QNAP QXG-2G2T-I225 Dual-Port 2.5GbE Network Expansion Card
Overview
The QXG-2G2T-I225 is a dual-port 2.5 GbE network expansion card built on the Intel I225 controller, designed to add multi-gigabit connectivity to PCIe-equipped QNAP NAS units. If your current NAS is bottlenecked at 1GbE — a real constraint when multiple clients are pulling surveillance footage or large file transfers simultaneously — this card steps you up to 2.5Gbps per port without requiring a full 10GbE infrastructure upgrade. The QXG-2G2T-I225 supports four-speed auto-negotiation (2.5Gbps / 1Gbps / 100Mbps), so it drops cleanly into existing switched networks that aren't yet 2.5G-capable. It fits a low-profile slot (PCB length 78.8 mm), making it compatible with compact NAS chassis that cannot accept full-height cards.
Compatibility
This card installs into QNAP NAS models with an available PCIe 3.0 x4 slot and a compatible QTS or QuTS hero firmware version. Target enclosures include QNAP TVS-h series (TVS-h877AX, TVS-h1288X), TS-x73A series, and other tower or rackmount units that expose a PCIe expansion bay. The card is not compatible with NAS units that lack a PCIe slot or those restricted to PCIe 2.0 x1 slots. Verify your specific model's expansion slot specification in the QNAP compatibility list before ordering — slot generation and lane count both matter. The dual-port design allows link aggregation (LACP 802.3ad) or failover configurations when both ports are active, depending on your switch and QTS network settings. For the broader QNAP NAS and networking catalog, including higher-speed 10GbE expansion options, review the full family lineup. Buyers evaluating network switches for a 2.5GbE upgrade should confirm switch-side 2.5GBASE-T port availability before deploying this card.
Installation Notes
The card ships with a low-profile bracket installed; confirm your chassis bracket height before seating. PCB length is 78.8 mm — measure available clearance in tight NAS bays. Power is drawn entirely from the PCIe slot; no auxiliary power connector is required. For NAS units used in network video recorder configurations, adding this card can meaningfully increase sustained write throughput to storage when ingesting streams from multiple cameras. Consult your NAS model's PCIe slot power delivery rating to confirm it meets the card's draw.
