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Science Fair Questions


bobbyt2012
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Hi All,

 

I am going to be doing a science fair project on the effects of temperature on electron mobility by cooling my CPU with several different methods of cooling including Dry Ice and LN2. I have a few questions, and I'm sure more will come up. The most pertinent question right now is how low will the built in thermometers go that display the temperature in CoreTemp? I have an AMD Phenom II x4 940 BE. I'm in high school, and I don't really have a whole lot of spending money. I'm buying an evaporator from Koolance (CPU-LN2), unless you guys know of a better one for less money.

 

I'm working on getting a large array of relatively quick CPU tests for my experiments. The ones that I have come up with so far are: SuperPI to 4mil, Cinebench for Single Core and Multi, 3dMark06 CPU Tests Only, 3dMark Vantage CPU Tests only, and possibly 1 minute in Prime95 for stability only.

 

Bob

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Hi All,

 

I am going to be doing a science fair project on the effects of temperature on electron mobility by cooling my CPU with several different methods of cooling including Dry Ice and LN2. I have a few questions, and I'm sure more will come up. The most pertinent question right now is how low will the built in thermometers go that display the temperature in CoreTemp? I have an AMD Phenom II x4 940 BE. I'm in high school, and I don't really have a whole lot of spending money. I'm buying an evaporator from Koolance (CPU-LN2), unless you guys know of a better one for less money.

 

I'm working on getting a large array of relatively quick CPU tests for my experiments. The ones that I have come up with so far are: SuperPI to 4mil, Cinebench for Single Core and Multi, 3dMark06 CPU Tests Only, 3dMark Vantage CPU Tests only, and possibly 1 minute in Prime95 for stability only.

 

Bob

 

You can read the Core Temp documentation here:

 

Core Temp home:

http://www.alcpu.com/CoreTemp/

 

How Core Temp works:

http://www.alcpu.com/CoreTemp/howitworks.html

 

 

[Documentation Quote]

"AMD chips report the temperature by a special register in the CPU's NB. Core Temp reads that register and uses a formula provided by AMD to calculate the current temperature.

The formula for the K8 is: 'Core Temp = Value - 49'.

The formula for the K10* is: 'CPU Temp** = Value / 8'.

 

The sensor in AMD CPUs can report temperatures between -49C and 206C.

 

*K10 = Phenom (Agena), Opteron (Barcelona). The K10 reports a temperature value that is relative to a certain predefined value, it doesn't report the actual processor temperature! So take that into consideration.

**CPU Temp is because the Phenom\Opteron (K10) have only one sensor per package, meaning there is only one reading per processor".

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The most pertinent question right now is how low will the built in thermometers go that display the temperature in CoreTemp?

 

About -60C IIRC. You will need a digital thermometer for accurate readings.

 

I assume you are aware that you will need proper insulation on the motherboard. Don't forget LN2 is relatively expensive and evaporates quickly so it's also a lot easier to have a partner

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