Supports Windows 7/8/2000/XP/Vista/Windows Server 2003/2008/2012; Novell Netware 5.x/6.x; Linux; FreeBSD 7.x or later; DOS; SCO Open Server; UnixWare / OpenUnix 8; Sun Solaris x86; OS Independent Vmware ESX (Does not support VMware ESXi 7.0 or above) PCI Express 2.1. 2.5 GT/s x1 Lane. Compatible with x1, x2,x4, x8, x16 standard and low-profile PCI Express slots.