Intel Mac :: Display Jumps When Using The Mouse What Is The Cause?

Apr 22, 2012

I purchased an iMac 27in with an i7 quad core, 8G of memory, and 1G video memory. I have up dated all software to current levels, the display jumping still persists.  it happens when the mouse pointer is dragged across the dock or installing something from a disk or downloading from the internet.  What could be the possible cause?

Info:
iMac, Mac OS X (10.7.3)

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Dec 14, 2009

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Info:
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Info:
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Sep 5, 2010

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Info:
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Jul 3, 2008

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Oct 6, 2008

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Info:
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Oct 24, 2009

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Battery Information:

Model Information:
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Info:
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Info:
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Info:
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Info:
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