Features: brand new and high quality Better compatibility for intel for Intel I82576EB system chipset. Compliant with PCI-Express basic specification 2.0 (5GTs) and backward for specifications 1.1 and 1.0A. PCI-Express speed 2.5/s full duplex channel. Support 10/100/1000MBPS network automatic configuration. Support exchange/polarity/skew correction, for cross detection and automatic correction. Support wake-up on LAN and remote wake-up. Support Micro-soft NDIS5, NDIS6 checksum offloading (IPv4, IPv6, TCP, UDP) and segmentation tasks, offloading (mass delivery v1 and bulk delivery v2). Support EMAC-393 ECMA ProxZzzy host sleep standard. Support full duplex flow control (IEEE 802.3X). Support 9K byte jumbo frame. Fully for comply with IEEE802.1P, IEEE802.1Q, IEEE802.3 10Base-T, IEEE802.3u 100Base-TX, IEEE802.3ab 1000Base-T standards. for PCI-E X1 and PCI-E X16 standards. Specifications: Chipset:Intel 82576 Ethernet Controller Port number: 4 x RJ-45 Standard:IEEE802.1P, IEEE802.1Q, IEEE802.3 10Base-T, IEEE802.3u 100Base-TX, IEEE802.3ab 1000Base-T standards Data speed:10/100/1000 / Mbps Interface:PCI for express 1X Size:approx. 15.6x6.85x1.6cm/6.14x2.7x0.63in Package Includes: 1PC x Network Card note: At least one available PCI-Express slot on the personal computer. Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.