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[Chris_R.]

Did you install any other components? Perhaps if your board supports it, do a BIOS flash back or clear the CMOS. Undo what ever settings you set.

 

If that doesn't work, put the old cpu back in. If that works, you may have a defective CPU.

 

Edit* Make sure {obviously} that your board supports the CPU.

Edited September 21, 2015 by Chris_R.

[8-Bit Ninja]

check the Ram, Cpu and check the pins on the mobo, do they all look straight

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