PCIe v3.0 (8.0GT/s) (Compatible with 2.0 and 1.1), X4/X8/X16 Lane. Hardware Interface: PCIE x 4. NOT support hot swaping. We stand behind our products. Color: X550-10G-2T(2xRJ45). Compatible with Windows Server 2008/ 2012, Linux, FreeBSD 9 and FreeBSD 10, UEFI 2.1, UEFI 2.3, VMware ESXi 5.1 (Limited Functionality), VMware ESXi 5.5.
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