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AI Rig

Limit TDP on RTX 3090s

1. Check Current Power Limits:

  • Use the command nvidia-smi -q -d POWER to see the current power limit settings.
  • This will show you the current power limit, maximum power limit, and other power-related information. 

2. Set a New Power Limit:

  • Use the command sudo nvidia-smi -i <GPU_ID> -pl <POWER_LIMIT_IN_WATTS> to set a new power limit.
  • Replace <GPU_ID> with the ID of the GPU you want to modify (e.g., 0 for the first GPU).
  • Replace <POWER_LIMIT_IN_WATTS> with the desired power limit in watts (e.g., 250 for 250W).
  • Example: sudo nvidia-smi -i 0 -pl 250

Persistence: To make the power limit persistent across reboots, you'll need to create a custom systemd service or script that runs this command on startup. 

3. Verify the Settings:

  • After setting the power limit, use the command nvidia-smi -q -d POWER again to verify that the new power limit has been applied.
  • Check the output to ensure that the "Current Power Limit" reflects the value you set. 

4. Persist the Power Limit on Boot

Create a systemd service:

sudo nano /etc/systemd/system/nvidia-power-limit.service

Paste this:

[Unit]
Description=Set NVIDIA GPU Power Limit
After=multi-user.target

[Service]
Type=oneshot
ExecStart=/usr/bin/nvidia-smi -i 0 -pl 300
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

Enable it:

sudo systemctl enable nvidia-power-limit.service
sudo systemctl start nvidia-power-limit.service


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