product information : hewlett packard pavilion a6730a intel e2220 2gb 320 vista home hp pavilion a6730a intel e2220 2gb 320 vista home intel dual core e2220 2.4ghz 2gb 320gb 7200 dvdrw sm dl ls vista home premium processor : intel pentium dual core processor e2220, 2.4ghz, 1mb l2 cache, 800mhz fsb memory : 2048mb pc2-6400/800mhz ddr2 expandable up to 4gb with discard memory slot: 2 dimm/0 dimm (total/available); chipset : nforce 630i storage : 320 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 keyboard : hp deluxe low profile multimedia keyboard mouse : hp optical, 2-button ps2 scroller mouse