QNAP QXG-5G4T-111C Quad-Port 5GbE PCIe Network Expansion Cardupgrades network connection speed by installing into an available PCIe 3.0 x4 slot on your computer NAS or other compatible device. The QXG-5G4T-111C includes four 5G Ethernet ports that are backward compatible with 2.5G Gigabit and 100 Mb/s speeds and work with Cat 5E-class cables. The adapter comes with a low-profile bracket pre-installed and includes a full-height bracket in addition to one that is specially designed for select QNAP NAS devices.