1The E1G42ET uses a dual copper Gigabit Ethernet port with two Gigabit ports on the PCI Express NIC. 2Intel 82576 E142ET integrates the functions of MAC and PHY into one chip to maximize data transmission. 3The best duplex mode reduces network congestion and greatly increases network bandwidth. 4This card can be used for: diskless servers, data servers, web servers, and other servers. Extremely stable when working for long hours. 5 It can also be used for: VM virtual machine, full version of ESXI series, virtual VLAN, set load balancing, flow control, ISCSI and other virtual applications.Features:1. The E1G42ET uses a dual copper Gigabit Ethernet port with two Gigabit ports on the PCI Express NIC.2. Intel 82576 E142ET integrates the functions of MAC and PHY into one chip to maximize data transmission.3. The best duplex mode reduces network congestion and greatly increases network bandwidth.4. This card can be used for: diskless servers, data servers, web servers, and other servers. Extremely stable when working for long hours.5. It can also be used for: VM virtual machine, full version of ESXI series, virtual VLAN, set load balancing, flow control, ISCSI and other virtual applications.Specifications:Product Model: Server NIC.Chipset: 82576 for Intel.Support PCMCIA Standard: No.System Interface Type; PCI-E2.0 (2.5GT/s).Support full-duplex: Yes.Operating system; Microsoft Windows Server 2003, Enterprise,Detacenter(32-and 64-bit)Windows2000Red Hat Linux 24x or later(32-and 64-bit)FreeBSD 4x or laterLED Indicator : 2 LED Lights.Port Type: 2 RJ45.Transmission Speed: 10/100/1000 Mbps.Transmission medium Type : UTPWeb standards : IEE 802.1p, IEE 802.1Q, IEE 802.3ab, IEE 802.3.1.Working Temperature: 0 - 50.Operating Humidity: 85%.Storage Temperature:-20-65.Package List:1 * Network Card1 * Drive Disc1 * Baffle