Technology Explained

How Intel Turbo Boost Works

Matt Smith 23-05-2010

Normally, the computer processor in your laptop or desktop has a standard clock speed which partially determines how quickly it performs. While the processor might lower its clock speed at times in order to conserve power, the clock speed which is stated when you buy the computer is the fastest clock speed you’ll receive unless you decide to overclock.


If you do decide to overclock, or you ever speak to someone who regularly overclocks processors, you’ll discover a dirty little secret – the clock speed a processor ships at is typically much lower than the actual maximum clock speed which the processor could achieve.

The extra headroom isn’t used only because the manufacturer (Intel or AMD) needs to plan for worst case scenarios, which means they need a processor which is sold as a 3GHz processor to work at that speed even if someone decides to use a winter jacket as a PC case.

At least, that is how processors used to be. However, Intel’s new Core i5 and Core i7 processors have a feature called Turbo Boost which has the ability to dynamically scale up the clock speed of a processor depending on the thermal headroom available.

How Intel Turbo Boost Works

Intel Turbo Boost monitors the current usage of a Core i5 or i7 processor to determine how close the processor is to the maximum thermal design power, or TDP. The TDP is the maximum amount of power the processor is supposed to use. If the Core i5 or i7 processor sees that it is operating well within limits, Turbo Boost kicks in.

intel turbo boost


Turbo Boost is a dynamic feature. There is no set-in-stone speed which the Core i5 or i7 processor will reach when in Turbo Boost. Turbo Boost operates in 133Mhz increments and will scale up until it either reaches the maximum Turbo Boost allowed (which is determined by the model of processor) or the processor comes close to its maximum TDP. For example, the Core i5 750 has a base clock speed of 2.66GHz but has a maximum Turbo Boost speed of 3.2GHz.

However, Intel still advertises these processors by their base clock speed. This is because Intel does not guarantee that a processor will ever hit its maximum Turbo Boost speed. I have yet to hear of an Intel processor which can’t hit its maximum Turbo Boost speed, but hitting the maximum Turbo Boost is dependent on workload – it won’t happen all of the time.

Why Turbo Boost Rocks

Despite Turbo Boost’s lack of predictability, it is still an excellent feature. It provides a solution to the problem of compromising between dual and quad core processors.

Before Turbo Boost the choice of purchasing a dual core or quad core processor was a compromise. Dual core processors were clocked faster than quad core processors simply because having more cores increases power consumption and heat generation. Some programs, like games, favored dual core processors, while other programs, like 3D rendering software, favored quad cores. If you used both types of applications you had to make a choice about which was most important to you. You couldn’t receive maximum performance in both from a single processor.


Turbo Boost gets rid of this compromise. If you use the Core i5 750 in a 3D rendering application it will probably only operate at its base clock speed because all four cores will be used. However, if you use the Core i5 750 with a game which only needs two cores – presto! – the third and fourth cores go into a low power state and the two cores you’re actually using are running at a clock speed as fast as what you’d expect from a standard dual core processor.

The Future of Intel Turbo Boost (and AMD’s Response)

Turbo Boost is a great feature, and it is part of the reason why Intel’s latest processors are often superior to those from AMD. However, there is still more potential to be tapped. By the end of 2010 Intel will have released ultra-low voltage Core i5 and i7 processors for laptops. These processors will use Turbo Boost as a way of improving battery life.

For example, Intel will be releasing a processor called the Core i7 620UM. This processor has a base clock speed of only 1.06GHz. However, it has a maximum Turbo Boost of 2.133 GHz. What we will end up with is a processor which will run at only the base clock when on battery but can double its speed when plugged in.

intel turbo boost


Intel’s success with Turbo Boost has not gone unnoticed by AMD, however. With the release of the six-core AMD processors, such as the Phenom II X6 1090T, AMD has introduced a similar feature called Turbo Core. Turbo Core isn’t as advanced as Intel’s Turbo Boost, but it is a clear sign of the direction processors will be taking in the future.

It appears the days of set-in-stone processor clock speeds are over. The future will be about changing a processor’s performance on the fly to meet the demands of the user.

Did this article help you understand more about Turbo Boost and why you need it? Still not sure about something? Go ahead and get it answered in the comments.

