Pretty common problem with the new Phenoms. If your board is more than a couple of months old, it will not have a recent enough BIOS to detect the processor correctly. But you are very lucky, many boards will not even boot with the new Phenoms until the BIOS has been updated. Your Phenom is likely not running at it's potential, and the voltage is very likely not correct, it may be set to high, so you should update your BIOS ASAP.
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