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Upgrading the graphics in our 2011 iMac (first attempt) - YouTube
2011 iMac Graphics Card Upgrade | How to | Mac Expert Guide
Review: Apple's 27" big screen iMac (late 2009) | AppleInsider
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iMac 27" Video Card Upgrade | MacRumors Forums
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Upgrading a 2009 iMac CPU - Mac Yak
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