The Asus PCE-AC55BT B1 PCIe Wi-Fi adapter provides superior dual-band AC1200 Wi-Fi performance for server backbone and switching infrastructure applications, it delivers wide compatibility, fitting any x1, x2, x8, or x16 slot. With 80MHz bandwidth and higher modulation scheme, PCE-AC55BT speeds up to 867Mbps on the 5 GHz band that's 3 times faster than standard 802.11n Wi-Fi , allowing you enjoying faster and more stable connections. Besides, high-speed design and powerful antenna ensures long range wireless coverage.