⚠️ 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.
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.
Default clocks
- CPU: Up to 1963MHz (Mariko) / 1785MHz (Erista)
- GPU: Up to 1075MHz (Mariko) / 921MHz (Erista)
- RAM: Up to 1866/2133MHz (Mariko) / 1600MHz (Erista)
- Over/undervolting support
- Built-in configurator
- Compatible with most homebrew
It is recommended to read the guide before proceeding, as this can help you get a significant performance boost over the default settings, often times with less power draw and heat output
Installation
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Ensure you have the latest versions of
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Download and extract the Horizon OC Package to the root of your SD card.
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If using Hekate, edit
hekate_ipl.inito include:kip1=atmosphere/kips/hoc.kip(No changes needed if using fusee.)
Configuration
- Open the Horizon OC Overlay
- Open the settings menu
- Adjust your overclocking settings as desired. A helpful guide can be found here.
- Click Save KIP Settings to apply your configuration.
Building from Source
Refer to COMPILATION.md
Clock table
MEM clocks(mhz)
- 3200 → max on mariko, JEDEC.
- 2933 → JEDEC.
- 2666 → JEDEC.
- 2400 → max on erista, JEDEC.
- 2133 → Mariko JEDEC standard max (4266 Modules)
- 1996 → JEDEC standard
- 1866 → Mariko JEDEC standard max (3733 Modules)
- 1600 → official docked, boost mode, erista safe max, JEDEC.
- 1331 → official handheld, JEDEC.
- 1065
- 800
- 665
CPU clocks(mhz)
- 2703 → mariko absolute max, dangerous
- 2601 → unsafe
- 2499
- 2397 → mariko safe max with UV (low speedo)
- 2295
- 2193
- 2091
- 1963 → mariko no UV max clock
- 1887
- 1785 → erista no UV max clock, boost mode
- 1683
- 1581
- 1428
- 1326
- 1224 → sdev oc
- 1122
- 1020 → official docked & handheld
- 918
- 816
- 714
- 612 → sleep mode
GPU clocks(mhz)
- 1536 → absolute max clock on mariko. very dangerous
- 1459
- 1382
- 1305
- 1267 → NVIDIA T214(mariko) rating
- 1228 → mariko HiOPT safe clock
- 1152 → mariko SLT max clock
- 1075 → mariko no UV max clock. absolute max clock on erista. very dangerous
- 998 → NVIDIA T210(erista) rating
- 960 (erista only) → erista slt/hiopt safe max clock
- 921 → erista no UV max clock
- 844
- 768 → official docked
- 691
- 614
- 537
- 460 → max handheld
- 384 → official handheld
- 307 → official handheld
- 230
- 153
- 76 → boost mode
Notes:
- On Erista, CPU in handheld is capped to 1581MHz
- GPU overclock is capped at 460MHz on erista in handheld
- On Mariko, cap with No uv is 614MHz, with SLT it is 691MHz and with HiOPT it's 768MHz
- Clocks higher than 768MHz on erista need the official charger is plugged in.
- On Mariko, cap with No uv is 844MHz, with SLT it is 921MHz and with HiOPT it's 998MHz
Credits
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Lightos's Cat - Cat
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Souldbminer - hoc-clk and loader development
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Lightos - Loader patches development, hoc-clk development, guides
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SciresM - Atmosphere CFW
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CTCaer - L4T, Hekate, proper RAM timings
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KazushiMe - Switch OC Suite
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Hanai3bi (Meha) - Switch OC Suite, EOS, sys-clk-eos
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NaGaa95 - L4T-OC kernel, Status Monitor fork
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B3711 (halop) - EOS
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sys-clk team (m4xw, p-sam, natinusala) - sys-clk
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Dominatorul - Soctherm driver, guides, general help
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b0rd2death - Ultrahand sys-clk & Status Monitor fork
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MasaGratoR and ZachyCatGames - General help
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MasaGratoR - Status Monitor & Display Refresh Rate driver
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Dominatorul, Samybigio, Arcdelta, Miki, Happy, Flopsider, Winnerboi77, Blaise, Alvise, TDRR, agjeococh, frost, letum00, and Xenshen - Testing
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Samybigio2011, Miki - Italian translations
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angelblaster - Korean translations
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q1332348216-glitch - Chinese translations
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Nvidia - Tegra X1 Technical Reference Manual, soctherm driver, L4T