This PCI Express RS232 serial adapter card lets you add four RS232 (DB9) serial ports to your computer through a PCI Express (PCIe) slot The replacement for the PEX4S952LP serial card enables you to interact with serial devices such as printers and modems The 4-port serial PCIe card provides a max baud rate of up to 921.6Kbps and 256-byte FIFO cache with the Asix AX99100 chipset The low profile PCI E serial card is easy to integrate into many environments with support for Windows and Linux