sentence: shipping with both yellow dog linux 2.2 and os x pre-installed , and in addition to the 1 ghz dual powerpc g4s , the system featured 1gb of pc-133 sdram , an 80gb ide hard drive , apple 's dvd-rw '' superdrive , '' gigabit ethernet , firewire and usb ports , and an ati radeon 7500 dual monitor video card .