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CPU Cores below ambient room temp?

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  • Core Temp
  • CPUs
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a c 404 à CPUs
September 12, 2014 10:05:20 AM

Can a Corsair C60 AIO liquid cooler actually chill an FX-8350 at idle to where the core temp is below ambient?
At idle, HWinfo and Core Temp show the CPU temp at ~9.0C
AMD Overdrive shows the Cores thermal margin at 62.5C

Assuming CPU / Core offset of + 5C, that would make the core temp ~14C.
Therm Margin: 62.5C
+ Core Temp: 14.0C
----------------------------
=========76.5C

(Room temp is ~23C)

More about : cpu cores ambient room temp

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a c 84 à CPUs
September 12, 2014 10:27:54 AM

clutchc said:
Can a Corsair C60 AIO liquid cooler actually chill an FX-8350 at idle to where the core temp is below ambient?
At idle, HWinfo and Core Temp show the CPU temp at ~9.0C
AMD Overdrive shows the Cores thermal margin at 62.5C

Assuming CPU / Core offset of + 5C, that would make the core temp ~14C.
Therm Margin: 62.5C
+ Core Temp: 14.0C
----------------------------
=========76.5C

(Room temp is ~23C)


AMD changed to a temperature sensor algorithm in most current CPUs. It can be misleading at low temps and not quite accurate at high temps. As long as you are well below thermal limits and your CPU socket temp only shows 5-10c warmer than the CPU core you should be OK.
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a b à CPUs
September 12, 2014 10:34:12 AM

thats weird If the CPU temps gets lower than the ambient room temps then water droplets may form on the cpu due to condensation .
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a c 404 à CPUs
September 12, 2014 10:36:19 AM

Thanks for the reply, but my question was can the Corsair C60 AIO chill the CPU so much that the cores are actually below room temp? I guess the answer is NO.
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a b à CPUs
September 12, 2014 10:45:32 AM

The answer should be NO if its a nitrogen or helium cooler then there may be a chance but simple water cooler no way.
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a c 404 à CPUs
September 12, 2014 11:02:19 AM

What does Corsair circulate through their AIO coolers, water and glycol or just distilled water?
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a c 192 à CPUs
September 12, 2014 1:57:53 PM

clutchc said:
Thanks for the reply, but my question was can the Corsair C60 AIO chill the CPU so much that the cores are actually below room temp? I guess the answer is NO.


No. As nice as Corsair is, they as a company still need to obey the laws of thermodynamics. There are only a few ways to cool a heat generating component below ambient temperature:

1. Peltier Effect. This is used in thermoelectric cooling. It is quite electrically inefficient as a significant amount of energy is used to cool the heat generating component, and all of it must be removed.

2. Refrigeration. There are a number of different refrigeration techniques, but the most popular for PCs is phase change cooling. Phase change cooling takes advantage of the enthalpy of vaporization to rapidly change the temperature of the coolant by compressing it into a liquid (releases energy into the environment in the form of heat), cooling the hot liquid, and then allowing it to expand into a gas (absorbing energy from the environment in the form of heat). Phase change coolers are extremely expensive, but require little maintenance or upkeep once installed.

3. Cryogenic cooling. A precooled extremely low temperature liquid such as liquid nitrogen or liquid helium is used in combination with a large pot style heat sink. The liquid absorbs energy from the environment and evaporates over time. The liquid must be replaced periodically so cryogenic cooling is not suitable for regular use.

4. Geothermal cooling. This is essentially just good old fashioned liquid cooling with the radiator located in a cooler environment, or with liquid piped in from elsewhere. It's theoretically possible but incredibly stupid as it can cause condensation.
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a c 404 à CPUs
September 12, 2014 2:07:58 PM

Pinhedd said:
clutchc said:
Thanks for the reply, but my question was can the Corsair C60 AIO chill the CPU so much that the cores are actually below room temp? I guess the answer is NO.


