Designed for HP ProLiant Gen8 blade servers, the HP InfiniBand FDR/Ethernet 10Gb/40Gb 2P 544M Adapter and HP InfiniBand QDR/Ethernet 10Gb 2P 544M Adapter are based on next-generation Mellanox ConnectX-3 technology and PCI Express 3.0 for unprecedented scalability and fabric flexibility. They are new form factor, dual-ported mezzanine Host Channel Adapters (HCAs) for c-Class server blades, ideal for building scale out solutions. Both deliver low-latency InfiniBand bandwidth, up to 56 Gb/s Fourteen Data Rate (FDR) or up to 40 Gb/s Quad Data Rate (QDR), for performance driven server and storage clustering applications in High Performance Computing (HPC) and enterprise data centers. They can also function as 10 or 40 Gb/s Ethernet adapters. End-to-end Quality of Service (QoS) enables partitioning and guaranteed service levels while hardware-based congestion control prevents hot spots from degrading the effective throughput.