Add 2 rs 232 serial ports to your standard or small form factor computer through a pci express expansion slotr r data transfer rates of up to 460 kbps for peak serial device performancer native single chip single lane pci express offers increased performance for up to 48 less cpu loadr pre configured for low profile systems but includes a full profile bracket for versatilityr r the pex2s952lp low profilehalf height pci express serial card turns a pci express slot into two rs232 db9 serial