1, D525 1.8GHz DDR3 1066/1333MHz; 2, Built-in 4GB RAM, 320GB HDD; 3, GPS, wifi is Optional ... .8GHz DDR3 1066/1333MHz 4GB RAM, 320GB HDD2, Standard USB 2.0 and SD Interface in ... 525Memory1x DDR3 1066/1333MHz 200PIN SODIMM 4GB RAM (already integrated)GraphicsIntel Graphics Media Accelerator 3150 ... ,Compatible DirectX 9.0HDD1x 2.5" SATA HDD 320GB (already integrated)AMP50W ...