CPU cooling/Ambient Air temperature debate

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DarthFaderZ

DarthFaderZ

Honorable
Oct 27, 2013
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Guys on reddit are throwing a fit and several people will here as well I feel. But explain to me that if its impossible to get cooling lower than ambient how my CPU whilst at idle - idles below it?

dppN2aH.jpg

during that picture was 76F in my living room

http://i.imgur.com/BRUEIIv.png
72F during this one.

http://i.imgur.com/HoA3pny.jpg
is the system

I have 4 fans pushing air in, 1 80mm 2 120mms and 1 40mm

3 pushing out 2 40mm through radiator, and anoth 120mm on top pulling through radiator
 
Solution
Gam3r01
Many of the FX series processors give false readings at low temps.

It IS impossible to get lower than ambient temperatures unless you have some sort of active heat exchange, ie liquid nitrogen.
Passive systems such as heatsinks cant do it.
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Gam3r01

Gam3r01

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Jan 12, 2013
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Many of the FX series processors give false readings at low temps.

It IS impossible to get lower than ambient temperatures unless you have some sort of active heat exchange, ie liquid nitrogen.
Passive systems such as heatsinks cant do it.
 
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Solution
Gam3r01

Gam3r01

Titan
Jan 12, 2013
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It dosent matter what the readings go through, the sensor is not accurate under a certain temperature. You fall below it, you cant trust the readings.
The air exhausting is simply moving and seems cooler, unless you somehow are managing to put heat INTO your processor.
 
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synphul

synphul

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Mar 11, 2011
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The air isn't colder blowing out of your case, what you're feeling is 'wind chill' which is a perceived temperature difference created by air/wind moving past your hand. It doesn't affect inanimate objects.

Here's a good explanation. "The effect of wind chill is to increase the rate of heat loss and reduce any warmer objects to the ambient temperature more quickly. It cannot, however, reduce the temperature of these objects below the ambient temperature, no matter how great the wind velocity."
http://en.wikipedia.org/wiki/Wind_chill

Another factor could be false readings as people have mentioned. Another explanation is that there's going to be a variance in accuracy from even a relatively accurate cpu thermometer and whatever other thermometer was used as your source for 'ambient'. I have two thermometers from the same manufacturer (accurite) and they can vary by as much as 10 degrees in the same room. Also not all areas of a room are exactly the same temperature. There are warmer and cooler pockets.
 
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Nitro192

Nitro192

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Jul 7, 2013
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It's true, its not the "cooling" effect of the air moving quicker that cools it, it's that there is air displacement. That hot air doesn't propagate around the hardware. There should be a constant flow of air going over the motherboard and even under the CPU cooler. Then being exhausted out the back and top. I lost two motherboards to overheating because of improper cooling.
 
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