Add 4 rs232 serial ports to any pc using a single pci express expansion slotr r lower cpu load of native single chip single lane pci express design ensures optimal system performance up to 48 less cpu loadr includes both standard and low profilehalf height brackets which makes this the perfect card for any application including small form factor embedded applicationsr breakout cable design means that only one expansion slot is needed to add 4 additional serial ports to any systemr r the