nvidia-fan-control_README


        
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            NVIDIA Aggressive Fan Control Service
What this is
A headless fan control daemon for the NVIDIA RTX Pro 6000 Blackwell Workstation Edition

running on Ubuntu with driver 590. No X11 or display manager required.
Why it exists
The RTX Pro 6000's default fan curve is tuned for quiet office/workstation use.

Under sustained rendering workloads it kept fans at ~50% even at 83°C with only 10°C

of thermal headroom, causing hard power-off crashes.
This daemon replaces the stock curve with an aggressive gaming-style curve via the

NVML Python API (pynvml), keeping the GPU in the 70-74°C range at 83-86% fan speed

instead of crashing.
Results (tested 2026-02-17)


Metric
Stock curve (crashed)
This daemon (stable)


GPU peak temp
83°C
73°C


Thermal headroom
10°C
20°C


Fan at load
50%
86%


32-image render
Crash
Completed


Fan curve


GPU Temp
Fan Speed


0°C
30%


45°C
40%


55°C
55%


63°C
70%


70°C
82%


75°C
90%


80°C+
100%


Values between points are interpolated linearly.

Files

nvidia-fan-control.py — the daemon script
nvidia-fan-control.service — systemd unit file
README.md — this file


Prerequisites
# pynvml must be installed
pip3 show nvidia-ml-py

# If missing:
pip3 install nvidia-ml-py

Install / Reinstall steps
1. Copy the daemon script
sudo cp nvidia-fan-control.py /usr/local/bin/nvidia-fan-control.py
sudo chmod +x /usr/local/bin/nvidia-fan-control.py
2. Test it manually first (Ctrl+C to stop, auto-restores fan control)
sudo python3 /usr/local/bin/nvidia-fan-control.py
3. Install the systemd service
sudo cp nvidia-fan-control.service /etc/systemd/system/nvidia-fan-control.service
sudo systemctl daemon-reload
sudo systemctl enable nvidia-fan-control.service
sudo systemctl start nvidia-fan-control.service
4. Verify it's running
sudo systemctl status nvidia-fan-control.service

Useful commands
# Watch live fan log
sudo journalctl -u nvidia-fan-control.service -f

# Stop the service (fans revert to automatic)
sudo systemctl stop nvidia-fan-control.service

# Disable from autostart
sudo systemctl disable nvidia-fan-control.service

# Check GPU temps and fan live
watch -n 1 nvidia-smi --query-gpu=temperature.gpu,fan.speed,power.draw,power.limit --format=csv,noheader

Notes

Tested on: Ubuntu 24.04, Driver 590.48.01, RTX Pro 6000 Blackwell
Power limit does NOT need to be reduced (600W default is fine with proper cooling)
The daemon runs as root (required for NVML fan control)
On daemon exit (including service stop), fan control is automatically returned to the driver
Metric	Stock curve (crashed)	This daemon (stable)
GPU peak temp	83°C	73°C
Thermal headroom	10°C	20°C
Fan at load	50%	86%
32-image render	Crash	Completed