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No, there's just a lot more that can be said than they wanted to fit on this one page.

I was asking about their NIC, not switch.

They use Chelsio NICs - I've heard them mentioned on one or other of their podcasts.

The NIC is a chip-down Chelsio T6 ASIC with 2x100GbE ports, one going to each Ethernet switch in the rack.