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Do Intel CPUS have an onboard temp sensor...
- Thread starter stan03
- Start date
The P4 has both an on chip thermal sensor and a thermal diode. These are very accurate, however the data they produce must be correctly interpreted by the motherboard. Some motherboards do not accurately read the temperature and you may need to add to or subtract from the reported value to get the correct temperature.
- Joined
- Oct 12, 2001
- Location
- Los Angeles
True, but as you mentioned there are 2 separate sensors, one we can monitor (if your board supports it, I know the Abit's do) and one we can not. The one we can monitor, is in a cool spot of the CPU, almost at the top surface of the die. The diode we can not read, is in a much hotter deeper part of the core and is as much as 40C hotter than the other diode. So even by reading the readable diode, we do not get a true indication of the real heat in the center of the core. Take temps with a grain of salt.NookieN said:
- Joined
- Jan 12, 2001
- Location
- Kansas, USA
Overclockers have gotten a feel for what "reported" temps are ok and what is starting to get too warm. Most of the time, as long as you don't go above low 50's load CPU temp you are fine. With that SLK900, you should be plenty cool.
- Joined
- Nov 19, 2003
A useful utility to monitor temps is Motherboard Monitor:
http://mbm.livewiredev.com
When you set up MBM, as long as your mobo is listed, it will automatically offset the temperature information with the known/tested variance for your motherboard, and you will get fairly accurate readings. It's also a great utility for monitoring voltages, fan speeds, and performing emergency shutdowns (with a free companion app) if your comp gets too toasty, your fans stop working, your rails get too high/low, etc.
Goliath
http://mbm.livewiredev.com
When you set up MBM, as long as your mobo is listed, it will automatically offset the temperature information with the known/tested variance for your motherboard, and you will get fairly accurate readings. It's also a great utility for monitoring voltages, fan speeds, and performing emergency shutdowns (with a free companion app) if your comp gets too toasty, your fans stop working, your rails get too high/low, etc.
Goliath
nikhsub1 said:
While it is true that the thermal sensor can give a much better picture of instantaneous heating within certain sections of the die, that is irrelevant to the needs of anyone browsing these forums. The thermal diode can accurately report the current CPU temperature as a trend over the last few seconds. Which is what you want anyway.
I routinely use thermal diode readings in a lab where I work to verify that a processor is at the temperature I'm forcing it to. I have yet to see a chip where the diode did not report the correct temperature (again, as a trend over a few seconds). Despite what some motherboard makers may claim, the on-chip diode is much better at measuring die temps than any in-socket probe or thermocouple.
- Joined
- Oct 12, 2001
- Location
- Los Angeles
You will get absolutely no argument from me! However, every board and every CPU do report differently, even if the same make/model. All I am saying is that there is really no way to get a 'true' temp of a CPU. What is reported is a good guide, and some are more accurate than others, but I doubt we ever see a core's absolute temp.NookieN said:
OP
- Joined
- Mar 30, 2003
- Thread Starter
- #11
ok, well i wasn't actually looking for the core temp. When we say oh, don't let it go above 50 its a basis for some judgement even if that temp is only for the heatspreader or something. Im trying to overclock and i can't seem to get stable past 3.1. It might be my RAM but im wondering if its my temps or something else
- Joined
- Oct 12, 2001
- Location
- Los Angeles
stan03, some boards just read much higher, take Abit for example. They seem to read 15 - 20C higher than the Asus boards. Do you know if the Gigabyte reads the on die reading or is it an insocket thermistor? For the Abit boards, I would say up to 60C is OK, for the Asus boards 50C is a bit hot. For your board, I do not knowstan03 said:
- Joined
- Oct 12, 2001
- Location
- Los Angeles
Right, the 8RDA's do that too and the temps are whacked. If that pin is sending the on-die signal, well then it is on die. Do you have MBM5 installed? If so, change the interval at which MBM5 works to 1 second from 10. Then, from idle, load the machine with P95 or something similar. If the temps jump up IMMEDIATLY, that would tell me it is an on die reading. If it is slow to react, then it is not.stan03 said:
- Joined
- Oct 12, 2001
- Location
- Los Angeles
On Die.Sniper_83 said:
- Joined
- Oct 12, 2001
- Location
- Los Angeles
Launch MBM5 Settings... It will take you to the Basic General page... 4th option down.stan03 said:
whoa, what? im slow
