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In-Socket Thermister Accuracy Discovery...

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WyrmMaster

I'm a little teapot Senior
Joined
Dec 17, 2000
Location
Montana, USA
I have discovered that my in socket temp sensor is not as inacurate as everybody thinks, it just needs alittle help. MBM reads quite a bit higher than the temp i get when i calcuate based on my heatsinks c/w. Today i taped an 80mm fan to the back of my mobo tray so that it blows on the back of the board. This lowered my CPU temp to 35c full load, and my calculations based on a c/w of .22 for my Gladiator would put the temps at 36c, these are all with room temp of 24c. Take into account that i am cooling the back of the board and therefore the chip, the thermister is displaying the exact temp it should.
 

Colin

Arctic Silver Senior
Joined
Dec 19, 2000
And there in you describe the basic problem. The socket thermistor is a secondary heat path. By cooling the back of the motherboard, the temps read by the socket thermistor are lower.

Try measuring the interior temperature of a piece of meat in an oven accurately from the surface. You can't, that's what meat thermometers are for.
 

KaHNZa

Senior Member
Joined
Feb 13, 2001
Location
West Central MN
you are mostly just cooling your thermistor with the fan on the backside of the mobo. Remember, the thermistor is connected to the mobo right there were you have the fan pointed. The only way to get a true temp reading is to have an on-die temp. Like the Palomino will have. I don't really monitor my temps. I know they are fine with my Glaciator. And if my proc doesn't like whats happening, my computer just reboots.
 
OP
WyrmMaster

WyrmMaster

I'm a little teapot Senior
Joined
Dec 17, 2000
Location
Montana, USA
I understand that, but what im saying is that it droped to, and stabilized at, the exact temp that i had calculated. It was then reporting the true temp of the CPU, unless radiat calculated it wrong.
 

Colin

Arctic Silver Senior
Joined
Dec 19, 2000
All motherboards have some compenstation for the socket thermistor. I wish there were but there is no way to get around the secondary heat path issue.