Xeon E5320 1.86GHz Quad-Core LGA771 ( tray)
1.86GHz 4 Core - 4 Threads - Socket LGA 771 / J - 2-Way SMP - 2 x 4MB L2 Cache - 80W TDP - Intel VT-x Virtualization - Clovertown 65nm - Retail Box w/ Passive Heatsink
Xeon X5675 3.06GHz 6-Core/12-Threads 15MB LGA1366
3.06GHz 6 Core - 12 Threads - 3.46GHz Turbo - Socket LGA 1366 / B - 2-Way SMP - Supports DDR3-1333 Memory - 6 x 256KB L2 Cache - 12MB L3 Cache - 95W TDP - Intel VT-x / VT-d / VT-c Virtualization - Westmere-EP 32nm - OEM/TRAY w/o Heatsink & Fan
Xeon E5-2420 1.9GHz Six-Core (Tray)
1.9GHz 6 Core - 12 Threads - 2.4GHz Turbo - Socket LGA 1356 / B2 - 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-EN 32nm - OEM/TRAY w/o Heatsink & Fan