The QNAP QXG-2G2T-I225 is a dual-port 2.5GbE PCIe network expansion card that typically costs around $99.00. [1, 2]Key Specifications

• Ports: Two RJ-45 2.5GbE Ethernet ports [1, 2]
• Controller: Intel Ethernet Controller I225-LM [1]
• Interface: PCIe Gen2 x2 [1]
• Speeds Supported: 2.5 Gbps, 1 Gbps, 100 Mbps, 10 Mbps [1]
• Cabling: Cat 5-class (or better) cables [1, 2]
• Included Brackets: Low-profile (pre-installed), full-height, and specialized QNAP NAS bracket [1]

Compatibility & Features

• Operating Systems: QTS/QuTS hero, Windows 10 (1809 or later), Linux Stable Kernel 4.20/5.x, and Windows Server 2019. [1]
• Supported Devices: Compatible with select QNAP NAS models with a free PCIe slot and general desktop PCs or servers. [1, 2]
• Advanced Functions: Supports PXE, 9k jumbo frames, teaming, VLANs, and Wake-On-LAN (Note: only the first port near the gold fingers supports Wake-On-LAN, and it is not supported natively under QTS). [1, 2]
• User response: A user on Netgate Forum noted potential connectivity hiccups requiring adapter reboots after changing link states or cable disconnects, possibly related to driver power settings. [1]