How to purchase a high quality CPU Cooler?
There are three criteria in choosing a high-quality CPU Cooler:
To be more specific:
Great heat dissipation function
While evaluating the effect of heat dissipation, people should not only
consider not to let CPU overheat, but also to prolong the CPU life as
much as possible. In scientific terms, CPU life and temperature is in
an inverse ratio. In other words, they follow the inverse power law model.
The formula is as follows:
A=(Taccelerated / Tnormal)m
A: accelerator T: temperature m: factor
If a CPU continues under a high temperature condition for a long time,
that will shorten its life. For example, if m=10, at 25oC degree of normal
temperature, CPU life is around 30,000 hours. But when the temperature
has reached to 70oC degree, the life will shorten to 7353 hours.
A=[ (273 + 70) / (273+25) ] 10=4.08,
life at 70oC degree would be 30,000 hours / 4.08= 7353 hours
We can see from this that CPU life dramatically depends upon the temperature
level. As for the m value, it can be figured out by calculating two life
cycles at two different temperatures. For instance: life cycle is 7352
hours at 70oC degree and 6361 hours at 75oC degree will be:
[ (273 + 75) / (273+70) ]m=(7352/6361), then m=10
The general principle to maximize the effect of heat dissipation is to
make larger heatsinks with high C.F.M.
Long life fans with low noise
There are three features for a long life and low noise fan:
- Good motor design: It can be tested by pointing the running fan to
make it stop and then rotate the fan toward the same direction again
with a low speed. With a poor fan design, the fan will stop running
again when meets the "dead point".
- To apply a ball bearing fan instead of sleeve bearing one to extend
its life
- The noise problem can be solved by choosing medium-speeded fan instead
of high speeded one. However, at the same time, the effect of medium-speeded
fans not as powerful as the high-speeded one. The good news is that
it can be compensated by creating the ventilation holes on the bottom
of heatsink. This design is specially made by Global WIN Technology
R&D team and it had been approved by Taiwan Central Standard Organization
and granted a patent (Patent number 115376). Then ventilation holes
will not only enlarge the heat dissipation area, lessen the weight of
heatsink, lessen the air pressure but also increase the air flow. All
these will further straighten the effect of heat dissipation. Well-designed
clips:
A well-designed clip should meet the following
criteria:
- easy to install and dismantle but not too easy to dismantle to avoid
cooler falling off
- applicable to all kind of motherboards
- The clip mounting system should be able to pass ventilation and drop
tests of motherboards. In order to improve coolers' stability while
attached to CPU, it would be an enhanced design to build a leverage
on the bottom of heatsink to fit into the gap between CPU and ZIF socket
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