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  1. #1
    Member Joni's Avatar
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    C6 State. How much does it save on AMD?

    Anyone ever measured the power consumption on idle with C6 off and on? I tried to find some information about this but not any tests with FX or Phenom. Anyone have a Watt-O-Meter?
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  2. #2
    Registered Nick2bad4u's Avatar
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    I'd be interested in seeing those results as well.
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  3. #3
    Member Joni's Avatar
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    I bought a meter, I'll try it later today.
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  4. #4
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    For chips like amd's fusion lineup it makes a decent difference allowing you to run most of the time around 30 watts while doing stuff vs 70watts with c6 off. That is assuming your running a small load like web browsing or watching movies. Something thats really only touching 1 core or so.

    You'll notice it doing quite a bit on Intel Xeon's aswell. They've had very very aggressive power profiling for quite a while now.
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  5. #5
    Member Joni's Avatar
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    On default power settings idle was about 98W (1400 MHz), with C6 state disabled from BIOS idle was about 117W (4000 MHz). On both cases full load on Prime95 was about 260W.

    I had Turbo disabled, clocked to 4000 GHz with default voltages.

    So it's not a big sin to keep C6 disabled, especially if you get some coil whine with C6 turned on.
    Last edited by Joni; 04-25-12 at 12:59 PM.
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  6. #6
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    EarthDog's Avatar
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    C6 is a sleep/idle state so in full load you will not see a difference.

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  7. #7
    Member Joni's Avatar
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    Yeah, I just added it to show how much it takes at 4.0 GHz vs idle.
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