please give some reasons~
(1)
Processor: Intel® Core™2 Duo Processor:E4300
Processor speed: 1.80 GHz
Standard memory: 1024MB DDR2 533MHz
Internal hard disk drive: 320 GB
(2)
AMD Athlon™ 64 3800
1.66 GHz
2GB* Dual-Channel DDR2 SDRAM (667MHz)
320GB* SATA
(3)
Intel® Core™2 Duo processors: E6300-E6600
1.66 GHz
2GB* Dual-Channel DDR2* SDRAM (533MHz)
640GB* (2 drives x 320GB*)