product information : hewlett packard pavilion a6740a intel e7400 2gb 500 vista home hp pavilion a6740a intel e7400 2gb 500 vista home intel core 2 duo e7400 2.8ghz 2gb 500gb 7200 dvdrw sm dl ls vista home premium processor : intel core 2 duo proc e7400, 2.8ghz, 3mb l2 cache, 1066mhzfsb memory : 2048mb pc2-6400/800mhz ddr2 expandable up to 4gb with discard memory slot: 2 dimm/0 dimm (total/available); chipset : nforce 630i storage : 500 gb serial ata hard drives at 7200rpm optical drive : supermulti sata drive with light scribe tech, dl (8.5gb) comm : intg 10/100 baset nw i/face, wireless 802.11 b/g lan os : microsoft windows vista home premium drive bays : total - external - 2 x 5.25", 2 x 3.5"; internal - 2 x 3.5" available - external - 1 x 5.25"; internal - 1 x 3.5"; external - 1 x optional hp pocket media drive graphics : ati radeon hd 3450 pci-express graphics card with dvi 256mb dedicated graphics memory audio : intg intel high definition audio, 7.1 surround sound ready ports : 1 x 1394, 6 x usb 2.0(2 front, 4 rear), 2 x ps/2, line-in, line-out, mic-in, side spkr l/r, rear spkr l/r, central/subwoofer, spdif-in, spdif-out, 10/100 lan, microphone, headphone card reader : 15-in-1 digital media reader supporting: cf i, cf ii, microdrive, sm (smartmedia), mmc, sd, memory stick, memory stick pro, extreme digital card, minisd, memory stick duo, memory stick duo pro, rsmmc, mmc+, mmc mobile slots : total - 1 x pci express (x16), 2 x pci express (x1), 1 x pci available - 1 x pci express (x1), 1 x pci keyboard : hp deluxe low profile multimedia keyboard mouse : hp optical, 2-button ps2 scroller mouse