What temperature is your BlizzardPPC or CyberstormPPC running at?

[Hanzu]

While using OS 4.1 Classic with Cyberstorm PPC only few hours and experincing one hang & freeze of screensaver requiring reset and resulting CF formatted to FFS corruption as "Not a DOS disk" I became worried about what working temperature is ok for 233MHZ 603e PPC.

I the tempereatures with NesteQ MaxZero and if they seem to be not right then double checking with various IR sensors.
With OS3.9 idling PPC 603e 233MHz is in temperature of 47°C and 060 66MHZ is in 35°C
I have a custom heatsink for 603e and original heatsink for 060. Fan is 120mm running 540RPM at height of 7mm above heatsink, because SIMMs prevent it going any lower.

Page 27 of http://www.freescale.com/files/32bit/doc/data_sheet/MPC603EC.pdf says

...resulting in a die-junction temperature of approximately 66°C which is well within the maximum operating temperature of the component.

Well if Junction Temperature means this:
http://en.wikipedia.org/wiki/Junction_temperature

What exactly "well within the maximum operating temperature of the component."? I'm not native English speaker, so someone explain expression "well within" is well inside limites or at the edge of limits?  

Does die-junction Temperature mean a temperature where component dies?

And what temperature was your Blizzard PPC or Cyberstorm PPC running at if you had or have one?

[zipper]

I didn't ponder on it - just bolted a fan onto the 060 and CVPPC - and had to change the pathetic one on the PPC as it died in a week.

[freqmax]

Die junction temperature is the temperature of the chip inside the package. Many CPU:s have a maximum at 90 - 125 - 150 °C depending on type of chip, exact number can be found in the datasheet for the chip in question.

From that one has to calculate the amount of heat transfered from the die to the case which is given in the datasheet, in °C/W. Next is the case-to-heatsink with same units. And then finally from heatsink to ambient (air) also in the same unit.