Add 2 rs 232 serial ports to your full height or low profile computer through a pci express slotr r data transfer rates of up to 460 kbps for peak serial device performancer native single chip single lane pci express offers increased speed and reduced cpu load by up to 48r standard and low profile bracket included ensuring easy installation into almost any systemr r the pex2s952 pci express based serial card turns a pci express slot into 2 rs 232 db9 serial connectionsr r the adapter card i