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Lm-sensors configuration for ASRock Z690 Extreme motherboards on Linux

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asrock_z690_extreme

Lm-sensors configuration for ASRock Z690 Extreme and ASRock Z690 Extreme WiFi 6E motherboards on Linux.

Warning: this configuration is hardware dependent, it can work properly only on this motherboard! You have to modify the configuration file if you want to use it on a different hardware.

Updates:

  • [June 10, 2022]: The configuration file has been forwarded to lm-sensors project
  • [October 24, 2022]: In the queue, waiting for merge

The motherboard

ASRock used Nuvoton NCT6796D-E super I/O chip (SIO) on Z690 Extreme motherboards to control multiple fans, temperature sensors and voltage lines.

Nuvoton NCT6796D-E

Read more details about the motherboard in the review of pcinq.com.

lm-sensors

The sensors-detect command in the lm-sensors package can identify the SIO chip slighly differently:

Some Super I/O chips contain embedded sensors. We have to write to
standard I/O ports to probe them. This is usually safe.
Do you want to scan for Super I/O sensors? (YES/no):
Probing for Super-I/O at 0x2e/0x2f
Trying family `National Semiconductor/ITE'... No
Trying family `SMSC'... No
Trying family `VIA/Winbond/Nuvoton/Fintek'... Yes
Found `Nuvoton NCT6798D Super IO Sensors' Success!
    (address 0x2a0, driver `nct6775')
Probing for Super-I/O at 0x4e/0x4f
Trying family `National Semiconductor/ITE'... Yes
Found unknown chip with ID 0x0101

and the sensors command is able to report the status (if the kernel module nct6775 is loaded):

nct6798-isa-0290
Adapter: ISA adapter
in0: 704.00 mV (min = +0.00 V, max = +1.74 V)
in1: 1.68 V (min = +0.00 V, max = +0.00 V) ALARM
in2: 3.41 V (min = +0.00 V, max = +0.00 V) ALARM
in3: 3.31 V (min = +0.00 V, max = +0.00 V) ALARM
in4: 984.00 mV (min = +0.00 V, max = +0.00 V) ALARM
in5: 888.00 mV (min = +0.00 V, max = +0.00 V) ALARM
in6: 1.34 V (min = +0.00 V, max = +0.00 V) ALARM
in7: 3.41 V (min = +0.00 V, max = +0.00 V) ALARM
in8: 3.23 V (min = +0.00 V, max = +0.00 V) ALARM
in9: 528.00 mV (min = +0.00 V, max = +0.00 V) ALARM
in10: 528.00 mV (min = +0.00 V, max = +0.00 V) ALARM
in11: 416.00 mV (min = +0.00 V, max = +0.00 V) ALARM
in12: 1.01 V (min = +0.00 V, max = +0.00 V) ALARM
in13: 616.00 mV (min = +0.00 V, max = +0.00 V) ALARM
in14: 1.50 V (min = +0.00 V, max = +0.00 V) ALARM
fan1: 719 RPM (min = 0 RPM)
fan2: 835 RPM (min = 0 RPM)
fan3: 831 RPM (min = 0 RPM)
fan4: 660 RPM (min = 0 RPM)
fan5: 460 RPM (min = 0 RPM)
fan6: 681 RPM (min = 0 RPM)
fan7: 1191 RPM (min = 0 RPM)
SYSTIN: +35.5°C sensor = thermistor
CPUTIN: +25.0°C (high = +127.0°C, hyst = +110.0°C) sensor = thermistor
AUXTIN0: +9.0°C sensor = thermistor
AUXTIN1: +23.0°C sensor = thermistor
AUXTIN2: +35.0°C sensor = thermistor
AUXTIN3: -1.0°C sensor = thermistor
PECI Agent 0: +32.5°C (high = +80.0°C, hyst = +75.0°C)
				      (crit = +115.0°C)
PCH_CHIP_CPU_MAX_TEMP: +0.0°C
PCH_CHIP_TEMP: +0.0°C
PCH_CPU_TEMP: +0.0°C
intrusion0: ALARM
intrusion1: ALARM
beep_enable: disabled

How to identify lm-sensors entities?

This is the hardest part since motherboard and SIO chip vendors are not always providing documentation about their implementation details. I followed the same method that I used in my previous project.

