I have a Dell XPS 420. Mine shipped with Q6600. I decided to change to an E8500, this machine was available with E8500. When I install the E8500, the power light goes flashes amber and there is no attempt to POST or HDD activity. Is their a firmware change or update that I need to do? Any help is appreciated! Robert
You need to contact DELL for them to let you know if there is a BIOS update required for the motherboard to support this processor.
Keep in mind that the compatibility between the processor and the motherboard is determined by the motherboard manufacturer or in this case by the system manufacturer.