different temp reading on different software

[Smackaroy]

so i was doing a stress test and hwinfo read my temps where 64C but on my motherboards utilty software ai suite 3 (asus program) read my temps where 55 9C difference what software should i trust?

  

[nick name]

They may have been reading different sensors.  I also wouldn't use both at the same time as they may interfere with each other.  I honestly wouldn't use AI Suite at all.  

[Smackaroy]

Just now, nick name said:

They may have been reading different sensors.  I also wouldn't use both at the same time as they may interfere with each other.  I honestly wouldn't use AI Suite at all.  

ok thanks

[dalekphalm]

Some programs also have a temperature off-set (sometimes adjustable, sometimes hardcoded) - this is because some sensors are off-set themselves and don't report an accurate number unless you adjust the reading (example, reports 10C too high and needs to be adjusted down), so that could be at play here too.

 

I would try booting into the BIOS and try and get some readings in there, then compare those readings to both AI Suite and HWINFO and see which one matches the BIOS readings. The only problem there is that CPU load will affect your temps - so try and keep the system as idle as possible to try and match the CPU load during the BIOS.

[nick name]

4 minutes ago, dalekphalm said:

Some programs also have a temperature off-set (sometimes adjustable, sometimes hardcoded) - this is because some sensors are off-set themselves and don't report an accurate number unless you adjust the reading (example, reports 10C too high and needs to be adjusted down), so that could be at play here too.

 

I would try booting into the BIOS and try and get some readings in there, then compare those readings to both AI Suite and HWINFO and see which one matches the BIOS readings. The only problem there is that CPU load will affect your temps - so try and keep the system as idle as possible to try and match the CPU load during the BIOS.

I wouldn't bother trying to use BIOS to compare values.  BIOS runs the CPU in a different way than idle in Windows.  

[dalekphalm]

1 minute ago, nick name said:

I wouldn't bother trying to use BIOS to compare values.  BIOS runs the CPU in a different way than idle in Windows.  

True - but it should be fairly similar to idle temps. The CPU is essentially idle while in the BIOS (there's a low level load, but not much of one). When idle in Windows - as long as you don't have a lot of bloatware running, it should come pretty close to BIOS temps.

[nick name]

1 hour ago, dalekphalm said:

True - but it should be fairly similar to idle temps. The CPU is essentially idle while in the BIOS (there's a low level load, but not much of one). When idle in Windows - as long as you don't have a lot of bloatware running, it should come pretty close to BIOS temps.

It appears he is using a 8700K so perhaps it behaves differently in BIOS, but something like a 2700X certainly isn't close to idle Window temps while in BIOS.  BIOS throws a lot of voltage at the CPU.  Mine sits at something like 20*C higher in BIOS than idle in Windows.  

[dalekphalm]

22 minutes ago, nick name said:

It appears he is using a 8700K so perhaps it behaves differently in BIOS, but something like a 2700X certainly isn't close to idle Window temps while in BIOS.  BIOS throws a lot of voltage at the CPU.  Mine sits at something like 20*C higher in BIOS than idle in Windows.  

Why would your CPU be getting that much extra voltage when it's not doing anything? Seems like a design fault to me.

[Mick Naughty]

I deal with the same issue. So when mine is under load I just add 10c to it. Not like it’s running at 100c so it isn’t a big deal. I prefer to have one program up so the ASUS suite is still my go to as I can see my whole system to a point and that’s enough. 

[local god]

I noticed the same thing and came to the following conclusion:

Different apps address different temperature sensors.

 

Some apps address the CPU onboard thermometer (giving a true core-temperature), others the MB sensor (which sits very close to the core, but isn't actually in it).

 

Since your cooler/CPU interface is actually the same physical distance from the core as the MB sensor, the temperature (in general) is going to be lower at it than at the CPU sensor.

 

Thermal throttling will happen according to your CPU sensor, while fans are generally controlled by the MB sensor, and yeah - ~10 degrees is the difference that I've noticed...

[Smackaroy]

3 hours ago, local god said:

I noticed the same thing and came to the following conclusion:

Different apps address different temperature sensors.

 

Some apps address the CPU onboard thermometer (giving a true core-temperature), others the MB sensor (which sits very close to the core, but isn't actually in it).

 

Since your cooler/CPU interface is actually the same physical distance from the core as the MB sensor, the temperature (in general) is going to be lower at it than at the CPU sensor.

 

Thermal throttling will happen according to your CPU sensor, while fans are generally controlled by the MB sensor, and yeah - ~10 degrees is the difference that I've noticed...

the asus program reads the mother board senor and the cpu one

[Robchil]

The sensors are the same, just the asus sofware polls every ca 5 sec to not tax the system too much. hw info are live updated.. 

 

[Mick Naughty]

50 minutes ago, Robchil said:

The sensors are the same, just the asus sofware polls every ca 5 sec to not tax the system too much. hw info are live updated.. 

 

So why would never read the same if just the poling rate was different?

[Robchil]

5 hours ago, Mick Naughty said:

So why would never read the same if just the poling rate was different?

look at the package temp. ..  edit

 

 

doh.. scroll further down to your mainboard in hw info.. had to look myself .. there are cpu temps there too that match asus AI suite better.