This is an Intel® I350F4 comparable gigabit Ethernet PCIe x4 network interface card with 4 included SX SFPs that complies with all IEEE 802.3 standards. It provides a high bandwidth 1GbE network speed that fully supports high-end servers. In addition, this supports high level VLAN filtering function, and, based on the Intel I350 chipset, is compatible with Windows, Linux, FreeBSD, and VMware operating systems. The quad open SFP ports allow users to choose from a variety of SFP transceivers to accommodate multi mode and single mode fiber, allowing for customized reach. 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.