JetPack & ML

Orin NX/Nano


FAN Profile

While the default fan profile is "quiet", for more demanding machine learning and other computation tasks it might be better to change the fan profile to "cool", which is also pretty quiet,

To change the profile to "cool":

sudo sed -i 's/FAN_DEFAULT_PROFILE .*/FAN_DEFAULT_PROFILE cool/g' /etc/nvfancontrol.conf

To change the profile to "quiet":

sudo sed -i 's/FAN_DEFAULT_PROFILE .*/FAN_DEFAULT_PROFILE quiet/g' /etc/nvfancontrol.conf

After any of the above, invoke:

sudo rm /var/lib/nvfancontrol/status  
sudo systemctl restart nvfancontrol

Power Mode

Depending on the module model, your module might not be configured to use it's whole potential. We list all the power modes for all of the Orin modules and the default mode. Make sure to check (with the commands below) if you module is running at the power mode of your choice.


Jetson Orin Nano 4GB:

0: 10W
1: 7W_AI
2: 7W_CPU

default mode: 0

Jetson Orin Nano 8GB:

0: 15W
1: 7W

default mode: 0

Jetson Orin NX 8 GB:

0: MAXN (best)
1: 10W
2: 15W
3: 20W

default mode: 2

Jetson Orin NX 16 GB:

0: MAXN (best)
1: 10W
2: 15W
3: 25W

default mode: 2

To check the current power mode:

sudo /usr/sbin/nvpmodel -q

To set a new mode:

sudo /usr/sbin/nvpmodel -m <x>

Where <x> is the power mode ID (i.e. 0, 1, 2 or 3).

Example command execution:

sudo /usr/sbin/nvpmodel -m 0

The same setting can be changed using GUI:


As mentioned before, this flashing method does not provide Jetpack. It's time to install it.

To install Jetpack, let's first update the Orin module operating system:

sudo apt update  
sudo apt -y upgrade  
sudo apt -y dist-upgrade  
sudo apt install --fix-broken -o Dpkg::Options::="--force-overwrite"  
sudo reboot

Then install the Jetpack:

sudo apt -y install nvidia-jetpack  
sudo reboot

Machine Learning

Tensorflow and PyTorch instalaltion for the Orin modules


sudo apt -y install autoconf bc build-essential g++-8 gcc-8 clang-8 lld-8 gettext-base gfortran-8 iputils-ping libbz2-dev libc++-dev libcgal-dev libffi-dev libfreetype6-dev libhdf5-dev libjpeg-dev liblzma-dev libncurses5-dev libncursesw5-dev libpng-dev libreadline-dev libssl-dev libsqlite3-dev libxml2-dev libxslt-dev locales moreutils openssl python-openssl rsync scons python3-pip libopenblas-dev curl wget


export REPO_URL=  
export JETPACK_VERSION=$(curl -s $REPO_URL | grep -oP 'v\K[0-9]+(?=/)' | sed 's/./&\./g' | rev | cut -c2- | rev | sort -V | sed 's/\.//g' | tail -n 1)  
export JETPACK_VERSION=$(sudo apt-cache show nvidia-jetpack | grep "Version" | grep -oP '(?<=: ).*?(?=-)' | tr -d '.')  
export TENSORFLOW_INSTALL=$TENSORFLOW_REPO_URL$(curl -s $TENSORFLOW_REPO_URL | grep -oP 'tensorflow-.*?\.whl' | sort -V | tail -n 1)  
sudo pip3 install --upgrade --no-cache $TENSORFLOW_INSTALL


export REPO_URL=  
export JETPACK_VERSION=$(curl -s $REPO_URL | grep -oP 'v\K[0-9]+(?=/)' | sed 's/./&\./g' | rev | cut -c2- | rev | sort -V | sed 's/\.//g' | tail -n 1)  
export JETPACK_VERSION=$(sudo apt-cache show nvidia-jetpack | grep "Version" | grep -oP '(?<=: ).*?(?=-)' | tr -d '.')  
export TORCH_INSTALL=$TORCH_REPO_URL$(curl -s $TORCH_REPO_URL | grep -oP 'torch-.*?\.whl' | sort -V | tail -n 1)  
sudo pip3 install --upgrade --no-cache $TORCH_INSTALL


To put some load on the CPU we'll use stress:

sudo apt -y install stress


sudo reboot

Now you can open Jetson Power GUI - it can be found in the upper-right corner when you click on the power profile, below the power mode settings

Additionally, open 2 terminal windows.

Save this Python code into the file - this is a neural network that does really nothing useful (computes some noise), but puts a load on the GPU (assumes you installed TensorFlow):

import os  
import time  
import subprocess  
from threading import Thread  
import tensorflow as tf  
from tensorflow.keras import optimizers, layers, models  
import numpy as np  
DATA_SHAPE = (256, 256, 3)  
model = models.Sequential()  
model.add(layers.Conv2D(HIDDEN_LAYER_KERNELS, (3, 3), activation='relu', input_shape=DATA_SHAPE, strides=(1, 1), padding="same"))  
model.add(layers.MaxPooling2D((2, 2), strides=(1, 1), padding="same"))  
for _ in range(HIDDEN_LAYERS):  
    model.add(layers.Conv2D(HIDDEN_LAYER_KERNELS, (5, 5), activation='relu', strides=(1, 1), padding="same"))  
    model.add(layers.MaxPooling2D((5, 5), strides=(1, 1), padding="same"))  
model.add(layers.Conv2D(2, (DATA_SHAPE[0] // 8, DATA_SHAPE[1] // 8), activation='relu'))  
model.add(layers.Dense(64, activation='relu'))  
X = np.ones((DATASET_SIZE, *DATA_SHAPE))  
y = np.ones((DATASET_SIZE, 10))  
data =, y))  
data = data.batch(BATCH_SIZE)  
loss=tf.keras.losses.BinaryCrossentropy()), epochs=1000)

In one terminal window run:

stress -c 8

to stress the CPU, and in another run:


to stress the GPU at the same time. At this stage, the Orin NX might start showing over-current messages which means we are an amount of load beyond what it can handle.