2.5GHz Intel Xeon E5420 Quad Core 1333MHz 12MB L2 Cache Socket LGA771 Slbbl Intel Xeon E5420 Quad-Core 2.50GHz 12M Cache 1333MHz CPU Processor LGA 771 SLBBL Intel Xeon E5420 Quad-Core 2.50GHz 12M Cache 1333MHz CPU Processor LGA 771 SLBBL