AddOn Network Upgrades ADD-PCIE-4RJ45 is a quad RJ45 Ethernet Port Gigabit PCI-E X4 Server Network Interface Card that complies with all IEEE 802.3 standards. It provides a high bandwidth 1Gb network speed that fully supports high-end servers. In addition, the ADD-PCIE-4RJ45 supports high level VLAN filtering function, and is compatible with Windows, Linux, FreeBSD, and VMware operating systems. The quad RJ45 Ethernet Port slot operates over Copper, allowing an operating distance of 100m. AddOn's Server Network Interface Cards are 100% compliant for all of our networking needs. Now you have a cost effective solution to your network upgrade needs. With our ADDON CERTIFICATION TEST Program, we can guarantee your product will work right the first time.