BenQ Joybook P51E.G16, AMD Mobile Sempron, 1.8 GHz, 15.4", 1280 x 800 pixels, 0.5 GB, 80 GB BenQ Joybook P51E.G16. Processor family: AMD Mobile Sempron, Processor frequency: 1.8 GHz. Display diagonal: 15.4", Display resolution: 1280 x 800 pixels. Internal memory: 0.5 GB, Internal memory type: DDR2-SDRAM. Total storage capacity: 80 GB, Optical drive type: DVD±RW. Discrete graphics card model: NVIDIA GeForce Go 6100. Operating system installed: Windows XP Home Edition. Weight: 5.29 lbs (2.4 kg)