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⚠️ Disclaimer

THIS TOOL CAN BE DANGEROUS IF MISUSED. PROCEED WITH CAUTION. Due to the design of Horizon OS, overclocking RAM can cause NAND OR SD CORRUPTION. Ensure you have a full NAND, PROINFO, EMUMMC and SD backup before proceeding.

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About

Horizon OC is an open-source overclocking tool for Nintendo Switch consoles running Atmosphere custom firmware. It enables advanced CPU, GPU, and RAM tuning with user-friendly configuration tools.

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Features

• CPU: Up to 1963MHz (Mariko) / 1785MHz (Erista)
• GPU: Up to 1075MHz (Mariko) / 921MHz (Erista)
• RAM: Up to 1866MHz (Mariko) / 1600MHz (Erista)
• Over/undervolting support
• Built-in configurator
• Compatible with most homebrew

Higher (potentially dangerous) frequencies are unlockable via configuration. Erista and Mariko units can usually push a bit further fully safely with a bit of undervolting, however this may not work on all units. The exact maximum overclock possible varies per console, although most consoles should be able to do this safely.

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Installation

1. Ensure you have the latest versions of

   • Atmosphere
   • Ultrahand Overlay

2. Download and extract the Horizon OC Package to the root of your SD card.

3. If using Hekate, edit hekate_ipl.ini to include:

   kip1=atmosphere/kips/hoc.kip
   secmon=exosphere.bin
   

   (No changes needed if using fusee.)

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Configuration

1. Open the Horizon OC Overlay
2. Open the settings menu
3. Adjust your overclocking settings as desired.
4. Click Save KIP Settings to apply your configuration.

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Building from Source

Refer to COMPILATION.md

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Credits

• Lightos's Cat - Cat

• Souldbminer – hoc-clk and loader development

• Lightos – loader patches development

• SciresM - Atmosphere CFW

• KazushiMe – Switch OC Suite

• hanai3bi (meha) – Switch OC Suite, EOS, sys-clk-eos

• NaGaa95 – L4T-OC-kernel

• B3711 (halop) – EOS

• sys-clk team (m4xw, p-sam, natinusala) – sys-clk

• b0rd2death – Ultrahand sys-clk & Status Monitor fork

• MasaGratoR and ZachyCatGames - General help

• MasaGratoR - Status Monitor & Display Refresh Rate Driver

• Dom, Samybigio, Arcdelta, Miki, Happy, Flopsider, Winnerboi77, Blaise, Alvise, TDRR, agjeococh and Xenshen - Testing

• Samybigio2011 - Italian translations