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
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
Hewlett-Packard (HP) 536895-001 - 2.53Ghz 5.86GT/s 8MB Intel Xeon E5540 Quad Core CPU Processor Sale $29.00 Retail $99.00
HP 871809-001 - Intel Xeon E3-1220 V6 Four-Core 64-bit processor - 3.0GHz (Kaby Lake, 8MB Level-3 cache, Intel QuickPath interconnect (QPI) speed 8.0 GT/s, 72 watt thermal design power (TDP), socket FCLGA1151) Retail
HP 641467-001 - Intel Xeon X5672 Four-Core 64-bit processor - 3.2GHz (Westmere-EP, 12MB Level-3 cache, Intel QuickPath Interconnect (QPI) speed 6.4 GT/s, 95 watt Thermal Design Power (TDP), FCLGA 1366 socket) Retail