HZ-Changer

🖥️ Refresh Rate Changer (Hz Changer)

A lightweight, high-performance Windows utility built in C# that allows users to instantly switch their monitor's refresh rate between the maximum supported frequency and the standard 60Hz.

🚀 How to Use

To see HZ-Changer in action, watch the quick demo below:

Details

HZ.Changer.mp4

🚀 Overview

Many gaming laptops and monitors don't always default to their highest refresh rate, or users might want to drop to 60Hz to save battery life. Refresh Rate Optimizer provides a simple "one-click" GUI to handle this without digging through deep Windows Display Settings.

✨ Features

• Auto-Detection: Scans hardware to find the absolute maximum refresh rate supported by your current resolution.
• Quick Toggle: Instant buttons to set Max Hz or Reset to 60Hz.
• Win32 Integration: Uses user32.dll (EnumDisplaySettings and ChangeDisplaySettings) for low-level, reliable display manipulation.
• Safety First: Only applies modes that your monitor officially reports as supported.

🛠️ Technical Details

The application interacts directly with the Windows OS using P/Invoke (Platform Invocation Services).

Key Components:

• EnumDisplaySettings: Iterates through all display modes supported by the graphics card and monitor.
• ChangeDisplaySettings: Updates the Windows Registry and applies the new frequency in real-time.
• DEVMODE Struct: A precisely mapped structure to handle display device data in memory.

📥 Downloads

You can download the latest compiled version (executable) directly from the Releases page. Just download the .exe and Install it

🏗️ How to Build (For Developers)

1. Open the project in Visual Studio.
2. Ensure you have the .NET Desktop Development workload installed.
3. Build the solution as Release.
4. The .exe will be generated in the bin/Release folder.

📜 License

This project is licensed under the MIT License - see the LICENSE file for details.