Features: 1.NIC Controller: Based on for Realtek RTL8111H chipset, supports Single Root I/O virtualization and improves server stability. 2.4 RJ45 Ports: RJ45 port (10/100/1000Mbps) to connect Cat5 UTP Cat3 UTP. PCIe x1 Lane, compatible with PCIE X4, X8, X16 slots. 3.Supported Operating Systems: The PCI Express Ethernet LAN adapter supports for Windows Server for Linux for VMware. 4.Easy Installation: Includes thin and full height brackets for standard and ultra thin computer servers for easy installation. 5.Premium Materials: Made of PCB, it is strong, durable, not easy to damage, and has a long service life. specification:Item Type: PCIE NIC Network Card Material: PCB Main Control Chip: RTL8111H Bus Interface: Desktop PCIE X1 Slot, Compatible with X4 X8 X16 Network Interface: 4 x Ethernet Port Transmission Rate: 10/100/1000 Mbps s Compliant: Pci Express Base 2.0 (5gts) and Backward Compatible with s 1.1 and 1.0A, Pci Power Management 1.2 10/100/1000 Auto Configuration: Support Swap Polarity Skew Correction, Crossing Detection and Auto Correction: Support Wake on Lan and Remote Wake: Support Ndis5, Ndis6 Checksum Offload (ipv4, Ipv6, Tcp, Udp) and Split Task, Offload (bulk Transfer V1 and Bulk Transfer V2): Support EMAC 393 ECMA ProxZzzy Host Sleep Standard: Support Full Duplex Flowing Control (ieee 802.3x): Support 9k Bytes Jumbo Frame: Support Compliant with Standards: Ieee 802.3, Ieee 802.3u Standard, Ieee 802.3ab Ieee 802.1p Layer 2 Priority Coding (prioritization): Support Ieee 802.1q Vlan Tagging (virtual Local Area Network): Support Ieee 802.3az 2010 (eee): Support Power Down Drop Power Save PHY Disable Mode: Support Pci Message Signaled Interrupt (msi and Msi x): Support Quad Core Receiver Regulation (rss): Support Protocol Offload Function (ARP NS): Support Two 1 Lane 2.5gbps Pci Express Buses: Support ECC Function: Support Hardware Cyclic Redundancy Check (crc) Function: Support PackageList:1 x PCIE NICNetworkCard 1 x Screw 1 x Metal Baffle