Compaq Presario 2575US Laptop (2.66-GHz Pentium 4, 512 MB RAM, 80 GB Hard Drive, DVD/CD-RW Drive) Measuring 12.9 by 10.72 by 1.79 inches and weighing 7.5 pounds Presario 2575us is comfortably portable. Compaq has loaded the unit with a fast 2.66 GHz Intel Pentium 4 processor 512 MB of DDR SDRAM memory (upgradeable to 1024 MB) 120W AC adapter / 12-cell Lithium-Ion battery