Nouvelle carte mère Gigabyte AB350M-HD3, bien reconnue à partir des kernels 4.10 il manque cependant la reconnaissance par lm-sensors des composants.

un petit sudo sensor-detect donne :

# sensors-detect revision 6284 (2015-05-31 14:00:33 +0200)
# System: Gigabyte Technology Co., Ltd. AB350M-HD3 [Default string]
# Board: Gigabyte Technology Co., Ltd. AB350M-HD3-CF
# Kernel: 4.15.0-20-generic x86_64
# Processor: AMD Ryzen 5 1600X Six-Core Processor (23/1/1)

This program will help you determine which kernel modules you need
to load to use lm_sensors most effectively. It is generally safe
and recommended to accept the default answers to all questions,
unless you know what you're doing.

Some south bridges, CPUs or memory controllers contain embedded sensors.
Do you want to scan for them? This is totally safe. (YES/no):
Silicon Integrated Systems SIS5595...   No
VIA VT82C686 Integrated Sensors...                          No
VIA VT8231 Integrated Sensors...                            No
AMD K8 thermal sensors...                                   No
AMD Family 10h thermal sensors...                           No
AMD Family 11h thermal sensors...                           No
AMD Family 12h and 14h thermal sensors...                   No
AMD Family 15h thermal sensors...                           No
AMD Family 16h thermal sensors...                           No
AMD Family 15h power sensors...                             No
AMD Family 16h power sensors...                             No
Intel digital thermal sensor...                             No
Intel AMB FB-DIMM thermal sensor...                         No
Intel 5500/5520/X58 thermal sensor...                       No
VIA C7 thermal sensor...                                    No
VIA Nano thermal sensor...                                  No

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'...               No
Trying family `ITE'...                                      Yes
Found unknown chip with ID 0x8686
Probing for Super-I/O at 0x4e/0x4f
Trying family `National Semiconductor/ITE'...               No
Trying family `SMSC'...                                     No
Trying family `VIA/Winbond/Nuvoton/Fintek'...               No
Trying family `ITE'...                                      Yes
Found unknown chip with ID 0x8733

Some systems (mainly servers) implement IPMI, a set of common interfaces
through which system health data may be retrieved, amongst other things.
We first try to get the information from SMBIOS. If we don't find it
there, we have to read from arbitrary I/O ports to probe for such
interfaces. This is normally safe. Do you want to scan for IPMI
interfaces? (YES/no):
Probing for `IPMI BMC KCS' at 0xca0...                      No
Probing for `IPMI BMC SMIC' at 0xca8...                     No

Some hardware monitoring chips are accessible through the ISA I/O ports.
We have to write to arbitrary I/O ports to probe them. This is usually
safe though. Yes, you do have ISA I/O ports even if you do not have any
ISA slots! Do you want to scan the ISA I/O ports? (YES/no):
Probing for `National Semiconductor LM78' at 0x290...       No
Probing for `National Semiconductor LM79' at 0x290...       No
Probing for `Winbond W83781D' at 0x290...                   No
Probing for `Winbond W83782D' at 0x290...                   No

Lastly, we can probe the I2C/SMBus adapters for connected hardware
monitoring devices. This is the most risky part, and while it works
reasonably well on most systems, it has been reported to cause trouble
on some systems.
Do you want to probe the I2C/SMBus adapters now? (YES/no):
Found unknown SMBus adapter 1022:790b at 0000:00:14.0.
Sorry, no supported PCI bus adapters found.

Next adapter: SMBus PIIX4 adapter port 0 at 0b00 (i2c-0)
Do you want to scan it? (YES/no/selectively):
Client found at address 0x4f
Probing for `National Semiconductor LM75'...                No
Probing for `National Semiconductor LM75A'...               No
Probing for `Dallas Semiconductor DS75'...                  No
Probing for `Maxim MAX6642'...                              No
Probing for `Texas Instruments TMP421'...                   No
Probing for `Texas Instruments TMP422'...                   No
Probing for `Texas Instruments TMP435'...                   No
Probing for `Texas Instruments TMP441'...                   No
Probing for `Maxim MAX6633/MAX6634/MAX6635'...              No
Probing for `NXP/Philips SA56004'...                        No
Client found at address 0x52
Probing for `Analog Devices ADM1033'...                     No
Probing for `Analog Devices ADM1034'...                     No
Probing for `SPD EEPROM'...                                 No

Next adapter: SMBus PIIX4 adapter port 2 at 0b00 (i2c-1)
Do you want to scan it? (YES/no/selectively):

Next adapter: SMBus PIIX4 adapter port 3 at 0b00 (i2c-2)
Do you want to scan it? (YES/no/selectively):

Next adapter: SMBus PIIX4 adapter port 4 at 0b00 (i2c-3)
Do you want to scan it? (YES/no/selectively):
Next adapter: NVIDIA i2c adapter 4 at 6:00.0 (i2c-4)
Do you want to scan it? (yes/NO/selectively):

Next adapter: NVIDIA i2c adapter 6 at 6:00.0 (i2c-5)
Do you want to scan it? (yes/NO/selectively):

Next adapter: NVIDIA i2c adapter 7 at 6:00.0 (i2c-6)
Do you want to scan it? (yes/NO/selectively):

Sorry, no sensors were detected.
Either your system has no sensors, or they are not supported, or
they are connected to an I2C or SMBus adapter that is not
supported. If you find out what chips are on your board, check
http://www.lm-sensors.org/wiki/Devices for driver status.''

Pour pouvoir profiter de sensors, il suffit de compiler la module it87 dont les sources sont disponibles ici https://github.com/groeck/it87

git clone https://github.com/groeck/it87.git
make clean
make
sudo make install
sudo modprobe it87

Voilà, maintenant une petit ''sensors done :

k10temp-pci-00c3
Adapter: PCI adapter
temp1:        +28.4°C  (high = +70.0°C)

it8686-isa-0a40
Adapter: ISA adapter
in0:          +0.84 V  (min =  +0.00 V, max =  +3.06 V)
in1:          +2.04 V  (min =  +0.00 V, max =  +3.06 V)
in2:          +2.00 V  (min =  +0.00 V, max =  +3.06 V)
in3:          +2.03 V  (min =  +0.00 V, max =  +3.06 V)
in4:          +0.88 V  (min =  +0.00 V, max =  +3.06 V)
in5:          +0.91 V  (min =  +0.00 V, max =  +3.06 V)
in6:          +1.22 V  (min =  +0.00 V, max =  +3.06 V)
3VSB:         +3.26 V  (min =  +0.00 V, max =  +6.12 V)
Vbat:         +3.02 V
fan1:         463 RPM  (min =   10 RPM)
fan2:        1278 RPM  (min =    0 RPM)
temp1:        +33.0°C  (low  =  +0.0°C, high = +70.0°C)  sensor = thermistor
temp2:        +47.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor
temp3:        +18.0°C  (low  =  +0.0°C, high = +60.0°C)  sensor = AMD AMDSI
temp4:        +29.0°C  (low  =  +0.0°C, high = +127.0°C)  sensor = thermistor
temp5:        +42.0°C  (low  =  +0.0°C, high = -113.0°C)  sensor = thermistor
temp6:        +46.0°C  (low  =  +0.0°C, high = -113.0°C)  sensor = thermistor
intrusion0:  ALARM

fan1 étant le ventilo du CPU

fan2 étant le ventilo de la tour

temp5 étant le température du CPU à priori.