This kernel module permit to recognize the chipset Nuvoton NCT6687-R in lm-sensors package. This sensor is present on some B550 motherboard such as MSI or ASUS.
The implementation is minimalist and was done by reverse coding of Windows 10 source code from LibreHardwareMonitor
- Clone this repository
~$ git clone https://github.com/Fred78290/nct6687d
~$ cd nct6687d- Build package
~$ make deb- Install package
~$ dpkg -i ../nct6687d-dkms_*.deb- Clone this repository
~$ git clone https://github.com/Fred78290/nct6687d
~$ cd nct6687d- Build & install package
~$ make akmod- Ubuntu/Debian:
apt-get install build-essential linux-headers-$(uname -r) dkms - Fedora/CentOS/RHEL:
yum install make automake gcc gcc-c++ kernel-devel kernel-headers dkms - ArchLinux:
pacman -S make automake linux-firmware linux-headers dkms base-devel - openSUSE:
zypper in git make gcc dkms
~$ git clone https://github.com/Fred78290/nct6687d
~$ cd nct6687d
~$ make dkms/install~$ git clone (this-repo)
~$ cd nct6687d
~$ make installBy running the command sensors, you got this output
nct6687-isa-0a20
Adapter: ISA adapter
+12V: 12.17 V (min = +12.17 V, max = +12.19 V)
+5V: 5.14 V (min = +5.14 V, max = +5.14 V)
+3.3V: 3.38 V (min = +3.38 V, max = +3.38 V)
CPU Soc: 1.11 V (min = +1.11 V, max = +1.11 V)
CPU Vcore: 1.05 V (min = +0.97 V, max = +1.05 V)
CPU 1P8: 1.84 V (min = +1.84 V, max = +1.84 V)
CPU VDDP: 0.00 V (min = +0.00 V, max = +0.00 V)
DRAM: 1.34 V (min = +1.34 V, max = +1.35 V)
Chipset: 890.00 mV (min = +0.89 V, max = +0.89 V)
CPU Fan: 1192 RPM (min = 1192 RPM, max = 1202 RPM)
Pump Fan: 1538 RPM (min = 1526 RPM, max = 1538 RPM)
System Fan #1: 922 RPM (min = 920 RPM, max = 922 RPM)
System Fan #2: 953 RPM (min = 953 RPM, max = 953 RPM)
System Fan #3: 1393 RPM (min = 1393 RPM, max = 1393 RPM)
System Fan #4: 0 RPM (min = 0 RPM, max = 0 RPM)
System Fan #5: 1007 RPM (min = 1007 RPM, max = 1007 RPM)
System Fan #6: 0 RPM (min = 0 RPM, max = 0 RPM)
CPU: +59.0°C (low = +52.0°C, high = +59.0°C)
System: +34.0°C (low = +34.0°C, high = +34.0°C)
VRM MOS: +31.0°C (low = +31.0°C, high = +31.0°C)
PCH: +40.0°C (low = +40.0°C, high = +40.0°C)
CPU Socket: +33.0°C (low = +33.0°C, high = +33.0°C)
PCIe x1: +32.0°C (low = +32.0°C, high = +32.0°C)
M2_1: +0.0°C (low = +0.0°C, high = +0.0°C)
To make it loaded after system boots
Just add nct6687 into /etc/modules
sudo sh -c 'echo "nct6687" >> /etc/modules'
sudo sh -c 'echo "nct6687" >> /etc/modules-load.d/nct6687.conf'
This module was tested on Ubuntu 20.04 with all kernel availble on motherboard MAG-B550-TOMAHAWK running an AMD 3900X/AMD 5900X
- Many people have reported compatibility with MB having Intel H410M & H510M chipset from some manufacturer. See issue report.
- Add support for MSI B460M Bazooka having NCT6687 with another device ID
- Add support to use generic voltage input without multiplier, allows sensors custom conf
Some people report that voltage are wrong. The reason is with some motherboard, voltage sensors are not connected on the same nct6687 register.
As example the VCore sensor is connected on the 5th register for AMD but is connected on the 3rd register for INTEL.
Also the DIMM sensor is connected on the 4th register for AMD but connected to 5th register for INTEL.
To allow customize voltage configuration you must add manual=1 parameter passed to the module at load
sudo sh -c 'echo "nct6687 manual=1" >> /etc/modules'
And use a sensors conf like this /etc/sensors.d/B460M-7C83.conf
# Micro-Star International Co., Ltd.
# MAG B460M BAZOOKA (MS-7C83)
chip "nct6687-*"
label in0 "+12V"
label in1 "+5V"
label in2 "VCore"
label in3 "Voltage #1"
label in4 "DIMM"
label in5 "CPU I/O"
label in6 "CPU SA"
label in7 "Voltage #2"
label in8 "+3.3V"
label in9 "VTT"
label in10 "VRef"
label in11 "VSB"
label in12 "AVSB"
label in13 "VBat"
ignore in3
ignore in7
ignore in9
ignore in10
ignore in13
ignore temp6
ignore temp7
compute in0 (@ * 12), (@ / 12)
compute in1 (@ * 5), (@ / 5)
compute in4 (@ * 2), (@ / 2)
1. Fan speed control
- Changing fan speed was tested succesfuly by users, see reported issue.