IBMIBM NETXTREME II QUAD PORT NETWORKING ADAPTER_The IBM NETXTREME II QUAD PORT NETWORKING ADAPTER has 4 ports with the form factor being a plug-in card-low profile. The Interface Bust type is PCI Express 2.0 x 4 with PCI specification revision: PCI-E 2.0. The connectivity technology is wired, the caring type is Ethernet 10BASE-T, Ethernet 100base-tx, Ethernet 1000Base-T. The Data link protocol is a fast gigabit Ethernet. The Data transfer rate is 1 GBPS and the network transport protocol is ISCSI with features being TCP/IP Offloading. The products are Grade A system pulls which means they were pulled from a server but they have been tested and work. We offer free same-day ground shipping on orders over $50 within the 48 contiguous states, a one-year warranty, if you have any questions, feel free to chat with our web representative.