You can get 40 Gbps infiniband cards for $200 now a days. The switches are a bit expensive (you can probably find them for 3-4K if you look hard enough), but t

You can get 40 Gbps infiniband cards for $200 now a days. The switches are a bit expensive (you can probably find them for 3-4K if you look hard enough), but that's not that expensive for a data center.