In my experience 40G gear can often be had for cheaper than 10G. I have a pair of Mellanox 40G Infiniband cards that cost me about $20 each on ebay and could b

In my experience 40G gear can often be had for cheaper than 10G. I have a pair of Mellanox 40G Infiniband cards that cost me about $20 each on ebay and could be turned in to Ethernet cards with a few commands.