GNC-0112 High-speed gigabit network card with PCI Express v1.1 compliant Supports single-lane PCI Express for link transmission speed at up to 2.5Gbps Supports IEEE 802.1P Layer 2 Priority Queuing for improving traffic flow IEEE 802.1Q VLAN allows network segmentation to enhance performance and security IEEE 802.3x Flow Control protects against lost packets for reliable data transmission Auto-sensing on network speed connectivity LED indicator for monitoring link/activity Supports Windows 2000/XP/2003/Vista/7/8 The LevelOne GNC-0112 is a high-performance Gigabit Ethernet adapter with a PCI Express (PCIe) interface that supports PCIe 1.1 standard for full bandwidth capacity up to 2.5Gbps. This adapter supports IEEE 802.3x Flow Control for 1000Mbps half-duplex and 2000Mbps full-duplex dataflow, and an integrated auto-sensing function to ensure it runs at the highest available network speed - from 10Mbps up to 1000Mbps. It also features IEEE 802.1P layer 2 priority queuing and an IEEE 802.1Q VLAN tag for optimized data traffic and enhanced transmission security. The card is fully compatible with Windows 2000/XP/2003/Vista/7 operating systems. The LevelOne GNC-0112 offers the latest technology for maximizing system performance and increasing productivity.