If a processor heats in a 70 degree F room to cause reboots,
then semiconductor or other hardware is defective. In fact,
Intel CPUs even back to some 486s simply slow down if too hot;
no reboots and no damage.
Posted are other myths about heat such as a 'need' for
thermal compound. Thermal compound typically results in a
less than 10 degree temperature reduction in CPU heat - a
reduction that should be totally irrelevant to whether a CPU
overheats and reboots. More important reasons for using
thermal compounds are heatsinks not properly machined. If
thermal compound results in greater temperature reduction,
then the computer assembler should first start with himself as
reasons for the problem. We recommend thermal compound because
too many computer assemblers buy defective heatsinks. They
buy on price rather than degrees C per watt.
Yes a stuck fan can cause problems. But will more cooling
solve a hardware problem? Of course not. More fans cure
symptoms.
Will a hotter processor (still within manufacturers spec
range) fail faster? Yes. And then we apply numbers to the
conclusion. So it will fail in 100 years instead of 150
years. Who cares? Those who make claims without numbers
promote half truths. When numbers are applied, claims about
'heat causing premature failure' becomes irrelevant.
Heat is a problem when IC temperature exceeds manufacturer
limits. An IC operating within manufacturer numbers that
fails when warmer (and still within specs) is defective and
must be replaced. Heat is the diagnostic tool to find
defective hardware - including a stuck fan or a CPU heatsink
that was not properly machined.
Applying thermal compound to fix a defective heatsink does
not solve the real problem- a human who buys heatsinks on
price rather than first obtaining thermal conductivity
numbers. Heat is a tool to find defects. Too many computer
assemblers would rather cool their mistakes with too many fans
rather than deal with THE reasons for that failure. If the
processor gets so hot as to cause reboots, then we have a
defect that must be fixed. Too much heat did not cause that
processor reboot. Something defective causes too much heat to
cause a reboot. Use heat to find and replace defective
hardware - such as heatsinks machined so poorly as to require
thermal compound or too much thermal compound between CPU and
heatsink.
What is too much heat? Temperatures that exceed those
manufacturer numbers. Old engineer's guideline for
semiconductors: touch it and it does not leave skin, then it
is not too hot.