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Problem with Overclock 2X5970 !!! HELP PLEASE

Hello

I have Two 5970 and i want overclock both . ( also i have CPU graphic . Intel HD Graphic )

I used AftreBurner and AMD Catalyst .

1 . When i connect monitor to the one 5970 everything is fine for overclock , and i can use afterburner or AMD Catalyst for overclock but after few seconds when GPU is under lode ( 99%) i got this error ( Even when GPU clock and Memory is default ): Display driver stoped working and recovered successful .

2.when i connect monitor to the mainbord VGA ( in fact CPU graphic ) Everything back to default and GPU work fine under 99% lode ! but i can't overclock my 2x5970 . in AFTERBURNER everything is locked and in AMD CATALYST Performance tab is hidden . so i can use only default memory clock and clock work .

So my question is how i can OverClock 2X5970 when i use CPU Graphic ?
Please help me i really need that :(
3 answers Last reply Best Answer
More about problem overclock 2x5970
  1. Best answer
    What's the point of overclocking your GPUs if your use the onboard graphics? If you plug in the display cable to the mobo, the 5970s are not being used.

    Did you raise the voltage of the 5970s when you overclocked? Because you should have.
  2. ihog said:
    What's the point of overclocking your GPUs if your use the onboard graphics? If you plug in the display cable to the mobo, the 5970s are not being used.

    Did you raise the voltage of the 5970s when you overclocked? Because you should have.


    Thank you Ihog !
    yes , I used onborad graphic .
    1.When i plug in the display cable to the 5970 i can do overclock ( change memory_clock , change fan speed , change core_clock ) but on this mode , under 99% GPU lode i got crash , also when i use default memory and core clock

    2.When i plug in the display cable to the mobo i can't overclock ( everything locked or disabled also overdrive hidden in AMD Catalyst ) but GPU work in default core_clock and memory_clock without crash even i use 99% of GPU

    So i need overclock my card when i plug in the display to the mobo
    what is your advice ?
    I'm sorry for my english
  3. I'm sorry, but the language barrier is tremendous here. I feel like anything I say will be interpreted wrong, since you didn't answer my question at all.
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