On 07/10/11 9:11 PM, Josh Dersch wrote:
  On 10/7/2011 5:08 PM, Toby Thain wrote:
  On 07/10/11 12:59 PM, Josh Dersch wrote:
  ... The fan controller(s) in the first Macbook
 Pro were set to almost *never* turn them on. The fans ran at extremely
 low speeds even when the machine was baking your pants to your legs. I
 picture this as another case of Jobs' "ideals vs. engineering" (see
 also: Apple III, G4 Cube) -- "This thing needs to be silent!" ... 
 On the whole, he was right. Passive cooling was sufficient for the
 Lisa, the original classic Mac, and the G4 Cube.
 
 He may have been right in theory (and where the available technology
 supported it) but he was incorrect in practice. Passive cooling works
 where passive cooling is sufficient. (And the G4 Cube definitely
 overheated.) 
None of our Cubes overheated. Perhaps you are in a different climate.
  Where it isn't sufficient, it doesn't work and
you get
 laptops that are uncomfortable to use like the MacBook Pro in my example.
  And people still hate fans. Apart from the noise,
a 20c fan frequently
 kills a $1000 computer or a $200 video card (thanks China!) 
 So... buy a better fan? It'll last longer and be quieter! Fans are
 replaceable, a laptop that has suffered thermal component failure due to
 poor design, less so. 
Fans are only theoretically replaceable. In practice, at least in the PC
and laptop world, nobody replaces them until the expensive part to which
they are attached, dies.
>
> When critical cooling components can fail and destroy expensive parts
> without warning, that's a serious design error. 
(This is the rule, not the exception.)
 When critical cooling components are left out for aesthetic reasons,
 that's a serious design error. 
And where they are not: It's a design success.
--Toby