The Partner Tech PT-5900 utilizes the fan-less Intel Atom D424 processor running at 1.8Ghz to create a platform with solid performance and very low power consumption. The system supports up to 4GB or DDR2 RAM and comes standard with a 160GB SATA hard drive. With a 15in integrated touch screen, it's the best choice for a flexible terminal that can fit a wide variety of applications. -Intel Atom 1.8Ghz -1GB of DDR2 RAM -160GB Hard Drive, Windows XP Pro with Integrated 3-Track MSR