The Startech ST10GSPEXNB2 network interface card is a PCI Express (PCIe) x2 10 GbE adapter designed for servers and computers requiring high-speed, reliable network connectivity. It supports six distinct speeds, including 10, 5, 2.5, 1 Gbps and 100, 10 Mbps, enabling integration with existing network infrastructures, even older hardware. Featuring 10GBASE-T and NBASE-T technology, this card maximizes Cat5e copper cabling up to 100 meters, with optimal performance over Cat6 or higher. Its host interface is compatible with PCIe 3.0 and 4.0 x2 slots, allowing efficient data transfer and flexible installation thanks to included standard and low-profile brackets. The Marvell AQC113CS chipset ensures stable transfer and supports advanced features like audio-video bridging (AVB), VLAN tagging, jumbo frames up to 16K, full duplex, secure boot, and PXE, essential for professional environments with advanced networking needs. The black design offers a sober, professional look fitting most system interiors. Compatible with Windows, Windows Server, and Linux, this card covers a wide range of applications, from online storage and FTP backup to smooth streaming of high-demand content. In summary, the Startech ST10GSPEXNB2 is a reliable, versatile solution that significantly enhances bandwidth and network stability for users requiring high performance via wired RJ45 Ethernet connections.