Mellanox Connectx-3 EN Dual Port 40GB Ethernet Adapter CX314A | eBay
Caveat - No rear adapter plate is included.
Info - http://www.mellanox.com/related-docs/prod_adapter_cards/ConnectX3_EN_Card.pdf
Caveat - No rear adapter plate is included.
Info - http://www.mellanox.com/related-docs/prod_adapter_cards/ConnectX3_EN_Card.pdf