Horizon OC

Advanced Open Source Overclocking Tool for Nintendo Switch (Atmosphere CFW)

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⚠️ Disclaimer

THIS TOOL CAN BE DANGEROUS IF MISUSED. PROCEED WITH CAUTION.
Overclocking RAM can cause NAND DAMAGE due to Horizon OS design.
Always ensure you have a full NAND backup before proceeding.

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🌀 About

Horizon OC is an open-source overclocking suite for Nintendo Switch consoles running Atmosphere custom firmware.
It provides safe and flexible control over CPU, GPU, and RAM frequencies, with a modern configuration utility.

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🚀 Features

✅ CPU up to 2397MHz (Mariko) / 2091MHz (Erista)
✅ GPU up to 1305MHz (Mariko) / 998MHz (Erista)
✅ RAM up to 3200MHz (Mariko) / 2360MHz (Erista)
✅ Overclock & undervolt support
✅ Built-in configuration tool
✅ Compatible with most homebrew

⚡ Higher (potentially dangerous) frequencies are unlockable.
⚙️ Exact maximums vary per console.

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🧩 Installation

1. Install the latest versions of:

   • Atmosphere
   • Ultrahand Overlay

2. Download the latest hoc.kip from the Releases tab.

3. If using Hekate, edit hekate_ipl.ini:

   kip1=atmosphere/kips/*
   

*(No edits needed if using fusee.)*

4. Download and extract the **Horizon OC sysmodule** to your SD card root.
5. Optionally, use the **Configurator** to install automatically via GUI.

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## ⚙️ Configuration

1. Download the **Configurator** on your PC.
2. Run the executable.
3. Select your SD card or UMS device.
4. Adjust frequency settings.
5. Click **Save** to apply your configuration.

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## 🧱 Building from Source

1. Set up a build environment for **Atmosphere**.
2. Clone the repo:

   ```bash
   git clone https://github.com/Atmosphere-NX/Atmosphere.git
   ```
3. Move it into the `build/` folder.
4. Copy your `Source/stratosphere` folder into `build/`.
5. Build with:

   ```bash
   ./build.sh
   ```

**Build the Configurator:**

```bash
cd Source/Configurator
build.bat
# or
python -m PyInstaller --onefile --add-data "assets;assets" --icon=assets/icon.ico --noconsole src/main.py
```

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## 💎 Credits

| Contributor                     | Contribution           |
| ------------------------------- | ---------------------- |
| **Lightos**, **Dominatorul**    | RAM timings            |
| **KazushiMe**, **meha**         | Switch-OC-Suite        |
| **sys-clk team**                | sys-clk base           |
| **b0rd2death**                  | Ultrahand sys-clk fork |
| **Lightos**, **Sammybigio2011** | Early testing          |

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<div align="center">

💻 *Built with ❤️ by the Horizon OC community* <br>
⭐ Star this repo if you find it useful!

</div>