AMD Opteron 4122 4-Core Lisbon 2.2GHz 4 x 512KB L2 Cache 6MB L3 Cache Socket C32 50W Processor OS4122WLU4DGNWOF - Retail Multi-Core: 4-core Operating Frequency: 2.2GHz Socket: C32 L2 Cache: 4 x 512KB Wattage: 75W