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iMac 21.5" mid-2010 CPU and GPU upgrade | MacRumors Forums
Amazon.com: Valley Of The Sun Graphics Video Card GPU Replacement for Apple iMac Mid-2010 A1311 Core i3 3.06 MC508LL/A MC508 21.5 Inch Desktop Computer, ATI Radeon HD 4670 GDDR3 256MB, MXM VGA
iMac 2010 GPU in 2011 | MacRumors Forums
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