170 lines
5.0 KiB
Markdown
170 lines
5.0 KiB
Markdown
# sys-clk-OC
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Switch sysmodule allowing you to set cpu/gpu clocks according to the running application and docked state.
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### Notes:
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- **No GPU capping on Mariko** (Hoag/Iowa/Aula)
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- Ability to **set RAM clocks is removed**, please use sys-clk-OC with **[ptm patch](https://github.com/KazushiMe/Switch-OC-Suite/blob/master/Source/Patch/12-ptm.pchtxt)**
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## Clock table (MHz)
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### CPU clocks
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* 2397 → max for Mariko
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* 2295 → max for Mariko (stable)
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* 2193
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* 2091
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* 1963 → official max for Mariko
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* 1887
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* 1785 → official boost mode
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* 1683
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* 1581
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* 1428
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* 1326
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* 1224 → sdev oc
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* 1122
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* 1020 → official docked & handheld
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* 918
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* 816
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* 714
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* 612
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### GPU clocks
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* 1344 → max for Mariko
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* 1305 → max for Mariko (stable)
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* 1267 → official max for Mariko
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* 1228
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* 1152
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* 1075
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* 998
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* 921 → official max for Erista
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* 844
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* 768 → official docked
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* 691
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* 614
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* 537
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* 460 → max handheld
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* 384 → official handheld
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* 307 → official handheld
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* 230
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* 153
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* 76 → boost mode
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### MEM clocks (only for reference)
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From Hekate Minerva module [sys_sdrammtc.c](https://github.com/CTCaer/hekate/blob/197ed8c319bd4132e4d7571ce037d4a27f806bba/modules/hekate_libsys_minerva/sys_sdrammtc.c#L67)
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- 2131 → max for Erista (with over-voltage)
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- 2099
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- 2064
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- 1996 → max for Mariko
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- 1932
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- 1894
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- 1862 → stable max for Mariko (stable on most DRAM chips except Hynix ones), max for Erista (without over-voltage)
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- 1795
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- 1728
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- 1600 → official docked & official boost mode
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- 1331 → official handheld
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- 1065
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- 800
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- 665
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## Installation
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The following instructions assumes you have a Nintendo Switch running Atmosphère, updated to at least the latest stable version.
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Copy the `atmosphere`, and `switch` folders at the root of your sdcard, overwriting files if prompted. Also copy the `config` folder if you're not updating, to include default settings.
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**Note:** sys-clk-overlay requires to have [Tesla](https://gbatemp.net/threads/tesla-the-nintendo-switch-overlay-menu.557362/) installed and running
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## Relevant files
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* Config file allows one to set custom clocks per docked state and title id, described below
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`/config/sys-clk/config.ini`
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* Log file where the logs are written if enabled
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`/config/sys-clk/log.txt`
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* Log flag file enables log writing if file exists
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`/config/sys-clk/log.flag`
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* CSV file where the title id, profile, clocks and temperatures are written if enabled
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`/config/sys-clk/context.csv`
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* sys-clk manager app (accessible from the hbmenu)
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`/switch/sys-clk-manager.nro`
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* sys-clk overlay (accessible from anywhere by invoking the [Tesla menu](https://gbatemp.net/threads/tesla-the-nintendo-switch-overlay-menu.557362/))
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`/switch/.overlays/sys-clk-overlay.ovl`
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* sys-clk core sysmodule
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`/atmosphere/contents/00FF0000636C6BFF/exefs.nsp`
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`/atmosphere/contents/00FF0000636C6BFF/flags/boot2.flag`
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## Config
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Presets can be customized by adding them to the ini config file located at `/config/sys-clk/config.ini`, using the following template for each app
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```
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[Application Title ID]
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docked_cpu=
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docked_gpu=
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handheld_charging_cpu=
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handheld_charging_gpu=
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handheld_charging_usb_cpu=
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handheld_charging_usb_gpu=
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handheld_charging_official_cpu=
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handheld_charging_official_gpu=
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handheld_cpu=
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handheld_gpu=
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```
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* Replace `Application Title ID` with the title id of the game/application you're interested in customizing.
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A list of games title id can be found in the [Switchbrew wiki](https://switchbrew.org/wiki/Title_list/Games).
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* Frequencies are expressed in mhz, and will be scaled to the nearest possible values, described in the clock table below.
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* If any key is omitted, value is empty or set to 0, it will be ignored, and stock clocks will apply.
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* If charging, sys-clk will look for the frequencies in that order, picking the first found
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1. Charger specific config (USB or Official) `handheld_charging_usb_X` or `handheld_charging_official_X`
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2. Non specific charging config `handheld_charging_X`
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3. Handheld config `handheld_X`
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### Example 1: Zelda BOTW
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* Overclock CPU when docked or charging
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Leads to a smoother framerate overall (ex: in the korok forest)
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```
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[01007EF00011E000]
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docked_cpu=1224
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handheld_charging_cpu=1224
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```
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### Example 2: Picross
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* Underclocks on handheld to save battery
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```
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[0100BA0003EEA000]
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handheld_cpu=816
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handheld_gpu=153
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```
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### Advanced
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The `[values]` section allows you to alter timings in sys-clk, you should not need to edit any of these unless you know what you are doing. Possible values are:
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| Key | Desc | Default |
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|:-----------------------:|-------------------------------------------------------------------------------|:-------:|
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|**temp_log_interval_ms** | Defines how often sys-clk log temperatures, in milliseconds (`0` to disable) | 0 ms |
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|**csv_write_interval_ms**| Defines how often sys-clk writes to the CSV, in milliseconds (`0` to disable) | 0 ms |
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|**poll_interval_ms** | Defines how fast sys-clk checks and applies profiles, in milliseconds | 300 ms |
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