Does lowering CPU core speed save power?

I have phenom 9850 BE which i downclock to 1ghz(set at bios=x5), ram to 200Mhz. By doing this, did i lowering my electric usage? I used W7 and play game with no performance impact.
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More about does lowering core speed save power
  1. Yes, it would save electricity.
  2. Yes it does. If You lower cpu core voltage it will save even more electricity
  3. Thanks guys! :)
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