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fixed: AIDA64 uses "wrong" source for CPU fan RPM value (Asus U32U)


Alexey
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Hello,

I'm trying out and evaluating AIDA64, looks like an excellent all-rounder!

My hardware is an old laptop ASUS U32U.

However I noticed that CPU FAN rpm value is using the "wrong" source. Here is part of the ISA Sensor dump:

_TZ_.RFAN(0)               : <TYPE>0</TYPE><LEN>4</LEN><DATA>31</DATA>
_TZ_.RFAN(1)               : <TYPE>0</TYPE><LEN>4</LEN><DATA>31</DATA>
_SB_.ATKD._HID             : <TYPE>1</TYPE><LEN>8</LEN><DATA>pnp0c14</DATA>
_SB_.ATKD.TMPR             : <TYPE>0</TYPE><LEN>4</LEN><DATA>2034968</DATA>
_SB_.PCI0.LPC0.EC0_.CCTV   : 
_SB_.PCI0.LPC0.EC0_.LRPM   : 
_SB_.PCI0.LPC0.EC0_.HRPM   : 
_SB_.PCI0.SBRG.EC0_.ECPU   : <TYPE>0</TYPE><LEN>4</LEN><DATA>62</DATA>
_SB_.PCI0.SBRG.EC0_.TACH(0): <TYPE>0</TYPE><LEN>4</LEN><DATA>4294967295</DATA>
_SB_.PCI0.SBRG.EC0_.TACH(1): <TYPE>0</TYPE><LEN>4</LEN><DATA>4294967295</DATA>

Firstly I manually set the CPU fan to fully stop, wait for it to spin down completely.

AIDA64 uses the reading from _TZ_.RFAN(0) = 31, which shows up as 3100rpm.

Whilst the correct value should be read from _SB_.PCI0.SBRG.EC0_.TACH(0) whose current value is 4294967295, which is 0, the correct value.

Using SpeedFAN and HWinfo, I can see the "correct" value.

I understand that there might be a bug in my motherboard's EC or ACPI table, cauing the method RFAN to return erratic values. My question is that, is it possible to customize AIDA64 to use the desired readout (TACH(0)) from ACPI?

Full isasensordump is attached below.

Thanks!

isasensordump_2.txt

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4 hours ago, Alexey said:

Hello,

I'm trying out and evaluating AIDA64, looks like an excellent all-rounder!

My hardware is an old laptop ASUS U32U.

However I noticed that CPU FAN rpm value is using the "wrong" source. Here is part of the ISA Sensor dump:

_TZ_.RFAN(0)               : <TYPE>0</TYPE><LEN>4</LEN><DATA>31</DATA>
_TZ_.RFAN(1)               : <TYPE>0</TYPE><LEN>4</LEN><DATA>31</DATA>
_SB_.ATKD._HID             : <TYPE>1</TYPE><LEN>8</LEN><DATA>pnp0c14</DATA>
_SB_.ATKD.TMPR             : <TYPE>0</TYPE><LEN>4</LEN><DATA>2034968</DATA>
_SB_.PCI0.LPC0.EC0_.CCTV   : 
_SB_.PCI0.LPC0.EC0_.LRPM   : 
_SB_.PCI0.LPC0.EC0_.HRPM   : 
_SB_.PCI0.SBRG.EC0_.ECPU   : <TYPE>0</TYPE><LEN>4</LEN><DATA>62</DATA>
_SB_.PCI0.SBRG.EC0_.TACH(0): <TYPE>0</TYPE><LEN>4</LEN><DATA>4294967295</DATA>
_SB_.PCI0.SBRG.EC0_.TACH(1): <TYPE>0</TYPE><LEN>4</LEN><DATA>4294967295</DATA>

Firstly I manually set the CPU fan to fully stop, wait for it to spin down completely.

AIDA64 uses the reading from _TZ_.RFAN(0) = 31, which shows up as 3100rpm.

Whilst the correct value should be read from _SB_.PCI0.SBRG.EC0_.TACH(0) whose current value is 4294967295, which is 0, the correct value.

Using SpeedFAN and HWinfo, I can see the "correct" value.

I understand that there might be a bug in my motherboard's EC or ACPI table, cauing the method RFAN to return erratic values. My question is that, is it possible to customize AIDA64 to use the desired readout (TACH(0)) from ACPI?

Full isasensordump is attached below.

Thanks!

isasensordump_2.txt

Does TACH(0) always provide the correct RPM when your fan is spinning at various non-zero RPMs?

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8 minutes ago, Fiery said:

Does TACH(0) always provide the correct RPM when your fan is spinning at various non-zero RPMs?

Thanks for the timely reply!

Yes, I can comfirm that by listening to the fan and watching the numbers in HWiNFO. And TACH(0) seems to provide the RPM number with more precision.

Also maybe due to some bug in my model's EC/ACPI imp'l, _TZ_.RFAN(0) tend to jump erratically, ranging from 100 to several tens of thousands, so I would like to know is there a way to customize AIDA64's reading a bit.

Thanks!

Edited by Alexey
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  • 2 weeks later...
On ‎5‎/‎9‎/‎2019 at 1:30 PM, Alexey said:

Thanks for the timely reply!

Yes, I can comfirm that by listening to the fan and watching the numbers in HWiNFO. And TACH(0) seems to provide the RPM number with more precision.

Also maybe due to some bug in my model's EC/ACPI imp'l, _TZ_.RFAN(0) tend to jump erratically, ranging from 100 to several tens of thousands, so I would like to know is there a way to customize AIDA64's reading a bit.

Thanks!

Please check the latest update about fan RPM measurement:

https://www.aida64.com/downloads/latesta64xe

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1 hour ago, Alexey said:

Thanks for the speedy response, I've tested this latest build and indeed the rpm readout is now the desired one. Thanks for the amazing product!:)

Thank you for your feedback and for your kind words ;) 

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