Compaq Presario R4125US 15.4" Laptop (AMD Athlon 64 Processor 3500+, 512 MB RAM, 100 GB Hard Drive, DVD+/-R/RW and CD-RW Combo Drive) AMD Athlon 64 Processor 3500+ with PowerNow! Technology (2.2GHz) Up to 2000MHz System Bus 512KB of L2 Cache 512MB of 333MHz DDR SDRAM (expandable to 2GB) ATI RADEON XPRESS 200M IGP graphics with 128MB DDR SDRAM