Target temperature script Nvidia Linux

Mining
1

Hi

In the nvidia settings is no option to set a target temperature. That’s why I wrote a script where you can set a target temperature, a minimum fan speed and a maximum fan speed. If somebody is interested, just copy the code, paste it into a text file, set it up as you wish (number of GPUs, target temperature, start fan speed, minimum fan speed, maximum fan speed, check interval) and save it . Make it executable with “chmod +x filename” and start it with “./filename”. If you have any questions, problems or if you find a bug just let me know. I’m not a professional coder, but the script works in my case without any problems.

#!/bin/bash

# Number of your GPUs, has to be greater than 0
numberOfGpus="6"

# Target temperature in degree Celsius, has to be less than 90 and at least 30
targetTemp="64"

# Start fan speed in %, has to be at least 35, less than maximum fan speed and greater than minimum fan speed
startSpeedPercentage="50"

# Minimum fan speed in %, has to be at least 25 and less than maximum fan speed
minSpeedPercentage="35"

# Maximum fan speed in %, has to be at least 50, less than 100 and greater than minimum fan speed
maxSpeedPercentage="95"

# Check interval in seconds, has to be less than 61 and greater than 3. Recommended 25 - 35
interval="30"


if [ -z "$numberOfGpus" ] || [ -z "$targetTemp" ] || [ -z "$startSpeedPercentage" ] || [ -z "$minSpeedPercentage" ] || [ -z "$maxSpeedPercentage" ] || [ -z "$interval" ]
    then
        echo "Invalid varibles, empty variables not allowed - exit..."
        exit 1
fi

if ! [[ "$numberOfGpus" =~ ^[0-9]+$ ]] || ! [[ "$targetTemp" =~ ^[0-9]+$ ]] || ! [[ "$startSpeedPercentage" =~ ^[0-9]+$ ]] || ! [[ "$minSpeedPercentage" =~ ^[0-9]+$ ]] || ! [[ "$maxSpeedPercentage" =~ ^[0-9]+$ ]] || ! [[ "$interval" =~ ^[0-9]+$ ]]
    then
        echo "Invalid variables, integers only - exit..."
        exit 1
fi

if [ "$numberOfGpus" -lt "1" ] || [ "$targetTemp" -gt "90" ] || [ "$targetTemp" -lt "30" ] || [ "$startSpeedPercentage" -lt "35" ] || [ "$startSpeedPercentage" -gt "$maxSpeedPercentage" ] ||  [ "$startSpeedPercentage" -lt "$minSpeedPercentage" ] || [ "$minSpeedPercentage" -lt "25" ] || [ "$minSpeedPercentage" -gt "$maxSpeedPercentage" ] || [ "$maxSpeedPercentage" -gt "100" ] || [ "$maxSpeedPercentage" -lt "50" ] || [ "$interval" -gt "60" ] || [ "$interval" -lt "3" ]
    then
        echo "Ivalid variables - exit..."
        exit 1
fi

echo "Number of GPUs: ${numberOfGpus}"
echo "Temperature target: ${targetTemp} degree Celsius"
echo "Start speed: ${startSpeedPercentage}%"
echo "Minimum speed: ${minSpeedPercentage}%"
echo "Maximum speed: ${maxSpeedPercentage}%"
echo "Interval: ${interval} seconds"
echo ""
echo ""

gpu="$numberOfGpus"
let "gpu--"

while [ "$gpu" -ge "0" ]
do
    nvidia-settings -a [gpu:"$gpu"]/GPUFanControlState=1 > /dev/null
    nvidia-settings -a [fan:"$gpu"]/GPUTargetFanSpeed="$startSpeedPercentage" > /dev/null
    eval speedPercentage"$gpu"="$startSpeedPercentage"
    let "gpu--"
done


gpu="$numberOfGpus"
let "gpu--"


while [ "$gpu" -ge "0" ]
do
    eval temp"$gpu"="$(nvidia-smi -i "$gpu" --query-gpu=temperature.gpu --format=csv,noheader)"
    eval \tempDifference$gpu=$((temp$gpu - $targetTemp))

    if eval [ \$"temp"$gpu -lt "$targetTemp" ]
        then
            echo "Temperature OK"
    fi

    if eval [ \$"temp"$gpu -eq "$targetTemp" ]
        then
            echo "Temperature OK"

        elif eval [ \$"speedPercentage"$gpu -eq "$maxSpeedPercentage" ] && eval [ \$"temp"$gpu -gt "$targetTemp" ]
            then
                echo "TARGET TEMPERATURE CANNOT BE REACHED!"               

        elif eval [ \$"tempDifference"$gpu -ge 5 ] && eval [ $((speedPercentage$gpu + 10)) -lt "$maxSpeedPercentage" ]
            then
                eval speedPercentage$gpu=$((speedPercentage$gpu + 10))
                eval nvidia-settings -a [fan:"$gpu"]/GPUTargetFanSpeed=\$"speedPercentage"$gpu > /dev/null

        elif eval [ \$"temp"$gpu -gt "$targetTemp" ] && eval [ \$"speedPercentage"$gpu -lt "$maxSpeedPercentage" ]
            then
                eval "let \speedPercentage$gpu++"
                eval nvidia-settings -a [fan:"$gpu"]/GPUTargetFanSpeed=\$"speedPercentage"$gpu > /dev/null

        elif [ "$temp"$gpu"" -lt "$targetTemp" ] && eval [ \$"speedPercentage"$gpu -gt "$minSpeedPercentage" ]
            then
                eval "let \speedPercentage$gpu--"
                eval nvidia-settings -a [fan:"$gpu"]/GPUTargetFanSpeed=\$"speedPercentage"$gpu > /dev/null
    fi

    echo "Target temperature: $targetTemp degree Celsius"
    eval "echo "GPU"$gpu": \$"temp"$gpu degree Celsius""
    eval "echo "GPU"$gpu" Fan: \$"speedPercentage"$gpu%""
    eval "echo "Temperature difference: \$"tempDifference"$gpu" degree Celsuis"
    echo ""

    if [ "$gpu" -eq "0" ]
        then
            gpu="$numberOfGpus"
            echo "------------------------------------------"   
            sleep "$interval"
    fi
    
    let "gpu--"
done
3 Likes
2

Great, thanks for sharing your code. I’m going to take a look at using this rather than the Perl code I wrote… LOL
Keep rocking and keep mining :wink:

1 Like
3

You’re welcome and thanks for your reply. I improved the script a bit (see above). Now it’s possible to increase the check interval time.

Happy mining and I hope the script works well for you.

1 Like
4

I made a small change again. Nothing important, just a display correction.

5

This is great - it’s very similar to what I’m building in Python. The difference is that I keep the fan at 100% and adjust the power level to control temps.

2 Likes