burden

my system specs r amd athlon 64 3000+ msi k8mm-v 256 mb 400mhz ram hynix,in which 64 is seprately for graphics 80 gb sata segrate no graphics card is installed. one exhuast fan 1.56w a 300 W psu i want to ask that if i install a extra hdd on a seprate ide connector. 1) will it burden...