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Model A1297 Unibody: Early 2009, Mid 2009, Mid 2010, Early 2011 & Late 2011

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Why my Screen start Flickering when VGA auto switch to HD 6770M?

Hi everyone...,

Two days ago i have finished rendering my work with C4D. it takes 28 hours long. After that, my screen is always flicker when auto switch to AMD HD 6770M Graphic Card but when Intel HD Graphic 3000 is on everything is normal..

As we know, MBP 17 Late 2011 has these two VGAs will auto switching depend on application running

How Do I Fix it?

Here is the video of my screen looks when flickering started :

http://www.youtube.com/watch?v=RFv8iQP78...

thanks...

Answered! View the answer I have this problem too

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You don't fixit, it isn't broke. Stick to the card your app is optimized for.

The resolution of thee better card must be set up wrong in your app OR you need to change the refresh rate of the card in display preferences to stop the flicker.

If this Answer is helpful please remember to return and mark it Accepted.

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