GHz, 2MB L2 Cache, 4000 MHz System Bus); 4GB PC3-8500 DDR3 SDRAM memory; 500GB 7200RPM Serial ATA hard drive; Slot-load SuperMulti DVD Burner; Touch-enabled

(2.3 GHz, 512 KB L2 Cache, 1600 MHz System Bus); 2 GB PC2-6400 DDR2 SDRAM memory (1×2048 for ultimate performance) (expandable to 4GB); 250GB

(2.7 GHz, 1 MB L2 Cache, 4000 MHZ System Bus); 3GB PC2-6400 DDR2 SDRAM memory (1x2048MB and 1x1024MB); 500GB (7200RPM) Serial ATA hard drive;

Core2 Duo Processor T6500 (2.1 GHZ, 2 MB L2 Cache, 800 MHz System Bus); 4GB PC3-8500 DDR3 SDRAM memory (2×2048); 750GB 7200RPM Serial ATA

GHz, 1 MB L2 Cache, 2000 MHz System Bus); 2GB PC2-6400 DDR2 SDRAM memory (2x1024MB ultimate performance); 320GB (7200RPM) Serial ATA hard drive; Slim