1. voltages

Mapping and naming of the different voltage lines can be identified with the help of A-Tuning's configuration file. If you run this utility then the minimum and maximum voltage values will also be displayed.

Motherboard lm-sensor Register ASRock utility Min Max
CPU Vcore in0 0x80 SIO8_V 0.9 2.1
+5.0V in1 0x81 P5P0_V 4.5 5.5
ignored in2 0x82 none
+3.3V in3 0x83 P3P3_V 2.98 3.63
+12V in4 0x84 P12_V 2.98 3.63
VCCIN_AUX in5 0x85 SIO1_V 1.7 2.5
DRAM in6 0x86 SIO3_V 1.1 1.65
ignored in7 0x87
ignored in8 0x88
ignored in9 0x89
+1.05V PROC in10 0x8A SIO6_V 0.95 1.8
+0.82V PCH in11 0x8B SIO4_V 0.72 1.3
+1.05V PCH in12 0x8C SIO2_V 0.94 1.5
VCCSA in13 0x8D SIO5_V 0.95 2.0

2. fans

These assignments can be checked either with turning the fans on and off manually or adjusting their rotation speed in the BIOS individually. The reported fan values do not require additional computational steps in the configuration file.

Motherboard lm-sensor
Chassis Fan3 fan1
CPU Fan1 fan2
CPU Fan2 fan3
Chassis Fan1 fan4
Chassis Fan2 fan5
Chassis Fan4 fan6
Chassis Fan5 fan7

3. temperatures

Motherboard lm-sensor
Motherboard temp1 (SYSTIN)
CPU temp7 (PECI Agent 0)

Please note:

  • CPUTIN is a sensor on the motherboard showing the temperature around the CPU socket. It will always be lower than the real CPU temperature
  • PECI Agent 0 was selected to represent the CPU temperature
  • Use coretemp kernel module if you need temperatures of the individual CPU cores
  • There are no useful information about the other sensors, they are ignored

The new configuration

You can copy this new configuration file (Z690_Extreme.conf) to folder /etc/sensors.d/, restart the lm_sensors.service, and the output of the sensors command will display this:

nct6798-isa-02a0
Adapter: ISA adapter
CPU Vcore:    496.00 mV (min =  +0.20 V, max =  +2.04 V)
+5.0V:          5.04 V  (min =  +4.51 V, max =  +5.50 V)
+3.3V:          3.33 V  (min =  +2.98 V, max =  +3.63 V)
+12V:          11.81 V  (min = +11.42 V, max = +12.58 V)
VCCIN_AUX:      1.78 V  (min =  +1.70 V, max =  +2.50 V)
DRAM:           1.34 V  (min =  +1.10 V, max =  +1.65 V)
+1.05V PROC:    1.06 V  (min =  +0.94 V, max =  +1.81 V)
+0.82V PCH:   832.00 mV (min =  +0.72 V, max =  +1.30 V)
+1.05V PCH:     1.01 V  (min =  +0.95 V, max =  +1.50 V)
VCCSA:          1.23 V  (min =  +0.94 V, max =  +2.00 V)
Chassis fan3:  581 RPM  (min =    0 RPM)
CPU fan1:      773 RPM  (min =  200 RPM)
CPU fan2:      716 RPM  (min =    0 RPM)
Chassis fan1:  869 RPM  (min =    0 RPM)
Chassis fan2:  503 RPM  (min =    0 RPM)
Chassis fan4:  563 RPM  (min =    0 RPM)
Chassis fan5: 2523 RPM  (min =    0 RPM)
Motherboard:   +30.5°C    sensor = thermistor
CPU:           +29.5°C  (high = +80.0°C, hyst = +75.0°C)
		(crit = +115.0°C)
beep_enable:  enabled

Notes:

  • Beep warnings are enabled.
  • There is a limitation how sensors can handle voltage values above 2.048V (read more about this topic on page 59 in NCT677xF Data Sheet). I assume this is the reason why some maximum values are truncated at 2.04V in lm-sensors.
  • All fans are enabled in the configuration. You can use ignore statement to hide any of them.
  • If you modify min or max values in the configuration you have to restart the systemd service of lm-sensors (e.g. systemctl restart lm_sensors.service).
  • This configuration was tested on Debian Linux 11 (kernel v5.17) and Arch Linux (kernel v5.15).

References

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Lm-sensors configuration for ASRock Z690 Extreme motherboards on Linux

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