ASRock 970 Pro3 R2.0 sensors

I decided to make a ‘budget upgrade’ on the computer that I use for checking my SlackBuilds and I bought an ASRock 970 Pro3 R2.0 motherboard and an AMD FX8350 CPU. So, compared to my old FX4100 processor, I now have twice more cores and a bit higher clockspeed. The old CPU and motherboard, in turn, found their use to upgrade another PC. Unfortunatelly, I did not get the hardware sensors to work out-of-the-box with the new motherboard. As a result, I was not able to monitor the CPU temperature, which (for me) is quite important.

I am running Slackware -current and the sensors did not work with its stock kernel nor with kernel 4.17.2, built from source. Of course I tried:


Nothing. I googled around, I really did, I searched, but could not find a solution. In the end I asked in the ##slackware IRC channel at freenode. I had my problem solved in less than 10 min by the community, thanks shadowsun.

The module that had to be loaded is: nct6775. So, I just put the following in my /etc/rc.d/rc.local file:

# /etc/rc.d/rc.local:  Local system initialization script.
# Put any local startup commands in here.  Also, if you have
# anything that needs to be run at shutdown time you can
# make an /etc/rc.d/rc.local_shutdown script and put those
# commands in there.

# config_sensors_nct6775 generates nct6775
modprobe nct6775

EDIT (14.07.18). Actually, a better place seems to be /etc/rc.d/rc.modules.local, as the comment in the file says. Thanks anestis for the suggestion. Therefore:


# /etc/rc.d/rc.modules.local

# The Linux kernel source is the best place to look for documentation
# for the many available kernel modules.  This can be found under
# /usr/src/linux-$VERSION/Documentation/.

# Almost all necessary modules are automatically loaded when needed,
# but there are a few exceptions.  Here's a (not all-inclusive) list,
# so uncomment any of the below entries or add others as needed:
# Note that you could also create/edit rc.modules-$version if you
# only wanted specific modules loaded for particular kernels.

#/sbin/modprobe tun            # Universal TUN/TAP device driver
#/sbin/modprobe sg             # Generic SCSI support for SATA DVD-RW

# config_sensors_nct6775 generates nct6775
/sbin/modprobe nct6775

Now, the Xfce sensors plugin suggests to display information from nct6776-290 and typing in the terminal:


outputs the same information from nct6776-isa-0290. Well, in moments like this I wish I knew more about hardware and stuff, because I really do not know why these are called nct6776-* and not nct6775-* like the module. Sorry…

Anyway. It works! Great.

2 Comments on “ASRock 970 Pro3 R2.0 sensors”

  1. anestis says:

    I am in a similar situation with an AMD APU system so thanks for that. As I noticed there is also rc.modules.local in rc.d directory. Could the module be placed there instead?

  2. slackalaxy says:

    Yes, rc.modules.local seems to works and is probably the right place. Thanks!

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