Horizon OC
Advanced Open Source Overclocking Tool for Nintendo Switch (Atmosphere CFW)
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[](https://discord.com/invite/S3eX47dHsB)
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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](https://github.com/Atmosphere-NX/Atmosphere)
- [Ultrahand Overlay](https://github.com/ppkantorski/Ultrahand-Overlay)
2. Download the latest `hoc.kip` from the [Releases](../../releases) tab.
3. If using **Hekate**, edit `hekate_ipl.ini`:
```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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