Square Base Heat Sink

  1. In my physics test, a question was asked why the heat sink has a square base. Anyone can answer this? i searched the internet but could not find much. Any help would be greatly appreciated. :)
  2. jcsd
  3. thanks for the reply but i wanted to know about the base, not the fins. But thanks anyway!! :)
  4. lol But it came from a physics test, so i presume the reasoning should be related to physics but maybe you are right. Thanks anyway!! :)
  5. Probably because the heat sink is extruded aluminium, and square sections are just cut off from the length. If you wanted a round flat face then extra cost with machining would be involved.
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