Reliable 25 Gigabit Ethernet via Thunderbolt

I'm surprised you are only getting 20gbit/s. I did not expect PCIe to be be the limiting factor here. I've got a 100gbit cx4 card currently in a PCIe3 X4 slot (for reasons, don't judge) and it easily maxes that out. I would have expected the 25g cx4 cards to be at least able to get everything out of it. RDMA is required to achieve that in a useful way though.

Edit: forgot is isn't "true" PCIe but tunneled.

Note that you can do point-to-point network links directly with thunderbolt (and usb4).

https://support.apple.com/guide/mac-help/ip-thunderbolt-conn... etc

Thunderbolt is basically external PCIe, so this is not so surprising. High speed NICs do consume a relatively large amount of power. I have a feeling I've seen that logo on the board before.

I still have issues under Linux (Kernel 6.14) and Thinderboldt 4 docking stations. The simply don't get recognised.

But this is a cool solution

Neat, but the thermal design is absolutely terrible. Sticking that heatsink inside the aluminum case without any air circulation is awful.

> reduces temperatures by at least 15 Kelvin, bringing the ambient enclosure temperature below 40 °C,

I had to do a double-take when it mentioned Kelvin since That is physically impossible.

Now I just have to contrive the circumstances where this is useful to me. :)