A1481 Apple Mac Pro 6,1 Top Exhaust Heat Sink Assembly. Mac Pro A1481 MacPro6,1. Top Exhaust Heat Sink Assembly only. Mac Pro 6,1 Late 2013: MD878LL/A (3.5 GHz 6 Core Xeon E5-1650v2). Mac Pro 6,1 Late 2013: MQGG2LL/A (3.0 GHz 8 Core Xeon E5-1680v2).
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