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Can a Core 2 Quad processor be a direct replacement for a Core 2 Duo, given the same socket arrangement?

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If they have the same socket type (i.e. Socket 775) then a Core 2 Quad should work in place of a Core 2 Duo. At worst it may be a bios upgrade is necessary but other than that it should just work.

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Search your motherboard's site to verify that it will work. Some of the original boards still only will support C2D and not C2Q chips... – JFV May 30 '10 at 16:21
Another thing to remember is that the TDP of the quad core models is often 95W where the dual cores are 65W, which may cause issues with power or heat. – Bert Dec 7 '13 at 19:13

This depends on your motherboard and your BIOS. We need more specifics to give you a good answer.

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Depends on your motherboard. Please give us your motherboard's detailed information. It depends on the chipset also and some motherboards won't even support it with a bios upgrade.

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Most C2Ds and C2Qs are directly replacable, if they're from the same generation (E/Q 6xxx, E/Q9xxx). However, your motherboard may differ and the only way to be certain is to check the manual.

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