product information : hewlett packard xw4600 q9550 4gb 160gbx2 fx370 dvdrw xpp dg hp xw4600 q9550 4gb 160gbx2 fx370 dvdrw xpp dg 80+ q9550 4gb 160gb+160gb fx370 dvdrw vi processor : intel core 2 quad processor q9550, 2.83 ghz, 12mb l2 cache, 1333 mhz fsb memory : 4gb ddr2 ecc memory; memory slots : 4 dimm slots 4 x 1gb storage : 320gb (160gb+160gb) hard disk drive optical drive : dvdrw chipset : intel x38 express chipset comm : integrated broadcom 5755 netxtreme gigabit pcie lan os : vista business 32bit with xppro install graphics : nvidia quadro fx370 audio : integrated high definition audio with jack retasking capability ports: front: headphone, microphone, 2 usb 2.0 rear : 7 x usb 2.0, 1 standard serial port, 1 x parallel, 2 x ps/2, 1 x external sata 1.5 gb/s, 1 x rj-45, audio in, audio out, microphone; int : 3 x usb 2.0 slots : 7 full length slots: pci express (pcie) x16 gen 2 graphics, 1 x pcie x8 (x4 electrical) slot, 1 x pcie x1 slot, 3 x pci slots power : 475 watts wide-ranging, active power factor correction, 80 plus efficient dimensions (h x w x d) : 449 x 170 x 457 mm;weight : 13.6 kg