Modern smartphones offer many opportunities for customizing performance and comfort of use. One of the key parameters that affects the smoothness of the interface and the quality of the picture in games is screen refresh rate. Many users are wondering how to adjust the Hertz clock on Android in order to achieve maximum smoothness or, conversely, extend the battery life of the device.
In addition to the display, there is another aspect of adjusting the frequencies - this is the work of the clock generator central processor. Changing the core frequency can have a significant impact on processing speed, but requires caution. In this article, we will examine both aspects in detail: standard methods for changing the display hertz and advanced methods for controlling the frequency of the processor.
It is worth noting right away that the customization options greatly depend on the manufacturer of your gadget and the version of the operating system. If you have a recent flagship device, most likely you will find the options you need in the standard menu. For older models or specific tasks, you may need root access or specialized software.
What is Hertz and why change it
The screen refresh rate, measured in Hertz (Hz), shows how many times per second the image is displayed on the display redrawn. For many years, the standard value was 60 Hz, which means 60 frames per second. However, modern technologies have stepped forward, and now the standard for top smartphones is 90 Hz, 120 Hz and even higher.
Increasing this parameter makes the interface animations, scrolling social media feeds and object movement in games are visually smoother and more pleasing to the eye. High Hertz frequency reduces input lag, which is critical for competitive shooters and fast-paced applications. However, you have to pay for smoothness with increased power consumption.
On the other hand, lowering the frequency can be a useful saving tool. If you're reading static text or listening to music, a high refresh rate is overkill. Some systems allow you to adapt this setting automatically, but manual control gives the user more freedom to balance performance and battery life.
⚠️ Attention: Forcing an unsupported refresh rate through the engineering menu or third-party applications can result in screen artifacts, flickering, or a complete black screen. Always check the specifications of your panel before experimenting.
Changing the screen refresh rate in the settings
The safest and recommended way to configure is to use the built-in system tools. Smartphone manufacturers are increasingly bringing these options to the surface of the interface so that users can independently manage the balance of performance. Typically this section is located in the display menu.
To access the settings, go to Settings → Display → Refresh rate. Depending on the shell (MIUI, OneUI, ColorOS, etc.), the path may differ slightly. Here you will be asked to choose between standard mode and high frequency mode. In some cases, the “Automatic selection” item is available, which dynamically changes the hertz depending on the content.
- 📱 Standard mode (usually 60 Hz) ensures maximum energy efficiency and compatibility with all applications.
- 🚀 High frequency (90/120 Hz) gives a smooth picture, but drains the battery faster and can cause heating.
- 🔄 Adaptive Mode tries to find a middle ground, lowering the Hertz in static scenes and increasing it when scrolling.
If there is no explicit switch in the menu, your smartphone may only support a fixed frequency or use adaptive sync technology without the ability to manually select. Owners of devices Samsung Galaxy or Xiaomi should pay attention to the “Advanced settings” section inside the screen menu.
If you play heavy games, try temporarily switching to the standard frequency. This will reduce the load on the GPU and reduce throttling (reduced performance due to overheating).
Configuration through the developer menu
In some cases, the standard menu hides additional features available through the developer mode. This section is intended for debugging applications, but also contains useful tools for fine-tuning the system. To activate it, you need to click on the build number several times in the “About phone” section.
After activation, a new item will appear in the main settings For developers. Inside this section you can find options related to animation and rendering. Although there may not be a direct adjustment of the screen speed here, parameters like “Animation Scale” can subjectively speed up the perception of the interface. Also here you can find settings for simulating additional displays, which sometimes affect rendering.
Be careful when changing parameters in this menu. Incorrect configuration can lead to unstable system operation or failure of individual applications. It is recommended to write down the original values before making changes so that you can easily return to the factory settings.
How to enable the developer menu?
Go to Settings → About phone. Find “Build Number” and quickly click on it 7 times in a row. After this, a notification will appear indicating that you have become a developer.
