Hrishi
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You can't say.. It's apple..
I don't have it.. I just saw that review.. BTW does it matter??
even if you gain 70C ain't it almost 20C cooler than average lappy??
Point is that a Quad-Core IVB will heat for sure specially while gaming, unless throttled or super-cooled( 80's for either core is definitely possible and okay followed by throttling ).
And for reference previous Macbooks had horrible cooling. rMBP is having better thermal-maintenance mechanism but still it's a laptop profile. It has it's limits.