Yokemate of Keyboards
Posts: 2720 from 2003/2/24
Quote:
Robin wrote:
Well, the G4 gets always very hot. Even with the
cooler attached right ... thats why it's not delivered
with a passive heatsink like the G3 ... are you sure it's not normal ?
Indeed, and even the G3's get "quite warm" (read: feels *very hot* when you press your fingers against it) when running at 100% for some time, which is normal and generally not a problem at all!
I have a feeling that different poeples' definitions of "very hot" varies a lot. OK, this may not be too relevant, but at least it may offer some kind of reference: If you put down your hand in some water that is much warmer than 45 degrees C, you may risc getting *scalded*. At 55 degrees C, you most certainly will. OK, that is *water*, which is quite different from this, but anyway ...
Anyone, feel free to correct me about the following (because Physics was not my biggest strength in school if you know what I mean
): If you are able to press your fingers hard around the base of the cooler, *and hold them there*, then I would almost dare to claim that the temp probably is well below some 60 degrees C or so at the Junction. While this temperature most certainly will feel "very hot" to your hand, it usually shouldn't be a problem at all. I think I remember reading somewhere about some general recommendation (I may remember this wrong though, can't even remember where I read it) of keeping the average temperature of the 7447 CPU below 85 degrees or so (you would not be able to press your fingers at the base of that one I think), and as far as I understand, the max Junction temp for 7447 CPU in the specifications is 105 degrees C (which is warmer than the boiling point of water (try pressing your fingers against a metal kettle of boiling tea water
)).
The 7447 product summary page:
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MPC7447&nodeId=018rH3bTdG8653Any comments on these bold claims?
MorphOS is Amiga
done right! MorphOS NG will be AROS
done right!