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SOLVED: AMD Radeon HD 6770M on iMac can be replaced by AMD radeon 6970 - iMac Intel 27" EMC 2429 - iFixit
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AMD/ATI Radeon HD 6770M wont show bios in GPU-Z and wont be recognized in win 10 | TechPowerUp Forums
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AMD/ATI Radeon HD 6770M wont show bios in GPU-Z and wont be recognized in win 10 | TechPowerUp Forums
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