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post #1811 of 2002
Quote:
Originally Posted by Lantian View Post

This should clear this up http://martinsliquidlab.org/2012/05/01/alphacool-nexxxos-st30-360-radiator/4/
comparison o different fan speed on 360mm rad, and the heat that can be dissipated with it at given speeds, and i would say differences are pretty dramatic
This is relevant to some extent, but you have to know how to read between the lines.
Nether of us were discussing the wattage usage that is shown, and 2200RPM falls short of the numbers we are talking about. The dramatic differences in the article shows how much more inefficient a fan becomes at increasingly higher RPMs, read his conclusion.
Edited by Luke Cool - 10/18/14 at 5:25pm
post #1812 of 2002
the wattage the graphs are showing is the radiator heat dissipation in watts, which is the way you measure heat, and it clearly show that you have a lot more cooling power( again measured in watts not C or F) when you are pushing more air trough the radiator, there is nothing to read between the lines
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post #1813 of 2002
Quote:
Originally Posted by Lantian View Post

the wattage the graphs are showing is the radiator heat dissipation in watts, which is the way you measure heat, and it clearly show that you have a lot more cooling power( again measured in watts not C or F) when you are pushing more air trough the radiator, there is nothing to read between the lines

Watts = Amps x volts

"the radiator heat dissipation in watts" ????
Show me how they do this, show me the equation.
Heat is measured in joules degrees calories and Btu,
measuring heat in Watts is a new one on me and the scientific community.
Energy usage and losses create heat, not wattage voltage or amperage.

I think you may have misunderstood the article.
The article shows a fans energy usage (in watts) that it takes to dissipate 10 degrees of heat at different RPMs. It speaks to the differences in this fans efficiency at doing this job at those different RPMs. In the conclusion, he derived that the fan is much more efficient in its lower RPMs, 600 rpm to be specific. To me, he was kind of vague about what he was trying to prove; so yes, we need to read between the lines. Reread the article with this perspective, It should clear some things up for you.
Edited by Luke Cool - 10/19/14 at 5:45pm
post #1814 of 2002
no. the tdp (heat output) of each component is measured in watts and totaled up. the amount of watts that can be dissipated is given in those charts.
for instance, my 2500k produces 95watts at stock theoretically. an r9 290x is roughly 290watt as reported by amd. a gtx980 is 165watts.

also, it isnt 10*C of heat dissipated. it is how much heat has been dissipated (removed) to be at a 10*C water temp/ambient temp delta.
Edited by pc-illiterate - 10/19/14 at 6:17pm
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post #1815 of 2002
Quote:
Originally Posted by pc-illiterate View Post

no. the tdp (heat output) of each component is measured in watts and totaled up. the amount of watts that can be dissipated is given in those charts.
for instance, my 2500k produces 95watts at stock theoretically. an r9 290x is roughly 290watt as reported by amd. a gtx980 is 165watts.

also, it isnt 10*C of heat dissipated. it is how much heat has been dissipated (removed) to be at a 10*C water temp/ambient temp delta.
The relationship between watts and heat is not a direct one;
there-fore, wattage is an extremely inaccurate way to measure heat.
The purpose of me asking for an equation was to show you this.
In the case of CPUs, some 95 watt CPUs during a 100% burn, run a lot hotter than others.
The reason for the difference is the hotter running CPU is not as efficient.
post #1816 of 2002
if you didnt want an answer, you shouldnt have asked.
for estimating cooling needs, it is a perfect way to to measure heat. the wattage the charts show as dissipated is not exact either.
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post #1817 of 2002
still got both my 2600ks running 4.7 ghz 1.385v for ever now and I still love them .... thumb.gif
post #1818 of 2002
how old are you? ever heard of tdp and you completely missed the point there is no fan wattage that is radiator heat dissipation

you have no idea of what are you talking about there
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post #1819 of 2002
Quote:
Originally Posted by Luke Cool View Post

The relationship between watts and heat is not a direct one;
there-fore, wattage is an extremely inaccurate way to measure heat.
The purpose of me asking for an equation was to show you this.
In the case of CPUs, some 95 watt CPUs during a 100% burn, run a lot hotter than others.
The reason for the difference is the hotter running CPU is not as efficient.


Seems that you lack the understanding that the 95 watt rating is current usage and completely unrelated to heat generation.
Edited by Mule928 - 10/20/14 at 7:47pm
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post #1820 of 2002
Quote:
Originally Posted by Lantian View Post

This should clear this up http://martinsliquidlab.org/2012/05/01/alphacool-nexxxos-st30-360-radiator/4/
comparison o different fan speed on 360mm rad, and the heat that can be dissipated with it at given speeds, and i would say differences are pretty dramatic

Excellent example.
Edited by Mule928 - 10/20/14 at 7:34pm
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