Xeon E5640 2.66GHz Quad-Core (Tray)
2.66GHz 4-Core - 8 Threads - 2.93GHz Turbo - Socket LGA 1366 / B - 2-Way SMP - Supports DDR3-1066 Memory - 4 x 256KB L2 Cache - 12MB L3 Cache - 80W TDP - Intel VT-x / VT-d / VT-c Virtualization - Westmere-EP 32nm - OEM/TRAY w/o Heatsink & Fan
Xeon E5-2609 v4 1.7GHz 8-Core/8T S2011-R3 2way 85W
1.7GHz 8-Core - 8 Threads - Socket LGA 2011-v3 / R3 - 2-Way SMP - Supports DDR4-1866 Memory - 8 x 256KB L2 Cache - 20MB L3 Cache - 85W TDP - Intel VT-x / VT-d Virtualization - Broadwell-EP 14nm - Retail Box w/o Heatsink & Fan
Xeon E5-2640 2.5GHz Six-Core (Tray)
2.5GHz 6-Core - 12 Threads - 3.0GHz Turbo - Socket LGA 2011 / R - 2-Way SMP - Supports DDR3-1333 Memory - 6 x 256KB L2 Cache - 15MB L3 Cache - 95W TDP - Intel VT-x / VT-d Virtualization - Sandy Bridge-EP 32nm - OEM/TRAY w/o Heatsink & Fan