iMac Intel 27" EMC 2429 Radeon HD 6770M Graphics Card - iFixit Store
How to upgrade a Mac: Swap in new RAM, graphics card, hard drive and more | Macworld
2010 iMac GPU Upgrade to NVIDIA GTX 765M - YouTube
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How to upgrade a Mac: Swap in new RAM, graphics card, hard drive and more | Macworld
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Apple opens graphics card replacement program for some mid-2011 iMacs - 9to5Mac
iMac 2010 GPU Upgrade
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