simatic hmi ipc 577cpci-slot,4 usb (back) + 1 usb (front),ethernet (10/100/1000),15" key display;;core2duo 1.86 ghz,profinet(irt); 1 x 1gbit;2 gb -ram, ddr3;2. mass storage:not equipped;1. mass storage:(operating sytem optional):250 gb hdd sata,win xp prof preinstalled,(only possible w. hdd or ssd);without expansions (sw);ac110/230v power supp. w. mamur