The MPEX2S952 2-port Mini PCI Express serial card turns a mini-PCIe slot into two RS232 (DB9) serial ports
- a cost-saving solution for adding legacy serial support for embedded systems that aren't normally compatible. The adapter card features a native PCI Express single chip design, which means that you can take advantage of full PCI Express capability by providing enhanced speed & reliability while reducing the load applied to the CPU by as much as 48% over conventional "bridge chip" serial cards.