Switch OC Suite

Overclocking suite for Horizon OS (HOS) running on Atmosphere CFW.

DISCLAIMER: USE AT YOUR OWN RISK!

• Overclocking in general will shorten the lifespan of some hardware components.

• Due to HorizonOS design, instabilities from unsafe RAM clocks may cause filesystem corruption. Always make backup before usage.

Features

• Erista variant (HAC-001)

  • DRAM Overclock

    • Safe: 1862.4 MHz
    • Unsafe:
      • DRAM bus overvolting

  • Modded sys-clk and ReverseNX-RT

    • CPU & GPU frequency governor (Experimental)
    • Fast-charging (2A) toggle, set charge limit (20% - 100%)
    • Global Profile
    • Sync ReverseNX Mode

• Mariko variant (HAC-001-01, HDH-001, HEG-001)

  • CPU / GPU Overclock

    • Safe: 1963 / 921 MHz
    • Unsafe:
      • Enable "Allow Unsafe Frequencies" in overlay to unlock frequencies up to 2397 / 1305 MHz
      • See README for sys-clk-OC

  • DRAM Overclock

    • Safe: 1996.8 MHz with built-in timing adjustment
    • Unsafe:
      • DRAM bus overvolting.

  • Modded sys-clk and ReverseNX-RT

    • Auto CPU Boost
    • CPU & GPU frequency governor (Experimental)
    • Fast-charging (2A) toggle, set charge limit (20% - 100%)
    • Global Profile
    • Sync ReverseNX Mode

• Auto CPU Boost

  • For faster game loading
  • Enable CPU Boost (1785 MHz) when CPU Core#3 (System Core) is stressed (mainly I/O operations).
  • Effective only when charger is connected.

• CPU & GPU frequency governor (Experimental)

  • Adjust frequency based on load. Might decrease power draw but can introduce stutters. Can be turned off for specific titles.

• Fast-charging (2A) toggle, set charge limit (20% - 100%)

  • Long-term use of charge limit may render the battery gauge inaccurate. Performing full cycles could help recalibration, or try battery_desync_fix_nx.

• Global profile

  • Designated a dummy title id 0xA111111111111111.
  • Priority: "Temp overrides" > "Application profile" > "Global profile" > "System default".

• Sync ReverseNX Mode

  • No need to change clocks manually after toggling modes in ReverseNX (-RT and -Tool)

• System Settings (Optional)

Installation

1. Download latest release.

2. Copy all files in SdOut to the root of SD card.

3. Grab x.x.x_loader.kip for your Atmosphere version, rename it to loader.kip and place it in /atmosphere/kips/.

4. Customization via online loader configurator:

   Defaults	Mariko	Erista
   CPU OC	2397 MHz Max	Disabled
   CPU Boost	1785 MHz	N/A
   CPU Volt	1220 mV Max	Disabled
   GPU OC	1305 MHz Max	N/A
   RAM OC	1996 MHz Max	1862 MHz Max
   RAM Volt	N/A	Disabled
   RAM Timing	Auto-Adjusted	Disabled

5. Hekate-ipl bootloader Only

   • Add kip1=atmosphere/kips/loader.kip to boot entry section in bootloader/hekate_ipl.ini.

Deprecated: patching sysmodules manually

This method is only served as reference as it could damage your MMC file system if not handled properly.

Patched sysmodules would be persistent until pcv or ptm was updated in new HOS (normally in x.0.0).

Tools:

• Lockpick_RCM
• TegraExplorer
• hactool
• nx2elf
• elf2nso from switch-tools
• hacpack

1. Dump prod.keys with Lockpick_RCM
2. Dump HOS firmware with TegraExplorer
3. Configure and run test_patch.sh to generate patched pcv & ptm sysmodules in nca
4. Replace nca in SYSTEM:/Contents/registered/ with TegraExplorer
5. ValidateAcidSignature() should be stubbed to allow unsigned sysmodules to load (a.k.a. loader_patch)

Build

Grab necessary patches from the repo, then compile sys-clk, ReverseNX-RT and Atmosphere loader with devkitpro.

If you are to install nro forwarders, stub ValidateAcidSignature() with R_SUCCEED(); in Atmosphere/stratosphere/loader/source/ldr_meta.cpp to make them work again.

Uncompress the kip to make it work with configurator: hactool -t kip1 Atmosphere/stratosphere/loader/out/nintendo_nx_arm64_armv8a/release/loader.kip --uncompress=./loader.kip

Acknowledgement

• CTCaer for Hekate-ipl bootloader, RE and hardware research
• devkitPro for All-In-One homebrew toolchains
• masagrator for ReverseNX-RT and info on BatteryChargeInfoFields in psm module
• Nvidia for Tegra X1 Technical Reference Manual
• RetroNX team for sys-clk
• SciresM and Reswitched Team for the state-of-the-art Atmosphere CFW of Switch
• Switchbrew wiki for Switch in-depth info
• ZatchyCatGames for RE and original OC loader patches for Atmosphere