Has anyone tried AliExpress TB3 to PCI-E cable?
This is my first post here, so please don't go too rough on me
Before reading through the reviews and guides on this site, I had been eyeing on this cable:
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.
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.
"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."
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.
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.