25G Network Card(NIC), Single SFP28 Port, X8 Lane, Mellanox® ConnectX-4 Lx Chip, Compare to ConnectX®-4 Lx EN

ConnectX-4 Lx EN Network Controller with 25Gb/s Ethernet connectivity addresses virtualized infrastructure challenges, delivering best-in-class and highest performance to various demanding markets and applications.
Providing true hardware-based I/O isolation with unmatched scalability and efficiency, achieving the most cost-effective and flexible solution for Web 2.0, Cloud, data analytics, database, and storage platforms.
ConnectX-4 Lx EN provides an unmatched combination of 25GbE bandwidth, sub-microsecond latency and a 75 million packets per second message rate.
It includes native hardware support for RDMA over Converged Ethernet, Ethernet stateless offload engines, Overlay Networks, and GPUDirect® Technology.