The pcie serial card features a low profile mounting bracket that39s designed specifically for low profilesmall form factor computer cases compatible with a broad range of operating systems including windows 2000xp2003vista and linux kernel 2611 and up the pex1s952lp pci express serial card is backed by startechcom39s lifetime warranty and free lifetime technical support this low profile pci express serial card adds an rs232 db9 serial port to a computer through an available pci express s