This PCIe to 4-port 2.5G Ethernet network adapter can 2.5 Gigabit Ethernet network faster than Gigabit network speed, support high-performance dual-channel network and full-duplex communication to achieve speeds up to 2500 Mbps and fast transfer rate, compatible with existing Ethernet.Driver Download: https://.realtek./-/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit-ethernet-pci--softwareSupports 2.5G Lite (1G data rate) mode. Supports PCI 2.1. Supports 4 high performance 2.5-Gigabit LAN ports. Auto-Negotiation with Extended Page capability (XNP). Compatible with NBASE- PHY Specification.Supports pair swap/polarity/skew correction. Crossover Detection & Auto-Correction. Supports hardware ECC (Error Correction Code) functionSupports hardware (Cyclic Redundancy Check) functionTransmit/Receive on-chip buffer supportSupports PCI (Message Signaled Interrupt) and -XSupports power down/link down power saving/PHY disable modeSupports ECMA-393 ProxZzzy Standard for sleeping hostsSupports LTR (Latency Tolerance Reporting)Supports 32-set 128- pattern exact matchingSupports WPI (Wake Packet Indication)Supports PCIe L1 substate L1.1and L1.2Compatible with IEEE 802.3, IEEE 802.3u, IEEE 802.Supports IEEE 1588v1, IEEE 1588v2, IEEE 802.1AS time synchronizationSupports IEEE 802.1Qav credit-based shaper algorithmSupports IEEE 802.1P Layer 2 Priority EncodingSupports IEEE 802.1Q VLAN taggingSupports IEEE 802.1ad Double VLANSupports IEEE 802.3az (Energy Efficient Ethernet)Supports IEEE 802.3bz (2.5GBase-T)Supports Full Duplex flow control (IEEE 802.3x)Supports jumbo to 16K Supports standard and low chassisSystem RequirementWindows OSLinux, for OS and PCI -enabled system with an available PCI slot.Material: PCB+Metalcolour: blackPackage Contents:1 x PCI- to 4 Ports 10 /100/1000M/2.5G Ethernet Card1 x Low- bracketOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.