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 395806-001 - Intel Xeon Single-Core 64-bit processor - 3.80GHz (Irwindale, 2MB Level-2 cache,800 MHz front side bus (FSB), 110 watt thermal design power (TDP), socket PPGA604 ) Retail
HP 383039-001 - Intel Xeon 3.8 Single Core processor - 3.80GHz (Irwindale, 2MB Level-2 cache, 110W Thermal Design Power (TDP), socket 604) Retail
HP 875710-001 - Intel Xeon Bronze 3106 eight-Core 64-bit processor - 1.70GHz (Skylake), 11MB Level-3 cache, 85 watt thermal design power (TDP), socket FCLGA3647 Retail
HP 875725-001 - Intel Xeon-Gold 6144 eight cores, processor - 3.50GHz (Skylake), 24.75MB Level-3 cache, 150 watt thermal design power (TDP), socket FCLGA3647 Retail