This is a HP® 811546-B21 comparable gigabit Ethernet PCIe x4 network interface card with quad RJ-45 ports that complies with all IEEE 802.3 standards. It provides a high bandwidth 10/100/1000Mbs network speed that fully supports high-end servers. In addition, this supports high level VLAN filtering function and, based on the Intel 82580 chipset, is compatible with Windows, Linux, FreeBSD, and VMware operating systems. The quad RJ-45 port slot operates over copper patch cable, allowing an operating distance of 100m. Our network interface cards are 100% compliant for all of your networking needs. Now you have a cost effective solution to your network upgrade needs. With our certification test program, we can guarantee your product will work right the first time.