works on LGA 775 motherboard Xeon E5420 Processor 2.5GHz 12M 1333Mhz close to Core 2 Quad Q6600 cpu|core 2 quad|2 quadcore 2 quad q6600 - AliExpress
Xeon E5450 Processor 3.0GHz 12M 1333Mhz equal to intel Q9650 works on lga 775 mainboard no need adapter|e5450 processor|xeon e5450intel q9650 - AliExpress
Intel Quad 6600 vs Intel Xeon E5430 by georgelgabriel