The TP-Link TL-WN781ND is designed to provide a complete end-to-end wireless performance from the server or server backbone to the switch infrastructure & down through to the desktop with the PCI Express connector.
TL-WN781ND Wireless N PCI Express (x 1) Adapter provides a wider compatibility, fitting with any standard PCI Express slot, x 1, x 2, x 8, or x 16. Compared with standard PCI network cards, it offers increased bandwidth, reliability & more functionality, allowing you to enjoy a fast & advanced connection, such as downloading, making internet call & video streaming.
Features
Up to 150 Mbps wireless transmission rate
Provides PCI Express interface
Advanced secure connection with WPA/WPA2 encryption
Bundled utility enables easy management
Includes: a low profile bracket
Specifications
Interface: PCI Express
Antenna Type: Detachable Omni Directional (RP-SMA)
Antenna Gain: 2d Bi
Frequency: 2.400-2.4835 G Hz
Wireless Standards: IEEE 802.11n, IEEE 802.11g, IEEE 802.11b
Dimensions: 4.8 x 3.1 x 0.8in. (120.8 x 78.5 x 21.5mm)
Warranty: 3 years
Specifications:
http://uk.tp-link.com/products/details/cat-11_TL-WN781ND.htmlspecifications