Caldigit Element Hub and Aorus gaming boxes
I was lucky enough to grab a Aorus Gaming box 3090 and thought I'd try running it at the same time as my older AGB 2070. I got the Caldigit TB4 Elements Hub, thinking that would do the trick. Alas, the aorus gaming boxes all seem to want to be the first device in the chain. I'm not sure how the element hub is wired so it's possible there's something up with that. I'd appareciate any advice anyone has, otherwise this is just a FYI post.
@dregpu, Which host machine are you connecting to?
The CalDigit Element Hub uses the Goshen Ridge Thunderbolt 4 peripheral controller for one upstream and three downstream Thunderbolt 4 ports. The Goshen Ridge has a single USB port connected to a four port USB 10 Gbps hub for USB functionality of the three downstream Thunderbolt ports. The fourth port of the hub connects another four port USB 10 Gbps hub for the four USB-A ports.
@joevt Did you ever test that? I can try testing the element hub on my Mac Pro running Win10 in Bootcamp tomorrow or the next day. Although, other than plugging my eGPU's in, I'm not sure how to really test this.
@dregpu, I haven't gotten around to reinstalling Windows.
To test the hub, you need to connect any Thunderbolt device to the hub. If that works, then there's no reason a GPU shouldn't work (except Nvidia drivers?).
Macs allow GPUs to be chained (they don't need to be first in the chain - I think @itsage has done tests of that). Is that true with Windows? I remember it was true at some point (Thunderbolt software shows an error message?) - I don't remember if that was changed.
@dregpu, yes, at least they're detected. Is this behaviour on the Mac Pro different than the Dell? Can the Dell detect the eGPUs connected to the Element Hub? Do you have any other Thunderbolt devices to test the Element Hub?
I believe the point of this experiment is to get more than one eGPU working with the Dell, which is limited by a single Thunderbolt port? The Dell supports either eGPU when connected by itself?
I don't think I can help solve the problem but it would be nice to know what does and doesn't work.
Yes, the Mac Pro is able to more or less detect and connect the eGPUs on the Mac Pro, presumably with Apple’s thunderbolt expertise. On the Dell, the boxes complain about not being #1 on the TB chain. This using the elements hub on both.
The eGPUs work just fine in Bootcamp on the Mac Pro, even if they’re on the same TB3 controller, ie both on the back or both on the top.
The Dell can handle each eGPU by itself but the elements hub doesn’t allow them both simultaneously. At least not for me.