hp xw4600 80+ e8400 2gb 160gb dvdrw fx570 xpp dg intel core 2 duo e8400 2gb 160gb fx570 dvdrw vista business 32bit with xppro downgrade processor : intel core2 duo processor e8400, 3.00 ghz, 6 mb l2 cache, 1333 mhz fsb memory : 2 gb ddr2 memory; memory slot : 4 dimm slots storage : 160gb hard drive optical drive : dvdrw chipset : intel x38 express chipset drive controllers : intg sata controller (ich10r) 3 gb/s with raid 0, 1, 5 and 10 capability drive bays : 3 x external 5.25-inch bays, 2 x internal 3.5-inch bays, 1 x external 3.5-inch bay comm : integrated broadcom 5755 netxtreme gigabit pcie os : genuine windows vista business 32-bit with downgrade to windows xp professional 32-bit graphics : nvidia quadro fx 570 audio : intg high definition audio with jack retasking capability ports : 12 x usb 2.0 (2 x front, 7 x rear, 3 x internal), 1 x headphone, 1 x microphone, 1 x parallel, 1 x serial port, 2 x ps/2, 1 x external sata 1.5 gb/s, 1 x rj-45, audio in, audio out, microphone 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 : 475w; active power factor correction; 80 plus efficient ships with dvi-vga adapter/s