HP 641604-001 - Intel Xeon X5645 Six-Core 64-bit processor - 2.4GHz (Westmere-EP, 12MB Level-3 cache, Intel QuickPath Interconnect (QPI) speed 5.86 GT/s, 80 watt Thermal Design Power (TDP), FCLGA 1366 socket) Retail
HP 504584-001 - Intel Xeon E5630 Quad-Core 64-bit processor - 2.53GHz (Westmere-EP, 12MB Level-3 cache, Intel QuickPath Interconnect (QPI) speed 5.86 GT/s, 80 watt Thermal Design Power (TDP), FCLGA 1366 socket) Retail
HP 614734-001 - Intel Xeon E5-5540 Four-Core 64-bit processor - 2.66GHz Nehalem-EP, 12MB Level-3 cache, Intel QuickPath interconnect (QPI) speed 5.86 GT/s, 80 watt thermal design power (TDP), socket FCLGA1366) Retail
HP 504583-001 - Intel Xeon X5530 Quad-Core 64-bit processor - 2.40GHz (Nehalem-EP, 8MB Level-3 cache, Intel QuickPath interconnect (QPI) speed 6.4 GT/s, 60 watt thermal design power (TDP), socket FCLGA 1366) Retail
HP 594888-001 - Intel Xeon E5507 Quad-Core 64-bit processor - 2.26GHz (Nehalem-EP, 4MB Level-3 cache, Intel QuickPath Interconnect (QPI) speed 4.8 GT/s, 80 watt Thermal Design Power (TDP), FCLGA 1366 socket) Retail