This dual profile PCI Express RS-232 Serial card adds two RS-232 (DB9) Serial Ports to existing systems using a single PCI Express slot while providing optimized performance based on a native single-chip design (Oxford OXPCIe952). Compatible with a broad range of operating systems including Windows 2000/XP/2003/Vista Linux Kernel 2.6.11 and up and MAC OS 10.4 and above the PEX2S952 PCI Express Serial Card also features an optional low profile bracket that allows the card to be installed in virtually any computer case.