No. As nice as Corsair is, they as a company still need to obey the laws of thermodynamics. There are only a few ways to cool a heat generating component below ambient temperature:

1. Peltier Effect. This is used in thermoelectric cooling. It is quite electrically inefficient as a significant amount of energy is used to cool the heat generating component, and all of it must be removed.

2. Refrigeration. There are a number of different refrigeration techniques, but the most popular for PCs is phase change cooling. Phase change cooling takes advantage of the enthalpy of vaporization to rapidly change the temperature of the coolant by compressing it into a liquid (releases energy into the environment in the form of heat), cooling the hot liquid, and then allowing it to expand into a gas (absorbing energy from the environment in the form of heat). Phase change coolers are extremely expensive, but require little maintenance or upkeep once installed.

3. Cryogenic cooling. A precooled extremely low temperature liquid such as liquid nitrogen or liquid helium is used in combination with a large pot style heat sink. The liquid absorbs energy from the environment and evaporates over time. The liquid must be replaced periodically so cryogenic cooling is not suitable for regular use.

4. Geothermal cooling. This is essentially just good old fashioned liquid cooling with the radiator located in a cooler environment, or with liquid piped in from elsewhere. It's theoretically possible but incredibly stupid as it can cause condensation.


Lol... yeah, I guess that was kind of a dumb question. That's why I wondered if they used some kind of coolant that was at a lower temp than ambient air and it was able to take the surface temp down (and hence the cores) below room temp as it came in contact. But now that I think about it, that would be impossible.

I guess it is just the screwed up sensors that maddogfargo alluded to that makes the direct temp reading screwy. The Athlon II/Phenom II processors were so easy to watch temps. Now we have to use AOD and go by thermal margin for an AMD processor. AMD seems to be going backwards.
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a c 192 à CPUs
September 12, 2014 2:14:36 PM

clutchc said:
Pinhedd said:
clutchc said:
Thanks for the reply, but my question was can the Corsair C60 AIO chill the CPU so much that the cores are actually below room temp? I guess the answer is NO.


No. As nice as Corsair is, they as a company still need to obey the laws of thermodynamics. There are only a few ways to cool a heat generating component below ambient temperature:

1. Peltier Effect. This is used in thermoelectric cooling. It is quite electrically inefficient as a significant amount of energy is used to cool the heat generating component, and all of it must be removed.

2. Refrigeration. There are a number of different refrigeration techniques, but the most popular for PCs is phase change cooling. Phase change cooling takes advantage of the enthalpy of vaporization to rapidly change the temperature of the coolant by compressing it into a liquid (releases energy into the environment in the form of heat), cooling the hot liquid, and then allowing it to expand into a gas (absorbing energy from the environment in the form of heat). Phase change coolers are extremely expensive, but require little maintenance or upkeep once installed.

3. Cryogenic cooling. A precooled extremely low temperature liquid such as liquid nitrogen or liquid helium is used in combination with a large pot style heat sink. The liquid absorbs energy from the environment and evaporates over time. The liquid must be replaced periodically so cryogenic cooling is not suitable for regular use.

4. Geothermal cooling. This is essentially just good old fashioned liquid cooling with the radiator located in a cooler environment, or with liquid piped in from elsewhere. It's theoretically possible but incredibly stupid as it can cause condensation.


Lol... yeah, I guess that was kind of a dumb question. That's why I wondered if they used some kind of coolant that was at a lower temp than ambient air and it was able to take the surface temp down (and hence the cores) below room temp as it came in contact. But now that I think about it, that would be impossible.

I guess it is just the screwed up sensors that maddogfargo alluded to that makes the direct temp reading screwy. The Athlon II/Phenom II processors were so easy to watch temps. Now we have to use AOD and go by thermal margin for an AMD processor. AMD seems to be going backwards.


Yup. Intel uses a Digital Thermal Sensor (calibrated using a thermocouple at the factory), but I have no idea what AMD uses.
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