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    Gateway P-7811 FX CPU Overclock Research

    Discussion in 'Gateway and eMachines' started by El_Capitan, Sep 12, 2009.

  1. El_Capitan

    El_Capitan Notebook Enthusiast

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    Here's what's known:
    1. No overclock possible through the latest BIOS (9c.12.00).
    2. There's no TME that disables/enables overclocking compared to other PLL's.
    3. The PLL for the P-7811 FX is 9LPRS365BKL. http://www.idt.com/index.cfm?genID=9LPRS365
    Looking at their site, they list 3 PDF's. ics954201, ics954204, and ics954321.

    Research:
    FS_C, FS_B, and FS_A inputs determine the CPU clock, and up to 400.00 MHz is supported. Currently, the inputs are default at 0,0,0 with the CPU clock at 266.66 MHz.

    Looking at the Block Diagram, the FS(C:A) inputs into the Control Logic. In short, pins 12 (FS_A), 16 (FS_B), and 53 (FS_C) determine the output of the CPU Clock.

    On the SMBus:
    Byte 6: Bit 0 = FS_A, Bit 1 = FS_B, and Bit 2 = FS_C.

    Goals:
    #1. Get FS_C to input 1 and not 0. That'll set the CPU Clock to 333.33 MHz.
    #2. If Goal #1 works, get FS_B to input 1 and not a 0. With both goals accomplished, that will set the CPU Clock to 400.00 MHz.

    Note: The bits are read only, so the only way to change it is to make the input at Pin 53 and/or Pin 53 and Pin 16 a high.
     
    El_Capitan, Sep 12, 2009
    #1
  2. Omexis

    Omexis Notebook Consultant

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    Actually the TME bit is enabled, so no overclocking possible unless hardware mod is made or the bios is changed.

    Try looking at the other threads with regards to this matter
     
    Omexis, Sep 12, 2009
    #2
  3. moral hazard

    moral hazard Notebook Nobel Laureate

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    moral hazard, Sep 12, 2009
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  4. El_Capitan

    El_Capitan Notebook Enthusiast

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    How do you know for sure TME bit is enabled? I can't find documentation for that. I've looked at other threads, but nothing for the P-7811 FX specifically.

    The PLL for the P-7805u is 9LPRS355CG, but it seems they do use the same documentation.
     
    El_Capitan, Sep 12, 2009
    #4
  5. Omexis

    Omexis Notebook Consultant

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    Use SetFSB to read the PLL registers and you will see that the TME bit is enabled
     
    Omexis, Sep 12, 2009
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  6. El_Capitan

    El_Capitan Notebook Enthusiast

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    Ah, there's advanced documentation on your thread moral hazard. Thanks, will keep track there.
     
    El_Capitan, Sep 12, 2009
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  7. Syngensmyth

    Syngensmyth In All Seriousness

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    I have not seen the El_Capitan name since the old Rise of Nations hey days. I suppose you are not THE El_Capitan of RoN Infamy?
     
    Syngensmyth, Sep 12, 2009
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  8. El_Capitan

    El_Capitan Notebook Enthusiast

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    The one and only.
     
    El_Capitan, Sep 13, 2009
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  9. Syngensmyth

    Syngensmyth In All Seriousness

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    I still love the game and play it but never got into online play. I downloaded and watched many of your recorded games while learning. No one could play RoN as smoothly and smartly as the great El_Capitan. You are the master. It was almost as much fun to watch you play as play the game myself.

    Good to see you are still kicking. All the best to you. :)
     
    Syngensmyth, Sep 13, 2009
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  10. El_Capitan

    El_Capitan Notebook Enthusiast

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    Lol, thanks for the suck up. ;)

    I have a nice desktop setup, but I can only play RON on my laptop since I'm so used to it. :eek:
     
    El_Capitan, Sep 13, 2009
    #10