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Thread: CPU PLL effect on overclocking




  1. #11
    Acebmxer's Avatar
    Acebmxer is offline Gigabyte Elite
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    Default Re: CPU PLL effect on overclocking

    I have playing with CPU PLL with my i7-920 on the X58A-UD5 and OC and to be honest I see no change in stability or instability going from 1.8v default to 1.4v, Almost as if it is a broke voltage setting. I keep it at 1.4v just for the fact its a lower voltage. I have tried up 1.84-1.86 but I think I read that 1.9v will kill it or degrade it. I am not sure that that max is for the newer gen i7's .
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  2. #12
    Lsdmeasap's Avatar
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    Default Re: CPU PLL effect on overclocking

    It's not broke, well at least it wasn't last time I played with X58

    If you turn it down too low it will cause instability for sure, so you can test that way if you think it's broken. Try 0.5-1.0V

  3. #13
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    Default Re: CPU PLL effect on overclocking

    Sweet spot for me @ x45 was 1.75V PLL. Didn't help to make further adjustments there when moving the clock to x46, though, so I ran up and down on vtt with no success, vcore on auto was already getting high so I tried working down with no success either.
    Finally had to give it up for today, other things to do, and hopefully I can get back to tackling x46 tomorrow.

    Funny thing I noticed, with block set at Auto it actually measures a little higher. With block set manually to 100 it drops a little below 100.
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  4. #14
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    Default Re: CPU PLL effect on overclocking

    ....and I definitely was seeing higher temps with the 212+ cooler even with 2 fans push/pull so I had added a vortex 120mm to the side and now the cores are maxing at about 80*C.
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  5. #15
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    Default Re: CPU PLL effect on overclocking

    Quote Originally Posted by Lsdmeasap View Post
    It's not broke, well at least it wasn't last time I played with X58

    If you turn it down too low it will cause instability for sure, so you can test that way if you think it's broken. Try 0.5-1.0V

    I seen a warning update some where that the revision XX of Z68 boards had defaulted high CPU PLL voltage, sorry if this iis an old thread.
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