2 problems with 7970: high clock during desktop activity and strange noise under load

Discussion in 'Videocards - AMD Radeon' started by autior, Apr 23, 2013.

  1. autior

    autior Member

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    GPU:
    MSI 6950 2GB T. Frozr III
    Hi, I just bought a Sapphire 7970 and installed the latest drivers, but this is what happen:

    [​IMG]

    For few seconds the VGA switch from low to high clock (like when gaming) and then return to low clock, all of this during normal desktop activity, like surfing on internet,

    The second problem is that the VGA emits a strange noise (like a whistle) under load, and I noticed that when it emits this sound I can see the PWM backlight flickering clearly.

    Any help would be appreciated, thanks. :)
     
  2. XBEAST

    XBEAST Ancient Guru

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    GPU:
    MSI GTX 770 Gaming
    Clock switching during regular activity is normal. Browsers use hardware acceleration. Windows Aero too.

    That noise is coil whine probably. Annoying, but not a defect. If you want, might try to return it.
     
  3. Deathchild

    Deathchild Ancient Guru

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    Yeah in conclusion you have a totally normal working card. If you're playing something try turning on V-sync, that might fix it. Or setting an fps cap in MSI Ab at 60 fps.. also might take away the coil whine.

    Otherwise, it's normal. So no worries. :)
     
  4. autior

    autior Member

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    GPU:
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    Actually the noise was the coil whine you were talking about (tried with Civ5: no noise with V-sync activated, noise without it). Never heard about this, thank you guys.

    About the "clock switching" during desktop activity, I disabled HW acceleration in my browser, but it could be Windows Aero as you said. I'll try to reinstall the drivers and see what happen.
     

  5. Deathchild

    Deathchild Ancient Guru

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    The clock switching is normal, you don't need to do anything about it.
     
  6. eclap

    eclap Banned

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    GPU:
    Palit GR 1080 2000/11000
    the coil whine happens when the gpu outputs crazy fps. for me it's noticeable at over 1000fps. this can happen in game menus. in these games I just cap the framerate to 200 in msi afterburner and that fixes it.
     

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