cpu and case temps expectations

[KenG]

What is a reasonable cpu temp for a PIII 700 @ 933 using just HS/F? I'm getting 43 C running seti, 37.5 at rest. O/C'ing only increases the temps a degree or two. AND both HW Doctor and MBM 4 show the system temp to be around 3 degrees HIGHER than the cpu ???????? (room temp 22 C)

Abit SE6, Alpha PAL w/Sunon 23 cfm sucking fan, Arctic silver, Fong Kai case

 

[tonyou]

I don't know if I am right about this, but I think the system temperature readings are from the motherboard chipset. This may explain why it is 3 degrees higher than your Alpha cooled CPU.

Tony

 

[pyr]

Im running the same thing... CPU with the Stock heatsink (!) is running about 120 (50C) which I find to be somewhat of a shock. That seems abnormally low for how high this is clocked and the fact that the retail HS is supposed to really suck!

 

[MagnusPAH]

The temperatures you guys are reporting mean little unless you state where the temperature probes are located. If a thermistor is on the core itself then that would be more accurate and higher in temperature than one that was placed on the motherboard next to the core. Unfortunately most temperatures given by the motherboard indicating core temperature are actually temperatures taken at areas about .5in away from the core itself. This gives the user a false sense of security. For example, the Epox KX133 motherboard (for an Athlon) has a core thermistor (based on the BIOS readings) that reports the temperature of the core. When I used to have that board on with my Athlon 750 overclocked to 935Mhz, the thermistor was registering 98F at full-load. However, when I take a look at where the thermistor was located, I saw that it was on the motherboard, about .5in away from the actual core and was almost touching the heatplate of the PCB. Because of this, the temperature was registering so low (I had a massive array of fans and an Alpha P7125 cooling the chip). So I went out and bought a thermistor from radioshack and put it on the core itself. At full load, the thermistor with the correct readings was now registering a hot 122F.
So when you are talking about temperatures, it is possible that some of you have higher temperatures than others although you might have the same chip and cooling, was because of where the thermistors on your motherboards are located.

 

[KenG]

The ABIT board has a plug for thermisters, but none are included. I am under the impression that MBM and HW doctor get the temps straight from the chip(s) somehow.