HP 331T Server Adapter features the next generation of Ethernet. integration offering a single chip solution on a card. further reducing power requirements for 4 ports of 1Gb Ethernet. HP 331T Server Adapter is a low-profile card. with both full height and half height brackets included in the kit. The x4 PCI Express Gen 2.0 interface is compatible with x4, x8, and x16 PCI slots. HP 331T Server Adapter quad-port adapter is ideal for virtualization. security, server consolidation. network segmentation, and other applications requiring maximum throughput and port density.