, 1TB MBP 13 2018 TB3 , EGPU Gigabyte Gaming Box RX580 8Gb

B. 3.1 GHz I7, 16Gb, 1TB MBP 13 2015 TB2 , EGPU Gigabyte Gaming Box RX580 8Gb


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