Intel 845G chipset with 266 MHz Double Data Rate (DDR) memory 256MB installed(2slots one open)Intel Pentium 4/2.53GHz 512K cache 533MHz FSB4slotx5bay TowerUp to 1.0 GB of DDR system memory support Integrated video graphics support Intel Extreme Graphics(up to 32MB with 128mb main memory-64MB with 256MB+)48X CDROMUltra ATA 100 40GB 7200RPMIBM Embedded Security Subsystem (Multi-factor authentication/local file encryption/enhances VPN security)Windows XP Pro