iMac Intel 27" EMC 2374, AMD Radeon HD 4850 Video Card Removal & Repair - iFixit Repair Guide
iMac Graphics Card GPU Overheating and Failure
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iMac 21.5" 2010 - GPU Replacement - Not booting : r/mac
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iMac 2009 to 2011 (A1311/A1312) Upgrade Guide – MacintoshMen
iMac Intel 24" EMC 2267 Graphics Card Replacement - iFixit Repair Guide
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iMac Intel 21.5" EMC 2428 GPU Card Replacement - iFixit Repair Guide
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