works on LGA 775 mainboard no need adapter xeon E5420 Processor 2.5GHz/12M/1333Mhz close to LGA775 Core 2 Quad Q6600 cpu - AliExpress
Amazon.com: E5450 E5450 Intel Xeon SLANQ Or SLBBM Quad-Core 3.0GHz 12MB 1333MHz Socket 775 Works On LGA 775 Mainboard No Need Adapter : Everything Else