product information : hewlett packard dx2810 mt q9400 4gb 500gb dvdrw xppro dg+19"lcd hp dx2810 mt q9400 4gb 500gb dvdrw xppro dg+19"lcd microtower ati 2400xt xppro downgrade with vista business license double up promo plus hp l1910 19" xppro installed proc : intel core 2 quad q9400, 2.66 ghz, 6 mb l2 cache, 1333 mhz fsb memory : 4 gb (2 x 2 gb) ddr2 synch dram pc2-6400 (800 mhz) memory memory slot : 4 dimms; chipset : intel g45 express chipset storage : 500 gb 3.0gb/s serial ata hard drive(7200 rpm), dvd-rw drive comm : realtek 8111c-vb-gr gbe ethernet controller graphics : ati radeon hd 2400xt 256mb dual head graphics adapter audio : realtek alc662 high definition audio codec ports : 8 x usb (2 front, 6 rear), 3 int ports on system board(1 for front ports, one for media card reader, one for 3po device), 1 x serial, 2 x ps/2 (mouse,keyboard), front headphone and microphone jacks, rj-45, 1 x parallel, rear audio jacks, vga slots : 2 x full-height pci 2.3, 1 x full-height pci express x1, 1 x full-height pci express x16 (gen 2graphics slot) bays : int : 2 x 3.5 inch; ext : 2 x 5.25 inch, 1 x 3.5 inch os : xp prof downgrade with vista business both media in box dimension(h x w x d) : 385 x 185 x 416 mm; weight : 8.34 kg cpx1910 hp l1910 19" lcd monito view size : 19.0" (diagonal); panel type : active matrix tft native res : 1280 x 1024 at 60 hz (rec) (sxga) pixel pitch : 0.294 mm brightness : 300 cd/m2; contrast ratio: 800:1; response time : 5 ms viewing angle : 160 deg (h/v); i/p signal : 15 pin d-sub(analogue vga)