Difference in temps using CPUID vs Speed Fan

I have a HP Pavilion laptop (Dv7 Core Duo P7550 ) and I have been using speed fan to monitor the temperature. When gaming it was getting near 65C and the fan sounded like a jet engine. I turned down the processor speed via the Vista power controls to 80% of max and saw a big difference. The fan runs much slower and the temps rarely go above 55. And I didn't see any problem with performance.

However the latest speedfan can monitor GPU temps as well, but not for ATI currently so I went looking and found the CUPID hardware monitor( CPUID - System & hardware benchmark, monitoring, reporting) which does show all the different temps. But I was surprised to see a large difference in temp displayed! CPUID shows (using the same game) 65C normal and sometimes hits 70 for a second. Which one should I believe?

 

Hmm no one has ran into this before?

 

All programs are just giving you their best guess.

Even the most 'accurate' program is limited by the actual physical placement of the sensor of the component being measured.

So, which one to believe? I would 'believe' the higher one - and take the appropriate actions:

1) use a notebook cooler
2) repaste the cpu/gpu with a quality thermal paste (and quality application too)
3) undervolt the cpu/gpu to reduce temps
4) turn down game settings to stress gpu less

Hope some of this helps?

 

i wouldn't believe speedfan.. its more inaccurate and really for desktops.. trust CPUID.. and trust me , ur Dv5t temps are low... mine hits 80C easily under gaming... and the fan is loud...

 

Probably your CPU_0_TJMAX in your "hwmonitorw.ini" file (in your "CPUID\HWMonitor" folder) is set wrong. The TJMax of the P7550 is only 90 degrees Celsius, which throws off the reading a bit. This is assuming that the temperatures you're talking about is for the CPU, of course.

 

HWMonitor has a tendency to display 10 degreec C higher temps on cpu's that have a TJMax of 90 deg C.
It does the same thing on my P7350.

65 deg C under load is nothing to be concerned about though (you are overreacting).
Mine regularly got to 80 deg C (before undervolting).

 

Thank you everyone, very very interesting indeed. I would seem that the general concensus is the temps are ok (which I thought as well but I do know that heat is a killer of electronics so I want to have it as low as possible).

@ Tiller
1) use a notebook cooler ---I already do
2) repaste the cpu/gpu with a quality thermal paste (and quality application too) --possibly but this unit is still under warnanty and I don't wish to open it at this point
3) undervolt the cpu/gpu to reduce temps --already have though the power controls in Vista
4) turn down game settings to stress gpu less -- I did that as well during my testing. Although later on raised them back up to see little difference

@ Judicator and Deks
I was thinking the same thing actually and the reason why I posted. I looked up the TJMax setting and it is currently set for 100. What should the setting be (90)? Also what is the TJMax exactly? I assume it is a calibration setting?

Again thanks everyone for posting.

 

Yes, change the value to 90, because the TJMax for your specific processor (P7550) is 90. The TJMax is the temperature that is the highest that your processor is rated to run at ( Thermal Junction Maximum). This varies by processor (usually by family), but usually runs from 90 to 105. The reason this can throw off readings in programs like HWMonitor is that the temperature sensors in your CPU don't actually give out readings in degrees, instead it's a value calibrated to the range that the processor is designed to run through (thus you can have your CPU always shut off at a value of, say, 1, whether or not your CPU is designed to shut off at 90 degrees or 150). HWMonitor is not "smart" enough to detect the CPU you're using, and thus just goes with a generic value of 100, which is usually close enough not to matter for most cases. Speedfan, along with some other programs, actually detects which CPU you're using, and compares it to its internal database to determine the correct TJMax.

 

gamemaster337, just note that your version of undervolting is different than what I meant.

Yours actually limits how much of your cpu you can use, while what I have in mind will give you full power at lower temps.

Search for the UnderVolting guide...

Actually, see here:

See:
http://forum.notebookreview.com/har...arket-upgrades/235824-undervolting-guide.html


Glad to have helped (a little).