Has anyone tried AliExpress TB3 to PCI-E cable?
 
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Has anyone tried AliExpress TB3 to PCI-E cable?  

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EuphoricCatface
(@euphoriccatface)
New Member
Joined: 1 year ago
 

This is my first post here, so please don't go too rough on me Smile

Before reading through the reviews and guides on this site, I had been eyeing on this cable:
https://www.aliexpress.com/item/CY-Type-C-Thunderbolt-3-to-PCI-Express-PCI-E-SSD-Nvme-NGFF-M-key-Convert/32850429775.html

Now that I know better, I get that it's much more sensible to just buy a box on a fair deal, but the curiosity hasn't fully died out.

The cable seems to have legit x4 PCI-E connector and matching pinout (the leads between the main chip and the slot), so maybe you could hook it up with a PSU to make a eGPU system? Like, connecting GND between the two, soldering +12v0 and +3v3 lines to add more power into the slot, and then maybe adding a s/w or a simple detecting circuit to tell the PSU that it has to wake up?
The resulting device won't have PD to power a laptop, and might not send the processed signal back to the host, but other than these, I see no problem with this.

I have searched a bit, but haven't found anyone trying something like this. What is your opinion? Does it sound plausible, or utter nonsense?
Again, I know it isn't favorable at all over a decent sale. It's just out of my pure curiosity.

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

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Yukikaze
(@yukikaze)
Prominent Member Moderator
Joined: 4 years ago
 

I've seen these before on ebay for about 140$, so if you want to try it, I'd start there to save a few bucks. I would expect this to work (I've gotten some weird things working as eGPUs already), but it is a waste of money as you can get a full enclosure for not much more than this (the Sonnet Breakaway 350 is at or under 200$ constantly, and the Powercolor Gaming Station is again on sale for 200$). The easiest way to make this PCB work is by adding a powered riser and a power supply. That will take care of any power considerations.

But again, it doesn't make financial sense.

Want to output [email protected] out of an old system on the cheap? Read here.
Give your Node Pro a second Thunderbolt3 controller for reliable peripherals by re-using a TB3 dock (~50$).

"Always listen to experts. They'll tell you what can't be done, and why. Then do it."- Robert A. Heinlein, "Time Enough for Love."

 
2012 14" Lenovo Thinkpad T430s [3rd,2C,M] + RX 550 @ 10Gbps-TB1 (Atto Thunderlink) + Win10 [build link]  


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EuphoricCatface
(@euphoriccatface)
New Member
Joined: 1 year ago
 

Okay, Thanks for your reply!

I have another question regarding that. Where do you get a powered riser, other than 1x to 16x? I have never seen one for 16x to 16x, or 4x to 16x.
Uh... except for Akitio Thunder3 riser board maybe.

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

.

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nando4
(@nando4)
Noble Member Admin
Joined: 4 years ago
 

A slight variation is the use of a M.2 (NVME) eGPU adapter + NVME-to-TB3 adapter. See the following discussion. The beauty here is you can use the eGPU adapter either with a M.2 slot or TB3 port.  Take a peek at the Forza benchmarks to see the greatest disparity in performance between these two interfaces.  Hint: M.2 is the clear performance leader. This may get the interest of gamers.

eGPU Setup 1.35    •    eGPU Port Bandwidth Reference Table

 
2015 15" Dell Precision 7510 (Q M1000M) [6th,4C,H] + GTX 1080 Ti @32Gbps-M2 (ADT-Link R43SG) + Win10 1803 [build link]  


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