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<div align="center">
<!-- 🌌 Banner / Title -->
<h1 align="center">
<img src="assets/logo.png" alt="logo" width="120"/><br>
<span style="font-size: 2.5rem; background: linear-gradient(90deg, #E60012, #5865F2, #0078D4); -webkit-background-clip: text; -webkit-text-fill-color: transparent;">
Horizon OC
</span>
</h1>
![alt text](assets/logo.png "logo")
<p align="center">
<i>Advanced Open Source Overclocking Tool for Nintendo Switch (Atmosphere CFW)</i>
</p>
---
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---
</div>
### DISCLAIMER: THIS TOOL CAN BE DANGEROUS IF MISUSED. PROCEED WITH CAUTION
* Due to the design of Horizon OS, overclocking RAM can cause **NAND DAMAGE**. Ensure to have a NAND Backup<br>
## ⚠️ Disclaimer
A open source overclocking tool for Nintendo Switch consoles running Atmosphere custom firmware<br>
> **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.
---
## Features:
CPU overclock up to 2397MHz on Mariko units, 2091MHz on Erista units<br>
GPU up to 1305MHz on Mariko units, 998MHz on Erista units<br>
RAM up to 3200MHz on Mariko units, 2360MHz on Erista units<br>
Over/undervolting<br>
Configurator<br>
Works with most homebrew<br>
## 🌀 About
*Higher (potentially dangerous) frequencies are unlockable*<br>
*The exact maximum overclock varies per console*<br>
## Installation
Ensure you have the latest version of [Atmosphere](https://github.com/Atmosphere-NX/Atmosphere) and [Ultrahand](https://github.com/ppkantorski/Ultrahand-Overlay) installed before continuing<br>
Grab latest hoc.kip from releases tab<br>
If using hekate, edit hekate_ipl.ini to include "kip1=atmosphere/kips/*". No need for editing if using fusee<br>
Download latest Horizon OC sysmodule from releases tab<br>
Extract sysmodule into root of SD card<br>
**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.
Alternatively, you can download the configurator and click the two install buttons<br>
---
## 🚀 Features
## Configuration
Download the latest configurator on your computer<br>
Run the file<br>
Select the drive your SD card or UMS device is mounted as<br>
Configure the kip to your liking, and in the end, save it<br>
✅ 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
## Building
Set up a development enviorment ready to compile Atmosphere<br>
Git clone Atmosphere, and move the cloned folder into build/<br>
Insert Source/stratosphere folder into build/<br>
Run build.sh
> ⚡ *Higher (potentially dangerous) frequencies are unlockable.*
> ⚙️ *Exact maximums vary per console.*
To build the configurator, cd into Source/Configurator<br>
Run build.bat or run "python -m PyInstaller --onefile --add-data "assets;assets" --icon=assets/icon.ico --noconsole src/main.py"<br>
---
## 🧩 Installation
## Credits
Lightos for RAM timings<br>
KazushiMe and meha for Switch-Oc-Suite<br>
sys-clk team for sys-clk<br>
b0rd2death for Ultrahand sys-clk fork<br>
Lightos and Sammybigio2011 for early testing<br>
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.
---
## ⚙️ 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.
---
## 🧱 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
```
---
## 💎 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 |
---
<div align="center">
💻 *Built with ❤️ by the Horizon OC community* <br>
⭐ Star this repo if you find it useful!
</div>