On Apr 11, 2012, at 1:55 PM, Cameron Kaiser wrote:

>>> CPU A is indeed normally hotter than CPU B. The typical differential  
>>> is
>>> around 10 degrees Centigrade, at least on the units I've seen, but not
>>> significantly higher than that.
>> 
>> My Dual 2.7 with either the Delphi or Panasonic LCS at idle is about  
>> 155 F equally between A and B. However they  will vary 30 F between  
>> CPU's  and top temps at 185 to 200 when loaded.
> 
> That seems really high, but I've never used a dual 2.7, so maybe their
> higher clock speed == more heat.
> 

As I stated the ambient is also very important here, plus never crowd the back 
of one of the "Stanley Steamers"  (water pumpers)  too lose to a wall they need 
breathing room. Apple even states the temp of 190 to 200 F is OK, but remember 
that's not 24/7. Also at idle mine draws 250 Watts, when burning 2 or more 
DVD's at a time I'm at 550 watts. The Quads had two Delphi units, one with a 
single pump and a dual pump, the duals did have some problems. I've only seen 
one Panasonic for the Quad. 

John Carmonne
Yorba Linda CA
92886 USA
MacPro 2.66 Quad Nehalem






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