The PEX1S1P952 1S1P native PCI Express parallel/serial combo card with 16950 UART turns a PCI Express slot into 1 RS232 (DB9) serial, & 1 parallel port. The combo card features a native PCI Express single chip design that means that you can take advantage of full PCI Express capability, providing enhanced speed & reliability while reducing the load applied to the CPU by as much as 48% over conventional serial cards that use a bridge chip design. This 1-port serial/1-port parallel card offers compatibility with a broad range of operating systems, for easy integration into mixed environments.