This mini pci express 1s1p serialparallel card turns a mini pcie slot into one rs232 db9 serial port and one parallel port the adapter card features a native pci express single chip design that allows you to take advantage of full pci express capability providing improved speed and reliability while reducing the load applied to the cpu by as much as 48 over conventional serial cards which use a bridge chip design the adapter card features a native pci express single chip design that