At 08:20 PM +0100 04/13/2004, Mark Benson wrote:---------------------
What has me confused is why on this earth Apple decided to shoot the whole thing in the foot by fitting them the wrong way around.
I've lost track of what's what in this thread,,, but one thing occurs to me...
I remember years when Digital caught on that heat rises. Suddenly, they put their power supplies in the top of their cabinets -- and avoided having to change to chilled liquid cooling in their mainframe-class systems. They also saved money by venting the cabinets to/through the top, using fans to accelerate the already naturally rising air.
Now take a look at Apple's latest: the Power Mac G5. Is that not the power supply on the bottom, with the G5 blocks just above, and fans that blow perpendicular to the natural direction of the hot air?
Perhaps there be [continued] clue[lessness] there?
Perhaps they need to Think Different.
or repeal some of the thermodynamics laws...
I once set up a Quicksilver G4 with four hard drives for use as a graphics workstation. I worried at the time because the side fan in this model blows into the center of the case, not upon the stacked hard drives in the provided carrier. Sure enough, the top hard drive in the stacked configuration died of heat exhaustion in the first year.
At MacWorld Expo in NYC I asked the Apple rep if the Quicksilver fan should not have been positioned so as to blow on the stacked drive carrier since stacked drives not only create twice the heat of single drives but the upper drive is heated by the lower drive. I was assured by the rep that the cooling design was just fine.
Then, in the next run of Quicksilver G4's that came out, the side cooling fan was moved over so that it blows directly onto the stacked drive carrier. Four hard drives installed in this model have had no hard drive failures for us.
At least some of Apple's engineering appears to be the "throw it together and then adjust it while the user uses it" type. The 9600 was one of the best computers Apple ever made but the early 9600/200 was not one of the best and was hardly comparable to the later 9600/300 and 9600/350. Personally I will take an interest in the G5 when I see how their new multi-fan cooling system works out.
--
James K Morgan
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