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What's Turbo Boost?

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June 27, 2012 6:36:08 AM

On the processor, when it tells you the clock speed, then the Turbo Boost speed, what does the turbo boost do, and how do you activate it?

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a c 283 à CPUs
June 27, 2012 6:43:47 AM
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Turbo is active by default, and it's boosts the speed depending on the number of cores in use (also takes temp limits into consideration). For example, a 2500K is 3.3Ghz base speed and 3.7 with one core Turbo, 3.6 with two, 3.5 with three and 3.4 with all 4 in use.
June 27, 2012 6:45:34 AM

Oh ok. So it activates by itself? And what if you OC it? Does it still Turbo Boost?
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a b à CPUs
June 27, 2012 6:47:56 AM

ninja0 said:
On the processor, when it tells you the clock speed, then the Turbo Boost speed, what does the turbo boost do, and how do you activate it?


If the chip is not drawing it max rated power while doing something, then the chip can temporarily clock itself higher than its actual stock clock rating to get more performance....basically its like SpeedStep in reverse gear :) 

Yes, it activates by itself if enabled in the BIOS :) 
a c 283 à CPUs
June 27, 2012 6:48:05 AM

ninja0 said:
Oh ok. So it activates by itself? And what if you OC it? Does it still Turbo Boost?


I suppose "activates by itself" is a good description. If you OC, especially with all cores at the same speed, it effectively disables Turbo's true function (even if Turbo itself isn't truly disabled). That's why I just OC with the main multi.
a c 283 à CPUs
June 27, 2012 6:49:50 AM

$hawn said:
If the chip is not drawing it max rated power while doing something, then the chip can temporarily clock itself higher than its actual stock clock rating to get more performance....basically its like SpeedStep in reverse gear :) 


That's true, but you'll VERY rarely ever see the base speed. It'll either be lower than that with SpeedStep, or higher because of Turbo.
June 27, 2012 6:52:08 AM

Best answer selected by ninja0.
June 27, 2012 6:52:20 AM

Thanks guys for your help! :D 
a c 283 à CPUs
June 27, 2012 6:52:46 AM

You're welcome. :) 
!