Middle square is only 10 by 10, naptime for Bill?
Uniform heat source on this one, CPU-IHS would be a very boring picture. Non-uniform sources are a whole 'nother can o' worms (when I put all 100W in one corner of the 'die', I got over 200°C corner to corner).
74% of the heat was transmitted through the 12x12 area indicated by the old rule of thumb of a 45° spreading angle.
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