CPU

HPE Intel Xeon Quad Core processor L5430 - 2.66GHz (Harpertown, 1,333MHz front side bus, 8MB (4x2MB) Level-2 cache, 50W)

HPE Intel Xeon Quad Core processor L5430 - 2.66GHz (Harpertown, 1,333MHz front side bus, 8MB (4x2MB) Level-2 cache, 50W) - Factory Installed Option (FIO) kit

HPE Intel Core 2 Duo processor E4600 - 2.4GHz (Conroe, 2MB Level-2 cache) - Includes alcohol pad and thermal compound

HPE Intel Xeon Quad Core processor 5482 - 3.2GHz (Harpertown, 1600MHz front side bus, 12MB total Level-2 cache, 150W TDP - Includes thermal grease and alcohol pad

HPE Intel Core2 E6400 processor - 2.13GHz(Conroe, 2MB Level-2 cache, 1066 MegaTransfer per second (MT/s), 65W Thermal Design Power (TDP), socket LGA 775

HPE Intel Xeon W5580 Quad-Core processor - 3.2Ghz (Gainestwon, 8MB Level-3 cache (2MB per core), 130W thermal design power (TDP), socket LGA 1366)