1、ETHERNET PORTS: You can add 10/100/1000/25000 Mbps Ethernet ports to any PC via PCIE slots, fitting any PCI Express x4, x8 or x16 slot. 2、5 GIGABIT ETHERNET: The Gigabit ethernet card provides simple connectivity to 5 Gigabit Ethernet and is fully compatible with 801Q virtual LAN (VLAN) tags. 3、STANDARDS COMPLIANT: 5 gigabit pcie network adapter is compliant with IEEE803, IEEE803u and IEEE803ab standard Ethernet cards. 4、OS COMPATIBLE: The 4 port RJ45 gigabit ethernet card is compatible with multiple operating systems including for Windows 10, for 8/8.1, for 98SE, for ME, for 2000, for XP, for XP 64bit, for Vista, for Vista 64bit, for for 7, for 7 64bit, for Linux, for OS X 10.7. 5、EASY INSTALLATION: The PCIe 5 Gigabit NIC comes with a 12cm form factor bracket and additional 8cm form factor bracket for easy installation in small/thin computer cases/servers. The use of a heat sink reduces network temperatures and ensures stable operation of the card. 1 x Network Card1 x Bracket Item Type: Quad Port  2.5G Base T PCIe Network AdapterMaterial: PCBBus Interface: PCIE X4Transmission Rate: 10/100/1000M/ 2.5GbpsApplicable Network Type: EthernetPort Type: RJ45Chip: For Intel I225