I am building my personal private cloud. I am considering using second hand dell optiplexes as worker nodes, but they only have 1 NIC and I’d need a contraption like this for my redundant network.
Then this wish came to my mind. Theoretically, such a one box solution could be faster than gigabit too.
I’m going to go a different route than your question. If you have a spare m.2 slot and room in your PC, you can install a m.2 network adapter. I recently installed a m.2 to 2.5gbe adapters in a Dell 3060 SFF as a proof of concept at home for getting Proxmox ceph cluster working over 2.5gbe.
I used this adapter. https://www.ebay.com/itm/256214788974?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=96RQC3CqQ_u&sssrc=4429486&ssuid=9BfwgvpgRMG&var=&widget_ver=artemis&media=COPY
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Oh that’s nice. I have a second m2 slot in my TH80. Putting a stronger network card there could be a cool future upgrade