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Would probably be beneficial but it looks hideous and unless you are having serious heat issues (for which you should consult Apple), then you do not need this.
 
What are the operating temperatures under no load and at normal operating load for you?

I have absolutely no idea how to check that - I just remember that while playing Deus Ex, the fans go TURBO!! and the aluminium really heats up. After the fiasco with the 750M I just wanted to make sure that nothing happens with the AMD ones as I am a college student and need this laptop to last for sometime.
 
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