Xeon E7-4880 v2 2.5GHz 15-Core (Tray)
2.5GHz 15-Core - 30 Threads - 3.1GHz Turbo - Socket LGA 2011-1 / R2 - 4-Way SMP - Supports DDR3-1600 Memory - 15 x 256KB L2 Cache - 37.5MB L3 Cache - 130W TDP - Intel VT-x / VT-d / VT-c Virtualization - Ivy Bridge-EX 22nm - OEM/TRAY w/o Heatsink & Fan - No Mfg. Warranty
Xeon E5-4655 v4 2.5GHz Eight-Core (Tray)
2.5GHz 8-Core - 16 Threads - 3.2GHz Turbo - Socket LGA 2011-v3 / R3 - 4-Way SMP - Supports DDR4-2133 Memory - 8 x 256KB L2 Cache - 30MB L3 Cache - 135W TDP - Intel VT-x / VT-d Virtualization - Broadwell-EP 14nm - OEM/TRAY w/o Heatsink & Fan - No Mfg. Warranty