Thunderbolt cable included in package only 2.0 - 20Gb/s


#1

Hi Folks,

Has anybody else noticed that the Thunderbolt cable included in the package is a 2.0 as opposed to 3.0 version?

The cable that I received has clearly a sticker on it indicating 20Gb/s as opposed to the expected 40Gb/s.

Any thoughts from others that ordered the thunderbolt cable?


#2

TB 2 has another port. It’s a TB3 cable with 20GB/s… Not more not less…


#3

But tb 3 should do 40gb/s
Edit: looks like it depends on the lenght of the cable.


#4

the cable provided is not particularly long … I’d be surprised if it couldn’t manage 40Gb/s.


#5

You mean the charging cable that came with the V? It’s not Thunderbolt, only USB-C. And, according to the webstore, it’s only a USB 2.0 cable, so it’s transfer speeds shouldn’t be fast.


#6

nope … I mean the Thuinderbolt cable 3.0


#7

Are you sure your cable really is 50cm? 1m cables and longer are always 20Gbps.


#8

it’s what I ordered … and what was made available … this is from the original backerit webshop … I only picked and paid for what was available there.

it’s 0.5 meters.


#9

Ah, sold only on backerkit/IGG.

I’m not sure how you’re testing the speed of this, but the connected device must also support full thunderbolt. Also, it’s possible your V isn’t using all 4 PCIe lanes for thunderbolt. Has anybody conclusively tested that the V has full TB3 bandwidth?


#10

Don’t worry bruv! I got your back!

This is the Gbps in question. It’s a little label attached to a 0.5m cable.

I think I should be in the unique position to conclusively answer this, does anyone know how / if I can

  1. confirm the bandwidth on this cable?
  2. confirm that the V uses 4 PCIE lanes for TB3? (although i think the egpu kind of is proof)

I also have a separate TB3 cable that came with my egpu for comparison if that helps.


#11

hmm. actually, it looks like there aren’t going to be many situations where it would be an issue.


#12

you’ll need an i7-7700 and NVME SSD that can do at least 2500mbps read/write to saturate 20gbps connection, so get ready to cough up the moolah :smirk:


#13

or you’d need two 4K @ 60 Hz … it’s not that difficult to saturate such a link.

That’s what I was hoping that the Donald Dock would help out and I’d have the cable ready for it.

Maybe anybody that has done some eGPU testing can comment … video cards gobble up all the bandwidth that they can get.


#18

maybe it’s mentioned in the egpu thread?


#19

Hey! i found something! Look what happens to this list when i…

plug my phone into the TB3 port:

And here are the devices:

Does this confirm that we have x4 PCIE? I dunno, lol.

I need to reinstall nvidia drivers so i can check, i’ll do it tomorrow if nobody else pops in to give an answer.


i took a picture. its really tiny but it says x4 there.

image


#20

I have been using the Eve with an aorus gaming box grx1080. Looks like it’s only 2 Lanes. With cuda z I only get around 1600 on the h2d


#21

@Xify maybe you can help us with this? IIRC you did a lot of work on GPU testing


#22

You need an active or a short 0.5m cable to get the 40gb/s, albeit it might be that not all short cables do support the full speed.


#23

by that logic, its actually 0 lanes because i dont know what h2d is and cuda z is giving me nothing.


#24

251%2064%20bit%2005-Mar-18%2011_37_46%20PM251%2064%20bit%2005-Mar-18%2011_38_58%20PM