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Thread: AMD FX "Vishera" reviews info (again, after mod mistake)

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  1. #11
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    Quote Originally Posted by tbone8ty View Post
    question is what volts/clock speed would it would take to reach 77w?
    These numbers are recorded with the same chip I posted the previous charts with.

    FX-8350
    Node TDP = 125W (in real world applications, TDP will be exceeded in Prime95 or similar software. On both AMD and Intel).
    Base TDP = 6.75W (Core Northbridge + Logics).
    Core TDP = 118.25W (Node TDP - Base TDP).

    Target Node TDP = 77W
    Target Base TDP = 6.75W
    Target Core TDP = 70.25W

    At stock frequency (4.0GHz) and with the rated (1.3250V) voltage, this chip exceed the rated Core TDP by 15.5% in Prime95 LargeFFT (136.66W DCR Pmax). Therefore the Target Core TDP with this margin included is 81.1W (70.25*1.155).

    Result: 3600MHz / 1.1250V
    DCR Pmax: 79.6W (72A @ 1.105V)
    Total Node TDP: 86.3W

    In a real world application (tested with Pov-Ray 3.7 RC6), at stock frequency (4.0GHz) and with the rated (1.3250V) voltage the actual DCR Pmax was 1.57% below the rated Core TDP value of 118.25W (= 116.42W). The Target Core TDP with this margin included is 69.2W (70.25/1.0157).

    Result: 3500MHz / 1.0875V
    DCR Pmax: 66.2W (61A @ 1.085V)
    Total Node TDP: 72.95W

    The underclocked frequencies are Prime95 LFFT stable for 20 minutes or more.

    ps. At 3.3GHz / 1.05V the Node TDP was 63.8W

    Anyone seen a FX doing 5.1GHz Prime95 LargeFFT with aircooling and with 4 or more cores enabled?
    I have
    Last edited by The Stilt; 12-27-2012 at 05:09 PM.

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