The QNAP QXG-25G2SF-CX6 is a high-performance dual-port 25GbE network expansion card designed to upgrade QNAP NAS and compatible Windows/Linux systems with ultra-fast and reliable connectivity. Powered by the cutting-edge NVIDIA Mellanox ConnectX-6 Lx SmartNIC controller, this PCIe Gen4 x8 card delivers exceptional bandwidth with up to 25Gbps per SFP28 port (also supports 10Gbps) and supports link aggregation for combined speeds up to 50Gbps.

It’s optimized for modern virtualization and low-latency workloads, providing advanced features such as SR-IOV for allocating up to 512 virtual functions and RoCE (RDMA over Converged Ethernet) for direct memory access across networks, significantly reducing CPU overhead and latency. Forward Error Correction (FEC) modes enhance transmission reliability over longer links or noisy environments.

Additional networking standards supported include VLAN tagging and priority (802.1Q/1P), Energy-Efficient Ethernet (802.3az), ETS (802.1Qaz), auto-negotiation, and link aggregation (802.3ad/802.1AX). The card includes a low-profile bracket pre-installed with full-height and select specialized brackets bundled for flexible installation.

Compatibility covers QNAP QTS and QuTS hero with recommended firmware upgrades, plus Windows 8/10 and Linux distributions such as Ubuntu 18.04/20.04 (driver required). Ideal for NAS users and data centers aiming to future-proof their network infrastructure with PCIe Gen4 connectivity and advanced smart NIC capabilities.

Package Contents: Network expansion card, Quick Installation Guide, three mounting brackets (low-profile, full-height, and specialized). Supported cables and transceivers include QNAP CAB-DAC15M-SFP28, CAB-DAC30M-SFP28, and TRX-25GSFP28-SR optical modules.