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  • TurboBoost does not overclock all cores (effectively). When one core is at full load and the other cores are idle, the CPU will boost the clock frequency. The idle cores might be technically boosted, but then again-- they're idle. As soon as they start doing work, the CPU will drop back to the rated speed. I also believe SpeedStep clocks the CPU down as a whole when all of the cores are idle or under light load-- Any core under full load will cause the entire processor to return to rated speed.
    – Darth Android
    Commented Oct 18, 2012 at 14:16
  • @DarthAndroid can you please confirm the Clock (2594 MHz) shown in the gadget under "CPU Usage" greater than the base frequency 2001MHz (shown on left processor information ) is the only Turbo Boost indication the gadget provides?
    – Mahesha999
    Commented Oct 18, 2012 at 19:11
  • I can't confirm that that is the only indication that the gadget provides (it may display it elsewhere), but TurboBoost and SpeedStep both work by altering the CPU multiplier (you can watch this in realtime with a program called CPU-Z), and the CPU multiplier affects all cores on the CPU.
    – Darth Android
    Commented Oct 18, 2012 at 19:52