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Core temp, realtemp etc.
- Thread starter jmartis
- Start date
"A man with one watch always knows the time. A man with two watches is never sure."
74.1C would be your thermal spec. So you want to keep Tcase under that. I would say you shouldn't exceed 70C to be safe. That would cover inaccuracies in the Tcase sensor.
The actual Tjmax for most 45nm Intel CPUs (except for the QX9650 and QX9770) is 100C as was released by Intel yesterday. If you manually set it to that number in Real Temp or Core Temp, you'll get the most accurate reading possible from the DTS.
Case at 74C? Talk about cooking hard drives! I think I've never seen any case to get over 40-50C ever...faugusztin
2[H]4U
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- Mar 9, 2008
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Well, not exactly the true temperature. The problem is that with bigger distance from TjMax you are getting the values with bigger and bigger error (in other words, if you make a straight line for temperature, then the DTS reporting can be anywhere in triangle which have it's most correct spot at Tjmax, and with lower temperatures the error increases). But using 100C for 45nm processors are best result you can get for now.
That's why I said the most accurate reading possible from the DTS instead of saying that you'll get the actual temperature
. I'm aware that the DTS isn't entirely accurate, but it's the best way we have to measure temps save for drilling a channel into the heatspreader and sticking in a thermal diode like the [H] and Intel do it .faugusztin
2[H]4U
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No, your P4 Prescott doesn't have accurate temp reading. DTS in all Intel processors are same - used for shutdown in case of overheating. Fact, that you can read it's value and present it as a temperature is just a side effect.
The P4 used an old thermal diode, which worked in a different way. There was less temperature variations with the old diodes, however the new DTSes that Intel uses are far more accurate when it comes to their actual purpose, which is to send the PROCHOT signal if Tjmax is reached. The farther away from Tjmax the temperature is, the higher the error; however, at Tjmax the DTS is far more accurate than a thermal diode. They're not designed to provide accurate temperature readings.