How to Reduce the TDP of LattePanda Sigma

🔖Background: 

The LattePanda Sigma is equipped with a high-performance Intel Core i5-1340P processor, delivering excellent computing power ideal for edge computing, AI inference, industrial control, and other demanding applications. However, in some projects, you may not require full performance and instead prioritize lower power consumption and reduced heat output—especially when using passive cooling or operating in enclosed environments.

This guide will walk you through how to reduce the TDP of your LattePanda Sigma via BIOS settings.
 

1️⃣ Enter the BIOS Setup Interface

1. Shut down your LattePanda Sigma and restart it.
2. During the Power-On Self Test, press the `F2` key repeatedly to enter the BIOS setup interface.  
  > Tip: If you miss the timing, simply reboot and try again.
 

2️⃣ Navigate to CPU Power & Performance Settings

1. In the BIOS main interface, use the arrow keys to switch to the Advanced tab.
2. Enter CPU Power & Performance.

3️⃣ Access CPU Power Management

1. Select CPU - Power Management Control.

2. Then, navigate into Config TDP Configurations.

4️⃣Adjust TDP (Power Limit) Values

In the Config TDP Configurations screen, you’ll see two key parameters:

- Power Limit 1 (PL1): Sustained power limit (base TDP)  

- Power Limit 2 (PL2): Short-term peak power limit (turbo boost power)

  > Default Settings:  

  > - Power Limit 1: 45W  

  > - Power Limit 2: 64W

📌 Adjustment Recommendations:

- For significant heat reduction and passive cooling: 

  - Set Power Limit 1 to 28W or 35W  

  - Set Power Limit 2 to 35W or 45W  

  > Lower TDP reduces sustained CPU performance but greatly lowers heat output—ideal for fanless designs.

- For moderate thermal reduction while preserving performance: 

  - Set PL1 to 40W, PL2 to 55W

5️⃣ Save and Exit

1. After making your changes, go to Save & Exit.

2. Select Save Changes and Reset to confirm and restart the system.

Your LattePanda Sigma will reboot with the new TDP configuration now active.

By adjusting the TDP in BIOS, you gain fine-grained control over the LattePanda Sigma’s power and thermal behavior. This makes it easier to deploy in compact, fanless, or low-power embedded systems. Proper TDP tuning enhances system stability and extends device lifespan.