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2011 21″ iMac (HD6770M) [2nd,4C,S] + RX 460 @ 10Gbps-TB1 (AKiTiO Thunder2) + macOS 10.12.5 // 20Gbps vs 40Gbps TB3 cable – External GPU Builds
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2011 Mac Mini [2nd,2C,M] + RX 470 @ 10Gbps-TB1 (AKiTiO Thunder2) + macOS 10.12.2 – External GPU Builds
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Adding an external GPU to your Mac is probably a better upgrade option than getting a new one | TechCrunch
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