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Original Intel Xeon E5420 processor CPU 2.50GHz /12MB/1333/LGA775/Quad-Core/equal to Q6600 Q9300 works on LGA775 no need adapter - AliExpress
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Intel EU80574KJ060N - 2.50Ghz 1333Mhz 12MB Cache LGA771 Intel Xeon E5420 Quad-Core CPU Processor - CPU Medics
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