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Why does multiplier keep changing

Discussion in 'Overclocking & Cooling' started by Ronarch, Nov 10, 2011.

  1. Ronarch New Member

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    Hi guys,

    Not far ago I had nice suggestion about graphic cards on this forum and after that I like surfing here to try to learn more about hardwares.

    With newly bought mobo (Asrock Z68 Pro-3) , CPU (i5 2500k) and GPU (Asus Gtx560ti), I have started learning OC.

    I simply changed the CPU ratio from 33 to 40 in UEFI , enabled Internal PLL overvoltage and incease core current limit from 150 to 180. (actually I am not sure if it's neccessary, or matters)
    It runs stable, I guess. At least i played bf3 for hrs and nothing went wrong.
    The max CPU temp. raised from 73c with 3.3Ghz to 75/76c with 4Ghz.

    Anyway the question I want to ask is:
    Using CPU-Z, it shows the multiplier which I thought it is constant but it is actually floating, the minimum value is 16, and when it loads it raises to 40.
    I read some articles about OC and multiplier but I found no sentense saying it does float. hmm..it's normal... right?
     
  2. Arrakis+9

    Arrakis+9

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    its called speed step; when not under a heavy load the processor will clock down via the multiplier to a lower speed to conserve energy and run cooler increasing longevity. its normal and you should keep it on
     
    Ronarch says thanks.
  3. Mussels

    Mussels Moderprator Staff Member

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    ^ that.


    all modern processors do it, and video cards have a similar technology.
     
  4. Ronarch New Member

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    thx
    I know this question is somewhat stupid.

    on many "guiding video" i saw people enable internal PLL overvoltage and increase core current limit so i did these adjustment too.
    what do these options actually do?
    where can I find the detailed information about every option I find in my UEFI BIOS?
    thanks for helping :)
     
  5. Arrakis+9

    Arrakis+9

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    the best thing to do would be to go to your motherboard vendors fourms (if they have them) and read some of the overclocking posts there, there is no real reference guide to bios specifics due to the fact that some options are labeled differently from one bios to the next. the best thing you can do how ever is continue reading, look for sandy bridge overclocking guides and go with the "safe" routes, again your results will varry from one persons hardware to the next but it gives you a decent reference on what it should be capable of. hope this helps and welcome to the fabulous world of overclocking :pimp:
     
  6. Ronarch New Member

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    I have just bought CM Hyper 212 Evo to replace my stock fan.
    The CPU temperature drops from 45-46c to 39-40c at idle and from 75-76c to 65c at loading.
    It’s my first time installing an aftermarket CPU fan.
    Does the effect look I am doing a proper installment?
     

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