Controlling Laptop Fans with HWInfo: A Comprehensive Guide

As a laptop user, you may have encountered issues with fan control, especially when dealing with demanding tasks that generate heat. In this article, we'll explore how to use HWInfo to monitor and control your laptop fans, ensuring optimal performance and preventing overheating.

Implementing HwInfo Fan Control

To get started, you need to download and install HWinfo64 or HWinfo32 on your system. Once installed, launch the software and navigate to the 'Fan' section. From here, you can configure your fans to ramp up when the CPU temperature exceeds a certain threshold.

For example, if you set the desired limit at 75-80°C, the CPU temps will be controlled, and the GPU will benefit from being cooler. This method is particularly useful for users who want to prevent their laptop from overheating during intense gaming or video editing sessions.

Overwriting Fan Speeds with HwInfo

Another option is to implement a check by HwInfo every 250-1000 ms, which verifies if the fan speeds are corresponding with HwInfos desired values. If not, overwrite them again. This ensures that your fans are always running at optimal speeds, preventing unnecessary noise and energy consumption.

Writing to Fan RPM EC Register

Some users have reported success with writing to the fan RPM ec register every x ms. This method is similar to what's used in tools like NBFC by Mr. 'Lastname'. However, it's essential to note that this approach may not work on all systems, as some laptops might ignore these registers.

The Issue with Dell's dGPU Fan Trigger

Unfortunately, users of Dell laptops running BIOS 1.7.0 have reported an issue where the fans spin uncontrollably, even when the system is idle. This problem arises from a change in the dGPU behavior, which causes the fans to spin with 100% chance whenever a dGPU poll is triggered.

Using HWInfo's Manual Fan Mode

To counteract this issue, you can use HWInfo's manual fan mode. To access this feature:

1. Download and install HWinfo64 or HWinfo32.

2. Execute it.

3. Select RUN in the first tiny window.

4. Close all other windows until only the 'Fan' window remains open.

5. Click on the sensor option.

6. Choose what you want to control, depending on your laptop model.

In conclusion, using HWInfo to monitor and control your laptop fans is a reliable method for ensuring optimal performance and preventing overheating. With its manual fan mode and ability to overwrite fan speeds, you can customize your fan settings to suit your needs. While there may be some limitations with certain laptops and BIOS versions, the general principles outlined in this article should provide a solid foundation for anyone looking to take control of their laptop's fans.

I hope you found this article helpful! Let me know if you have any questions or need further clarification on any of these steps.

Hwinfo fan control dell