Re: Keep computer on or turn off after use?
- From: w_tom <w_tom1@xxxxxxxxxxx>
- Date: Sun, 17 Jul 2005 14:00:34 -0400
Power cycling is destructive. One component that has a
very poor number of power cycles was an IBM disk drive - rated
for 40,000 cycles. That is seven power cycles every day for
..... 15 years. So yes. Power cycling is destructive when
talk is subjective. But with numbers, then the conclusion
takes a 180 degree turn.
Numbers are where you begin. Concepts not tempered by the
numbers and other real world facts are nothing more that junk
science reasoning. Once we apply the numbers, then power
cycling a computer is just as destructive as power cycling the
TV.
More numbers. Semiconductors thermal cycle some tens of
degrees in normal operation. Is this thermal stress? If so,
then semiconductors that are manufactured by thermal cycling
400 and 500 degrees never work. How do they get working
semiconductors out of the fab?
IOW thermal cycling by powering on and off is near zero
temperature - to semiconductors. Even thermal cycling at
hundreds of degrees is not destructive. Just another example
of what happens once we apply numbers to speculation. Too
many posts only speculate - don't provide numbers and other
facts from datasheets.
One citation even claimed thermal stress when power cycling
light bulbs. That stress is also mythical. Again, we first
consult the numbers from light bulb manufacturers. Power
cycling is not destructive. For if it was, then the orange
turn signal inside traffic lights - the light that flashes all
night - would be the first to fail. Orange is by far the last
to fail. Power cycling is not destructive to light bulbs.
Hours of operation and mechanical shock when hot are the
destructive factors. Manufacturers even provide equations for
those hours of operation. But again, junk science reasoning
will dispute what numbers and facts even from the
manufacturers report.
Numbers are where you start. Which posts only provided
speculation? Which ones provided numbers? Power cycling to
computers is significant when component - typically rated for
100,000 power cycles - is going to be used 40 years. Numbers
that myth purveyors forget to include when claiming power
cycling is destructive.
Why is this topic so controversial? Note the many who just
know without consulting or providing numbers. No numbers is
essential to promoting junk science reasoning. Power cycle it
just like you do a TV, radio, or incandescent lamp. Why? The
numbers.
Joe K wrote:
> Joe K wrote:
>> Is it ok in gereral to keep a computer on 24/7 or after a days
>> work turn computer off?
> Thanks everyone for your reply.I will consider them all.
.
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