• 10/100/1000 Mbps tri-speed media access controller (MAC) with wire speed performance at all rates • Support for PCI v2.2, 32/64-bit, 33/66 MHz, and PCI-X v1.0 32/64-bit, 66/133-MHz bus interfaces • 96 KB ultra-deep packet buffer with support for up to 16 MB externally • Support for IEEE 802.3, 802.3u, 802.3z, and 802.3ab standards • MII/GMII and TBI (SerDes style) transceiver interfaces •Advanced CPU offload features include: TCP/UDP/IP checksum offload, TCP segmentation, 9 KB jumbo frame • Dual high-speed CPUs