> But what about builds that combine 8 of the 5090 with infiniband between boxes? Why Infiniband ("IB")? If it's for RDMA, that is possible with certain Ethern

> But what about builds that combine 8 of the 5090 with infiniband between boxes? Why Infiniband ("IB")? If it's for RDMA, that is possible with certain Ethernet cards/chipsets as well. Certainly Mellanox, but Broadcom: * https://techdocs.broadcom.com/us/en/storage-and-ethernet-connectivity/ethernet-nic-controllers/bcm957xxx/adapters/RDMA-over-Converged-Ethernet.html https://techdocs.broadcom.com/us/en/storage-and-ethernet-con... and Intel as well: * https://www.intel.com/content/www/us/en/support/articles/000031906/ethernet-products/700-series-controllers-up-to-40gbe.html https://www.intel.com/content/www/us/en/support/articles/000... Link level flow control or priority flow control needs to be supported on the switch ports as well.