Also learn about Intel Optane Memory Is Intel Optane Memory Cheap DDR3 RAM? Wondering what Intel's Optane memory is all about? Is it cheap RAM, or something more? Here's what you need to know. Read More :

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  1. Simon
    April 12, 2018 at 2:48 am

    Nice article

  2. Nihal Dewangan
    May 27, 2017 at 7:42 am

    Nicely explained

  3. Nihal Dewangan
    May 27, 2017 at 7:41 am

    Nicely explained....

  4. Raja Bhattacharya
    April 8, 2017 at 7:18 pm

    Does Turbo Boost occur with H270 boards. I do not want to overclock otherwise.

  5. Gavin Brown
    March 2, 2017 at 9:53 pm

    in which generation intel start manufacture turbo boots in i5 and i7 processor

    • QuanLEEE
      October 9, 2017 at 2:59 pm

      at least at 2nd i5 gen

    • Achmed Islamic Hernawan
      January 3, 2018 at 10:24 pm

      I have first gen of intel core i5 on my laptop. and it does have a turbo boost feature.

  6. Gavin Brown
    March 2, 2017 at 9:51 pm

    the think i need to understand at what generation intel manufacture turbo speed in i5 and i7 processor

  7. Alan
    February 20, 2017 at 1:12 am

    thank for the clear and concise explanation

  8. Alison
    November 24, 2016 at 11:48 am

    I am looking at a Dell Inspiron (refurbished) with 1.8GHZ up to 3.2GHz via Turbo Boost. Have also considered a refurbished MacBook Pro with 2.5GHz up to 3.1GHz Turbo Boost. Would there be a significant difference in the processing speed of the MacBook over the Dell? Any advise would be welcome as I am not hugely knowledgeable on computers.

  9. Todd
    November 14, 2016 at 6:18 pm

    Thanks. Learned a lot.

  10. Senthil
    August 9, 2016 at 8:46 am

    thanks a lot sir

  11. Adrian
    February 17, 2016 at 7:48 am

    Oh good!

  12. Nate
    November 28, 2015 at 10:12 am

    I have a dual core i7 processor with a base speed of 2.0ghz and a turbo boost speed of 3.1ghz, so if I want to play a game that requires 3.0ghz, what happens? Does it activate turbo boost?

    • Roye
      December 4, 2015 at 9:05 pm

      ye it does

      • TerraClaw
        May 1, 2016 at 5:13 pm

        i have this situation and it doesn't work

  13. Shubham Pandey
    June 1, 2015 at 10:10 am

    I Love This Website Yr...........

  14. ploddit
    April 29, 2015 at 10:22 am

    find out CPU type in system information and do a search on it.

  15. sifan
    April 17, 2015 at 8:05 am

    How i know whether my computer has turbo boost technology?

  16. Rahul Singh
    March 24, 2015 at 2:56 pm

    great article I have a question though I am planning to buy a new macbook pro .. I was using a windows laptop core i7 don't remember the clock speed bought in mid 2013 .. I know it totally depends on the requirements of an individual but i need some insights on whihc one of the three should I go for:
    2.7GHz Dual-core Intel Core i5, Turbo Boost up to 3.1GHz

    2.9GHz Dual-core Intel Core i5, Turbo Boost up to 3.3GHz [Add $100.00]

    3.1GHz Dual-core Intel Core i7, Turbo Boost up to 3.4GHz [Add $200.00]

    do consider the prices as well is it worth or not .
    I am a software developer in I use jvm for scala and java and mongodb also a remote desktop if I am working from home ... but mostly I will need for my home use which will have a google chrome an eclipse(IDE) some instance of mongodb running and ofcourse the jvm .. that is pretty much it .... Please suggest which would do the job also considering the money aspect

    • Anonymous
      October 25, 2015 at 11:39 am

      Who knows if you will see this you likely have already decided. but, the second option the 2.9 is your best bet. it's base is better than the first options base also it can turbo to higher speeds. it's turbo speed is higher than the third options base and nearly the same when in turbo.

  17. Birkenstock
    May 26, 2010 at 11:31 am

    Well, it's gald to read your post, but I wouldn't understand your meaning well. Thanks all the same.

  18. Hitesh Chavda
    May 24, 2010 at 11:11 am

    Really Nice Information.

    Thanks to Makeuseof's Technology Explained Series and also to Matt Smith.

    I really love this section.

  19. Hitesh Chavda
    May 24, 2010 at 9:11 am

    Really Nice Information.

    Thanks to Makeuseof's Technology Explained Series and also to Matt Smith.

    I really love this section.