SMC SMC1255TX-2. Connectivity technology: Wired, Host interface: PCI, Interface: Ethernet. Data transfer rate (max): 100 Mbit/s, Supported data transfer rates: 10, 100 Mbit/s. Cabling technology: 10/100BaseT(X), Networking standards: IEEE 802.3, IEEE 802.3u, IEEE 802.3x. Windows operating systems supported: Windows 2000, Windows XP, Windows Vista, Windows 7. Width: 135 mm, Depth: 121 mm, Height: 22 mm