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Intel iMac 27" AMD Radeon 6970M 1GB Video Card, Mid 2011 DIY Parts replacement Video Cards
Late 2009 iMac 27" Video Card Repair [4850 Bake] - YouTube
Apple iMac 27" Mid 2011 Video Card - ATI Radeon 6970 with 1GB GDDR5 me - Part Haven
Amazon.com: Valley Of The Sun 2GB Graphics Video Card Upgrade for Apple iMac Mid-2011 27 Inch Core i5 MC814LL/A MC814 A1312 Desktop All-in-One PC, AMD Mobility Radeon HD 6970M Replacement Repair Parts :
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Upgrading the graphics in our 2011 iMac (first attempt) - YouTube
For IMac 27 A1312 Mid 2009 2010 2011 6970m 1GB 2GB 109-C29657-10 Upgrade For Nvidia GTX 765M DDR5 2GB MXM TYPE-B VIDEO GPU CARD | lupon.gov.ph