Features 1、COMPATIBILITY: Compliant with PCI Express basic Specification 2.0 (5GTs) and backward compatible with Specifications 1.1 and 1.0A. PCI Power Management Specification 1.2 2、SUPPORTED FUNCTIONS: Support 10/100/1000 automatic configuration. Supports exchange/polarity/skew correction, crossing detection and automatic correction. Support wake up on LAN and remote wake up 3、RELIABLE and STABLE: Support for Microsoft NDIS5, for NDIS6 checksum offloading (IPv4, IPv6, TCP, UDP) and segmentation tasks, offloading (mass delivery v1 and bulk delivery v2) 4、CONVENIENT and PRACTICAL: Support EMAC‑393ECMA ProxZzzy main body sleep standard. Supports full duplex flowing control (IEEE802.3X). Support jumbo frames 5、USE with CONFIDENCE: Fully according with IEEE 802.3, IEEE 802.3u standards, and IEEE 802.3ab standards. Support IEEE 8021.p layer 2 priority coding (priority sorting). Support IEEE 802.1Q VLAN tag (virtual local area network). Support IEEE 802.3az‑2010 (EEE) 6、SAFE and DURABLE: Support power off/drop out power saving/PHY disable mode. Support PCI message signal interrupt (MSI and MSI‑X). Support quad core receiver adjustment (RSS). Support protocol offloading function (ARP and Ns) 7、ECC and CRC: Supports 2 x 1 channel 2.5Gbps PCI Express buses. Support hardware ECC function. Support hardware cyclic redundancy check (CRC) function Specification Item Type:Internal Computer Networking Cards Material: PCB Main Control Chip: RTL8111G Bus Interface: PCIE (support PCIE X1 X4 X8 X16) Network Interface: RJ45 x4 Transmission Rate: 10/100/1000Mbps Product Size: (manual measurement allows errors) Length: Approx. 120mm/4.7in Width: Approx. 120mm/4.7in Height: Approx. 20mm/0.8in Support System: For Win XP, for Win7, for Win8, for Win8.1, for Win10, for Linux, Etc. 99% of the Operating Systems and Soft Routers on the Market, NAS, Virtualization, Etc. Package List 1 x Internal Computer Networking Cards 1 x Driver CD 1 x Baffle 2 x Screw