PCIe Dual Port Gigabit Ethernet Card - Realtek Single-lane (or x1) PCI Express throughput supports rate of 2.5Gbps Fully Compliant with 10/100/1000M IEEE 802.3 specification Jumbo Frame support and full duplex mode that doubles the network connections speed Designed to meet PCI Express Specification Revision 2.1 Fully Compliant with 10/100/1000M IEEE 802.3 specification