Arccalc

Arccalc / Dwmfix

Public

Lightweight Windows utility to fix secondary monitor stuttering by preventing DWM composition throttling

19
0
85% credibility
Found May 19, 2026 at 21 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
Python
AI Summary

DWMfix is a background utility that solves a common Windows 11 problem: stuttering or lag on secondary monitors during gaming or full-screen applications. It works by keeping a tiny, invisible window constantly refreshing on your selected displays, which tricks Windows into keeping the display system running at full speed instead of throttling it for power savings. The tool provides a simple control panel where you can choose which monitors to fix, toggle a more powerful boost mode if needed, and set it to start automatically with Windows. Once running, it sits quietly in your system tray, ensuring your multi-monitor setup stays smooth and responsive.

How It Works

1
🎮 You notice stuttering on your second monitor

While gaming or working, your secondary display starts lagging or stuttering, making everything feel choppy.

2
🔍 You discover DWMfix online

You find a tool that promises to fix your dual monitor stuttering by keeping your displays running smoothly.

3
📥 You download and run the program

A simple control panel appears where you can choose which monitors to fix and adjust the settings.

4
You customize your experience
🖥️
Select your monitors

Pick your secondary displays from a list so the tool knows exactly where to work.

🚀
Enable boost mode

If stuttering continues, turn on boost mode for more aggressive performance.

📋
Set it to start automatically

Have the tool run in the background every time you turn on your computer.

5
👀 You hide it to the system tray

The program minimizes to your system tray, running quietly in the background while you work or play.

✨ Your monitors stay smooth and stutter-free

Windows keeps your displays in high-performance mode, and everything feels responsive and fluid.

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Star Growth

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AI-Generated Review

What is Dwmfix?

Dwmfix is a lightweight Windows utility written in Python that prevents stuttering on secondary monitors by keeping the Desktop Window Manager from throttling composition. It runs in the system tray and places invisible rendering windows on your selected displays, forcing Windows to maintain high-performance GPU composition instead of dropping into power-saving mode. The control panel lets you toggle boost mode, select which monitors to fix, and hide everything to the background while you game or work.

Why is it gaining traction?

Windows 11 aggressive energy-saving features have made secondary monitor stutter a common complaint with no good official solutions. Dwmfix offers a simple, one-click fix that works immediately without configuration or system tweaking. The boost mode escalation when default settings are not enough gives users a clear upgrade path, and the system tray integration means it stays out of your way once configured.

Who should use this?

Gamers running dual monitors on Windows 11 who notice judder or micro-stutters during gameplay will get the most immediate benefit. Developers working with multi-monitor setups who experience distracting lag on secondary displays can use this as a background utility without impacting their workflow. Power users who want to squeeze maximum performance from their existing hardware without driver changes or BIOS tweaks will find this a practical workaround.

Verdict

Dwmfix solves a real, frustrating problem with minimal overhead. The credibility score of 0.8500000238418579% reflects a well-scoped tool targeting a specific pain point, but only 19 stars means limited community validation. Test it on your system and keep it running if it works for you.

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