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Thread: Intel Turbo Boost Question!




  1. #1
    Join Date
    Apr 2009
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    Default Intel Turbo Boost Question!

    Right now i am running 4.0ghz + Ht On and stable at the moment, also disabled all power saving features.

    If i enable turbo boost from what i heard you get a permanent 21x from latest bios release correct?

    If i do enable it, do i need to increase my voltages to make it stable ? and does enabling turbo boost give you higher temps ?

    Can't resist not going 4.2ghz with the free multiplier, but i am afraid i need to change voltages again to make it stable ?


    I read somewhere in xtremesystems forum, you don't need to raise any voltages to make turbo boost stable, and i also read you need to increase voltages to make it stable.. which is it ?

  2. #2
    Join Date
    Feb 2008
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    Default Re: Intel Turbo Boost Question!

    Yes, enabling turbo gives you 21 multi with latest bios.

    From that point on, you simply quit thinking of it as being anything other than a 21 multi.

    So basically if you are running 20x200 or 4ghz and now running 21x200 or 4.2ghz, you will need more vcore. However, there is a caveat. The 20x multi needs much more vcore to use per mhz than the 21 multi or 19 multi. So one + and one - as for vcore. For example, typically you need +.03 vcore per every 100mhz after 4ghz. So increasing from 4 to 4.2, typically need +.06vcore. But using 21 multi instead of 20, you may need .03 to .04 less vcore for same mhz. So net increase in vcore you may need will probably only be +.02 to +.03v. But only way to know for your cpu is to run stress testing and find out.

    Yes you will need to change voltages again and rerun stress tests to see.

    Will temps be higher, yes you will be adding mhz and vcore, so temps will be higher.
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  3. #3
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    Default Re: Intel Turbo Boost Question!

    Quote Originally Posted by rge View Post
    Yes, enabling turbo gives you 21 multi with latest bios.

    From that point on, you simply quit thinking of it as being anything other than a 21 multi.

    So basically if you are running 20x200 or 4ghz and now running 21x200 or 4.2ghz, you will need more vcore. However, there is a caveat. The 20x multi needs much more vcore to use per mhz than the 21 multi or 19 multi. So one + and one - as for vcore. For example, typically you need +.03 vcore per every 100mhz after 4ghz. So increasing from 4 to 4.2, typically need +.06vcore. But using 21 multi instead of 20, you may need .03 to .04 less vcore for same mhz. So net increase in vcore you may need will probably only be +.02 to +.03v. But only way to know for your cpu is to run stress testing and find out.

    Yes you will need to change voltages again and rerun stress tests to see.

    Will temps be higher, yes you will be adding mhz and vcore, so temps will be higher.
    Thanks, so normally only additional 0.2-0.3 volts ? i am actually running my 4.0ghz @ 1.25vcore in bios, qpi/vtt - 1.30, dram voltage - 1.64, cpu pll - 1.88 all others are auto

    20/20 Pass on Linx Full Memory, and 2-3 hours in OCCT. For some reason if i increase my qpi/vtt to 1.36 for example it bsod's in the first minute of occt, but after i changed it to 1.30 no more bsod, no more crashes.

    Should i just try it with 1.25vcore for 21x multi ?

  4. #4
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    Default Re: Intel Turbo Boost Question!

    Not 0.2-0.3V, 0.02-0.03V.

    Enabling constant Turbo is, as already said, exactly the same as being given an extra 1x on the multi. Turbo Boost is just an Intel bullsh1t marketing thing, to give users something to press to make their machine go faster, and to make the consumer feel good. Like a "Look at me, I'm overclocking" kind of thing.

    Nice to see that the BIOS programers have converted this "awesome feature" into what it actually should have been, ie a CPU with a 21* multi.

    It might not just be Vcore you have to change either. As with overclocking anything, just because it's a multiplier you're raising and not a FSB/Bclk, doesn't mean your other voltage settings will play nice with the new settings.

    Just treat it like any other overclock. Raise the multi, stress test, and tune voltages as needed.
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