Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Type: Cable Adapter _x005f_x000D_ Package: Yes _x005f_x000D_ Type: 4 ports, 2 ports, 1 port (optional) _x005f_x000D_ Main control chip: RTL8125BG * 4 _x005f_x000D_ Interface type: PCI-E _x005f_x000D_ Network speed: Supports 2.5 Gigabit Ethernet speed, backward compatible with Gigabit Ethernet speed _x005f_x000D_ Number of network ports: 4 2.5G Gigabit network ports (capable of connecting four devices simultaneously) _x005f_x000D_ Applicable device: desktop computer (requires motherboard with PCI-E slot) _x005f_x000D_ Compatibility: Compatible with most operating systems, such as for Windows, Linux, etc _x005f_x000D_ 1 port size: 68.00x54.00x25.00mm/2.68x2.13x0.98inch _x005f_x000D_ 2 port size: 87.00x56.00x25.00mm/3.43x2.2x0.98inch _x005f_x000D_ 4-port size: 105.00x57.00x25.00mm/4.13x2.24x0.98inch _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x 2.5GB PCIe Network Card 1.High Performance Network Adapter: The IPCIe network card is a PCIe to 4-port 2.5G Ethernet network adapter that supports speeds of up to 2500 Mbps. It is ideal for gamers and applications that require faster network speeds than Gigabit Ethernet. This adapter is compatible with existing Ethernet devices, providing high-performance dual-channel networking and full-duplex communication. 2.Extensive System Compatibility: This network adapter supports multiple operating systems and platforms, including for Hackintosh, ESXI 6.7 (not compatible with 7.0), PVE, ikuai, unraid 6.9.2, and OpenWrt. It is plug-and-play for Windows systems, while Linux, TrueNAS/FreeNAS, certain versions of OpenWrt, and older versions of ikuai may require driver installation. 3.Intelligent Networking Features: The PCIe network adapter has auto-negotiation capabilities and is compatible with the NBASE-TTM alliance PHY specifications. It supports hardware-based ECC and CRC, flow control, and various power-saving modes, making it suitable for energy-efficient environments. 4.Advanced Network Standard Support: This PCI Express gigabit ethernet card supports multiple Ethernet standards, including IEEE802.3bz (2.5 GBase-T), IEEE802.3az (Energy-Efficient Ethernet), IEEE802.3, IEEE802.3u, and IEEE802.3ab. It ensures device performance while maintaining excellent energy efficiency. 5.Installation and Maintenance Recommendations: For installation requirements on different operating systems, it is recommended to check the driver requirements based on your system. Windows users can enjoy the convenience of plug-and-play, but for optimal performance, it is advised to download the latest drivers from the Realtek official website. For DSM 6.2 and above versions and ESXI 6.7U3, driver installation is required, while PVE 7.0 and above versions come with built-in plug-and-play support.