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    P-7811FX Lockup when Overclocking

    Discussion in 'Gateway and eMachines' started by ZubZub, Apr 27, 2012.

  1. ZubZub

    ZubZub Notebook Guru

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    I've had the 7811FX since November 2008 and I have been tweaking it constantly.

    I used to overclock the GPU to 700/950/1850 and it would never lockup, shutdown or anything. (Even when the temperature went past 90 degrees Celsius!)

    Recently, I tried to run some 3Dmark06 benchmarks and my display would turn off, forcing me to hard reboot with the power button. This happened with GPU at default clocks.

    After installing a T9600, I wanted to run some benchmarks again, but the system kept locking up (default + overclocked GPU). The screen goes black, the laptop stays ON, but I have to hard reboot.

    Here is a list of the things I did to try fixing the problem:
    • Disassembling the whole laptop to clean any dust and applying ICD7 on the CPU, Northbridge Chipset, GPU, and GPU Ram Chips
    • Installing old and new nVidia drivers
    • Undervolting the CPU to achieve cooler temperatures (preventing TZS0 from spiking to 98 Celsius)
    • Disabling/removing nVidia PowerMizer

    The laptop is always propped up 1-2 inches from the surface and plugged to AC adapter. BIOS is 9c.17.00 and max temperatures are TZS0/CPU 60*C, GPU 70*C
     
    ZubZub, Apr 27, 2012
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  2. andros_forever

    andros_forever Notebook Deity

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    Have you tried installing my vbios mod? http://forum.notebookreview.com/gat...-solution-nvlddmkm-video-crash-p-7805u-5.html
     
    andros_forever, Apr 27, 2012
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  3. ZubZub

    ZubZub Notebook Guru

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    Thank you for the suggestion, but isn't it counter intuitive to flash my Bios ROM with "lowered clocks" when I'm actually trying to overclock my rig?
     
    ZubZub, Apr 28, 2012
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  4. TANWare

    TANWare Just This Side of Senile, I think. Super Moderator

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    The thing with OC'ng the system is eventually you will prematurely wear out the components. Sometimes a cleaing up of the tim etc can extend life a bit but you are tempting fate...................
     
    TANWare, Apr 28, 2012
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  5. ZubZub

    ZubZub Notebook Guru

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    I think you are right TANWare, I can't avoid the fact that the laptop is around 4 years old and has been through some rough times. As stated above, I already cleaned up and changed the TIM.

    My last resort is to overclock by 5-17Mhz everyday until I get stable clock settings.

    Thanks for chiming in guys, I won't be seeking anymore help, but if anyone wants to drop a word or two, go for it.
     
    ZubZub, Apr 28, 2012
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  6. andros_forever

    andros_forever Notebook Deity

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    You can change the 3d values to whatever you want with Nibitor, or simply OC with Nvidia tools in Windows. The other "throttle" values that I change usually help in stability. Might be worth a shot, but like TANWARE said, it might just be a case of age and wear.
     
    andros_forever, Apr 28, 2012
    #6