Open Source C# Fan Control Software

NoteBook FanControl (NBFC) is a cross-platform fan control service for notebooks. It comes with a powerful configuration system, which allows to adjust it to many different notebook models. Currently, there are no pre-built releases for Linux, but you can easily build NBFC yourself. In general the NBFC Wiki is the first place to go if you have any questions. If you want to build NBFC from source, the first thing you have to do is to download the source code. You can easily clone the NBFC repository via git. Make sure the Mono runtime + development tools are installed on your machine (Debian based distros: mono-complete, Arch based distros: mono). Config files are an integral part of NBFC, because they define how NBFC interacts with your notebook's embedded controller (EC). The EC monitors your system's temperatures and controls the fan(s). It sits on the motherboard or is integrated into a Super I/O chip & is connected to the Southbridge via the Low Pin Count (LPC) bus.

Argus Monitor is a powerful fan-control and system-monitoring tool that gives you complete control over cooling behavior across your entire PC. It allows you to manage CPU, GPU, motherboard, and AIO fans using fixed values or advanced temperature-based control curves sourced from any sensor in your system. With multi-controller support, fan profiles, hysteresis, and temperature averaging, Argus Monitor offers smooth, precise fan adjustments with minimal noise fluctuation. The software also includes robust temperature monitoring for CPUs, GPUs, SSDs, RAM, and additional sensor channels. For supported devices, it provides RGB control as well as gadget and tray-icon displays for quick system insights. Lightweight, stable, privacy-respecting, and fully customizable, Argus Monitor is one of the most comprehensive PC cooling and monitoring solutions available.

FanCtrl is a Windows desktop utility focused on automatically controlling PC fan speeds using temperature sensors and customizable fan curves, so your cooling behavior matches how you actually use your system. It combines monitoring and control in one place, letting you view temperatures, fan RPM, and control percentages while you tune how aggressively each fan responds. The project supports a range of control backends and integrations, including motherboard fan headers and several popular cooling ecosystems, and it can also pull sensor data from common monitoring tools so your fan logic can react to the readings you trust. A core concept is “auto fan control” profiles where you pick a target temperature sensor, select which fans should follow it, and then shape the curve via a graph-like interface. It also includes quality-of-life options like renaming items, choosing units (including Fahrenheit), and starting minimized for a set-it-and-forget-it setup.

Steam Deck Tools is a community-driven collection of utilities designed to enhance the experience of running Windows on the Valve Steam Deck. Hosted on GitHub and written primarily in C#, this suite bundles multiple practical tools into a single package, including fan control, performance overlay, power (TDP and refresh rate) adjustment, and Steam Controller support. The tools aim to fill functionality gaps when running Windows on a device originally optimized for SteamOS, such as adjusting thermal behavior or viewing real-time stats like FPS. Users have noted the project provides a lightweight alternative to other companion utilities and can be especially helpful when default drivers or settings don’t cover desired features. Because this software interacts with low-level system controls, its use carries some risk of instability, and it’s provided on a best-effort basis with documentation on installation and troubleshooting.