HP 466669-L21 - Intel Xeon Dual-Core processor E5205 - 1.86 GHz (Wolfdale DP, 1333 front side bus, 6MB Level-2 cache, 65-watt) - Factory Installed Option (FIO) kit Retail
HP 466656-L21 - Intel Xeon E5430 Quad Core processor - 2.33GHz (Clovertown, 1333MHz front side bus, 12MB total Level-2 cache, LGA771 socket) - Factory Installed Option (FIO) kit Retail
HP 466665-L21 - Intel Xeon E5410 Quad Core processor - 2.33GHz (Clovertown, 1333MHz front side bus, 12MB total Level-2 cache, LGA771 socket) - Factory Installed Option (FIO) kit Retail
HP 570034-001 - Intel Celeron Dual Core processor T1500 - 1.73GHz (512KB Level-2 cache, 533MHz front side bus) Retail
HP 455386-005 - Intel Dual-Core processor T2410 - 2.00GHz (Merom, 533MHz front side bus, 1MB Level-2 cache) Retail