# Target temperature script Nvidia Linux
**URL:** https://forum.zcashcommunity.com/t/target-temperature-script-nvidia-linux/28481
**Category:** Mining
**Created:** [April 28, 2018, 5:37pm UTC](https://forum.zcashcommunity.com/t/target-temperature-script-nvidia-linux/28481 "2018-04-28T17:37:12Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@shark1](https://forum.zcashcommunity.com/u/shark1)
#### Post date: [April 28, 2018, 5:37pm UTC](https://forum.zcashcommunity.com/t/target-temperature-script-nvidia-linux/28481/1 "2018-04-28T17:37:12Z")
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
```
---
### Author:  [@imcmurray](https://forum.zcashcommunity.com/u/imcmurray)
#### Post date: [May 1, 2018, 2:20pm UTC](https://forum.zcashcommunity.com/t/target-temperature-script-nvidia-linux/28481/2 "2018-05-01T14:20:49Z")
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 😉
---
### Author:  [@shark1](https://forum.zcashcommunity.com/u/shark1)
#### Post date: [May 2, 2018, 7:02pm UTC](https://forum.zcashcommunity.com/t/target-temperature-script-nvidia-linux/28481/3 "2018-05-02T19:02:58Z")
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.
---
### Author:  [@shark1](https://forum.zcashcommunity.com/u/shark1)
#### Post date: [May 3, 2018, 5:46pm UTC](https://forum.zcashcommunity.com/t/target-temperature-script-nvidia-linux/28481/4 "2018-05-03T17:46:09Z")
I made a small change again. Nothing important, just a display correction.
---
### Author:  [@root](https://forum.zcashcommunity.com/u/root)
#### Post date: [May 3, 2018, 9:25pm UTC](https://forum.zcashcommunity.com/t/target-temperature-script-nvidia-linux/28481/5 "2018-05-03T21:25:12Z")
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.