Intel Pro/1000 Xt Gigabitcopper Cat5 Server Adapter Pci-x Interface: PCI 2.2/PCI-X 1.0, 32- or 64-bit, 33/66/100/133 MHz. Chipset Used: intel FW82544EI. Buffer Memory: 64 KB. Network Architecture: 10BASE-T, 100BASE-TX, 1000BASE-T. Number of Ports: 1 x RJ45.