Processor & Cache Memory AMD Phenom II Quad-Core Processor P920, 1.6 GHz AMD Phenom II Triple-Core Processor N830, 2.1 GHz AMD Turion NeoX2 Dual-Core Processor P520, 2.3 GHz AMD Athlon II Dual-Core processor P320, 2.1 GHz AMD V Series processor V140/V120, 2.3/2.2 GHz Chipset AMD RX881M + SB820M Main Memory DDR3 1066 MHz SDRAM, 2 x SODIMM socket for expansion up to 8GB SDRAM Display 14" 16:9 HD (1366x768) LED backlit Video Graphics & Memory ATI Mobility Radeon HD 5470 512MB VRAM Hard Drive 640GB,5400rpm 500GB,5400rpm;7200rpm 320GB,5400rpm;7200rpm 250GB,5400rpm Optical Drive DVD Super Multi Double Layer Card Reader SD ,MMC card reader Video Camera 0.3 Mega Pixel web camera Fax/Modem/LAN/WLAN Integrated 802.11 b/g/n Built-in Bluetooth V2.1+EDR (optional) 10/100/1000 Base T LED Status Indicator Power-on/Suspend Battery Charging/full/low Storage device access Capital Lock Wireless on status indicator Interface 1 x VGA port/Mini D-sub 15-pin for external monitor 3 x USB 2.0 ports 1 x RJ45 LAN Jack for LAN insert 1 x HDMI 1x Headphone-out & Audio-in Combo Jack Audio Built-in speaker and microphone Altec Lansing speakers SRS Premium Sound Battery Pack & Life 6 cells: 4400 mAh 47 Whrs AC Adapter Output: 19 V DC, 4.74 A, 90W Input: 100-240 V AC, 50/60 Hz universal Dimension & Weight 34.9 x 23.8 x 3.50~3.74 cm (W x D x H) 2.20 kg (with 6 cell battery)