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A couple of Q's regarding MSI K7T266 PRO2 - Temp measurements & ......

E

ErikS

Senior member
minimum fan speed (to aviod that annoying D-led crap)? I have my Enermax PS fan hooked up to the MB CPU header & the alarm still goes off. I've checked & it is spinning at boot (i.e. slowly), anyone know the minimum speed to avoid the alarm? Also, why the hell can't MSI give us the option to diable the damn thing (w/o removing the D-LED) :disgust:

First of all doesn anyone know exactly how the board measures CPU temp. I didn't notice any thermal diode (ala Abit) in the middle of the socket, so where is it? Second how does that Alert III software calculate temp? Does it use an algorithim? The reason I mention it is because it seems pretty dam accurate. I have a thermal probe (enermax) under the HSF (Alpha8045) and it rests against the side of the CPU. At idle (1.2 T-bird running @ 1350/1.825v) the software & the probe are within a degree C. Probe is about 35 & Alert III is 35.8. This holds true right up to the max temp. Alert will show 48c & the probe will be 46.8 (still close). Has anyone else tested this?

I used "Toast" crank the heat up on the CPU, it does a better job than anything else I've found for pure CPU heat. Three hours of quake III get me to 42c.

 
MSI probably went back to using a SMD resistor in the base, and then using some formula to calculate cpu temp.

Compared to your side temps readings, they may be "close" but remember that side-temp readings often are only 50-75% of cpu temp rise over ambient.... that being said, it is at least a bit better than most socket-thermsitor setups.



mike
 
Thanks Mike, I was hoping you'd chime in on this thread. I was suprised by how close the damn thing was - lol - I almost regretted installing the probe. I've been using the software for laughs & going by the probe. It's right up against the side of the CPU, not perfect but it's the best I could do.

It seems who ever wrote the algorithim did a decent job, though just as you said the farther from ambient you get the greater the deviation.

You are also right about those !@#$%^ socket themosistors, the one on my Abit board was off by as much as 14c at peak loads.
 
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