4 Port RJ45 Gigabit Ethernet Card 10/100/1000/25000 Mbps PCIE Network Interface Card for Gaming Office Black for Windows Item Type: 4 Port RJ45 Gigabit Ethernet Card Material: Aluminum Alloy Color: Black Chip: for ASM1806, for Inter I226 chip Interface: 4 x 10/100/1000/2500Mbps RJ45 Network Interface, Support Network Adaption Network Standard: IEEE 802.3bz (2.5GBASE-T) IEEE 8023ab 1000BASE-T Gigabit Ethernet IEEE802.3u 100BASE-TX Fast Ethernet IEEE 802.3i 10BASE-T Network Standard IEEE 802.3x Full Duplex and Flows Control lEEE 802.3ad Link Aggregation for Parallel Links IEEE802.1Q VLAN, IEEE 1588 IEEE 802.3az Energy Efficient Ethernet Compatible Slots: PCIE 16X/8X/4X Network Environment: 10/100/1G/2.5G Compatible System: Support for Windows 7/8/10/11, for OS X Mainstream System Scope of Application: Desktop