Dual-port 2.5Gbps PCIe Network Adapter (RTL8125BG) Why this card matters Upgrade an older PC or server to multi-gigabit networking without rewiring: two 2.5 Gbps RJ45 ports deliver higher throughput over standard Cat5e cabling up to 100 m. Add redundancy or separate networks: dual ports let you run two independent connections or combine links for higher bandwidth or failover. Built for real-world networks: hardware support for VLANs, QoS priority, PXE booting and automatic MDI/MDIX simplifies deployment and management. Key features and benefits Dual 2.5 Gbps ports: Two independent 2.5Gigabit Ethernet ports for faster file transfers, backups, streaming, and low-latency workloads. Realtek RTL8125BG chipset: Reliable, widely supported silicon that delivers stable 2.5GBASE-T performance. Cat5e compatible, 100 m max distance: Works with standard Cat5e cable for up to 100 meters, so you often do not need to replace existing cabling. PCIe slot installation: Fits standard PCIe slots and includes a low-profile bracket so you can install it in desktop PCs and small form-factor servers. Network management and boot support: Supports PXE network booting for diskless setups or remote imaging. Traffic and link intelligence: Automatic MDI/MDIX removes need for crossover cables; supports IEEE 802.1Q VLAN tagging and IEEE 802.1P Layer 2 priority coding for traffic segmentation and QoS. Standards compliant: Meets IEEE 802.3bz (2.5GBASE-T) to ensure interoperability with multi-gig switches and routers. Drivers and documentation: Driver and manual download link printed on the bracket for easy access to installation files. Compatibility and installation Fits into a standard PCIe slot; low-profile bracket included for SFF cases. Works over Cat5e cabling up to 100 meters; compatible with 2.5GBASE-T network equipment. Driver and manual download link provided on the physical bracket to simplify setup. Typical use scenarios Home office or small business NAS: Connect a workstation or server to a 2.5G switch/NAS for faster backups and large file transfers without replacing existing Cat5e cabling. Multi-purpose desktop or compact server: Install in a desktop or small-form-factor server to add a second network interface for separate networks, backup links, or link aggregation. PXE-based deployments and virtualized environments: Use PXE support to boot devices over the network for OS imaging, remote installations, or diskless nodes; use VLAN tagging and Layer 2 priority for traffic separation and performance tuning. What it delivers Simple hardware upgrade path to 2.5 Gbps networking Dual-port flexibility for increased capacity or network separation Standards-based features for interoperability and manageability Specifications (as supplied) Chipset: RTL8125BG Ports: 2 × 2.5 Gbps RJ45 Cabling: Supports Cat5e; maximum transmission distance 100 m Standards: IEEE 802.3bz (2.5GBASE-T), IEEE 802.1Q VLAN tagging, IEEE 802.1P Layer 2 priority coding Other: PXE support, Automatic MDI/MDIX Physical: PCIe card with included low-profile bracket Support: Driver and manual download link printed on the bracket If you need a straightforward way to add reliable, standards-compliant 2.5 Gbps networking to desktops or servers while keeping existing Cat5e cabling, this dual-port PCIe adapter provides a practical, installation-ready solution.