does overclocking use more watts?

[diven nuttall]

I was wondering if just raising the clock speed for 2.8 to 3.2 ghz with out raising the voltage would use a significantly more power i.e 10+ watts? and if not would it be the same for a gpu?

 

[Mr5oh]

If you don't raise the voltage it should remain about the same. From my machines, I've measured about a 10-15% increase in power draw when overclocked. (with voltages increased for stability) (10% at idle, 15% under load)

Of course it depends on what your build is, but my old 3570k/GTX570HD build peaked out at about 300 watts, so were only talking ~30 watt increase? My new 4690k/GTX760 is more power efficient and peaks at 249 watts under full load (stock clocks).