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Ethernet controller: base on original Intel 82599ES controller, which supports single root I/O virtualization and improve servers stability. Compare to Intel X520-DA2(Intel E10G42BTDA). Support OS:Windows 7/8/10/Visa, Windows Server 2008/2012/2016/2019, Linux, Centos/RHEL 6/7/8, Ubuntu 16/18/19/20, Debian 9/10/11, FreeBSD 10/11/12, Vmware. ESX/ESX/ESX/ES/7, SLSE 11/12,etc. SFP+ PCI-E NIC: 10Gb dual SFP+ ports, apply to 10G SFP+ module/ DAC / AOC. PCI Express 2.0 5.0 G T/s x 8 Lane, compatible with PCIE X8, X16 Slot. ✅Easy to install:Coming with a driver CD to install OS, you also can download it from intel website. Packed with BOTH Low Profile Bracket and Full-height Bracket that support on Standard and Slim computer/server. ✅After-sales Service: Provides 24/7 Customer Service, 30 Days Free-returned, 1 Year Free Warranty and Lifetime Technology Support.