This multiport PCI Express RS232 serial adapter card lets you add two RS232 (DB9) serial ports to your computer through a PCI Express (PCIe) slot as if they were native serial ports The dual port PCIe serial card enables you to interact with serial devices such as card readers printers PIN pads and modems at speeds of up to 921 6Kbps Maximum Compatibility With broad OS support including for Windows and Linux this 2 port PCI E serial card is easy to integrate into mixed environments The card comes pre-configured with a full-profile bracket and includes optional low-profile brackets so installation is easy regardless of the case form factor This card is a direct replacement for PEX2S952 Experience Optimal Technology This PCIe to serial adapter is industry standard 16950 UART compatible supports max baud rate of up-to 921 6Kbps provides 5/12V power output on Pin 9 when external power is connected has a 256-byte depth FIFO cache per transmitter and receiver supports 9 8 7 6 5 data bits (one per port) features an Asix AX99100 chipset and is base PCI Express 1 1 compliant Reliability PEX2S953 is backed by a StarTech lifetime and free lifetime technical support