hp xw4600 80+ q9650 4gb 250gb dvdrw ati v7700 xpdg intel quad core q9650 4gb 250gb ati v7700 512mb vista business 32bit with xppro downgrade processor : intel core 2 quad processor q9650 3.00 ghz, 12m cache, 1333 mhz fsb memory : 4 gb(4 x 1 gb) ddr-2 800 mhz ecc unbuffered memory mem slots : 4 dimm slots chipset : intel x38 express storage : 250gb sata 3gb/s ncq, dvd+/-rw drive storage controller : integrated serial ata 3 gb/s controller with raid (0, 1, 5, 10) capability comm : integrated broadcom 5755 netxtreme gigabit pcie lan graphics : ati firegl v7700 (512 mb) audio : integrated high definition audio ports : front : headphone, microphone, 2 x usb 2.0 rear : 7 x usb 2.0, 1 x ext sata, 1 x serial, 1 x parallel, 2 x ps/2 (keyboard, mouse), 1 x rj-45, audio in, audio out, microphone; 3 usb 2.0 (internal) slots : pci express (pcie) x16 gen 2 graphics, 1 x pcie x8 (x4 electrical) slot 1 x pcie x1 slot, 3 x pci slots bays : external : 3 x 5.25 inch, 1 x 3.5 inch; internal : 2 x 3.5 inch os : windows vista business 32 bit with downgrade to xp pro keyboard : hp standard keyboard (usb); pointing device : scroll mouse power : 475 w wide-ranging, active power factor correction, 80+ efficient dimension(w x d x h) : 170 x 457 x 449 mm; weight : starting from 13.6 kg