⚠️ Attention: The developer menu interface may differ on different versions of Android. What is available on stock Android 14 may be missing or moved in manufacturers' skins.
CPU control
When it comes to “tuning the Hertz” in the context of performance, it often means overclocking or undervolting the processor. The operating frequency of the CPU cores determines how many operations the device can perform per unit of time. Managing this parameter requires obtaining root access, since access to the system kernel is closed by default.
To change the processor frequency, special controller applications are used, such as Kernel Adiutor, Franco Kernel Manager or 3C All-in-One Toolbox. These utilities allow you to set the minimum and maximum frequency for each cluster of cores (energy-efficient and productive). You can also select gouvernors - algorithms that control dynamic frequency changes.
| Parameter | Description | Impact |
|---|---|---|
| Min Frequency | Minimum core frequency | Determines the responsiveness of the system in simple |
| Max Frequency | Maximum core frequency | Limits peak performance and heating |
| Governor | Control algorithm | Balance between response speed and economy |
| Undervolting | Voltage reduction | Reduces heat, but may cause instability |
Correctly setting these parameters can extend battery life or squeeze out extra frames in games. However, an unjustified increase in maximum frequencies will lead to rapid overheating and subsequent throttling, when the system itself sharply reduces performance to protect components.
☑️ Preparing to overclock the processor
Using third-party applications and ADB
If getting root access is not part of your plans, you can try using USB debugging capabilities via a computer. The tool ADB (Android Debug Bridge) allows you to send commands to the system, bypassing the graphical interface. This is a more complex method that requires a PC and installed drivers.
Using ADB, you can try to change display settings that are hidden from the user. For example, a command to change screen density or emulate refresh rate may work on some devices. To do this, connect your smartphone to your computer, enable USB debugging and enter the command in the terminal:
adb shell wm size 1080x2400
adb shell settings put system peak_refresh_rate 120
It is worth understanding that support for such commands depends on display drivers and manufacturer policies. On many modern devices, these commands can be ignored by the security system. In addition, there are applications from Google Play that emulate high frequencies by interpolating frames, but this is only a visual illusion that does not provide a real increase in smoothness.
Deep modification often requires the installation of custom kernels (Custom Kernels). Community developers create cores with unlocked voltage and frequency control capabilities. It is better to search for a suitable kernel for your device model on specialized forums such as w3bsit3-dns.com or XDA Developers.
Using ADB and custom kernels gives maximum control, but carries high risks. An error in setting the voltage can physically damage the processor or lead to a “brick” of the device.
Problems and application compatibility
Even if you managed to set up a high Hertz, you may encounter that some applications do not support this mode. Games and video players may force the screen to switch to 60Hz if the content is not optimized. This is especially true for older applications or videos shot at low frame rates.
In such cases, the system may behave unpredictably: there may be jerks, desynchronization of sound and image, or increased resource consumption for frame conversion. Some manufacturers implement a feature to force games to run in high mode, but this does not guarantee stable operation.
- 🎮 Games: Check the settings inside the game itself. Often, the “High FPS” option must be enabled manually in the graphics menu.
- 🎬 Video: YouTube and streaming services usually adjust to the content. 60 fps video will be smooth, 30 fps will not, regardless of the screen speed.
- 📱 Social networks: Instagram or VK feeds can work smoothly, but heavy stories with effects can slow down due to code optimization, not screen frequency.
It is also worth considering the influence of ambient temperature. In hot weather or under prolonged load, the system can automatically reduce the refresh rate and the processor to avoid overheating. This is normal behavior of the protective mechanisms of a modern smartphone.
⚠️ Attention: The characteristics of the screens and the possibility of overclocking the processor depend on the specific hardware revision. Even identical phone models released at different times may have different matrices and power controllers.
Frequently asked questions (FAQ)
Is it safe to constantly use 120 Hz on a smartphone?
Using 120 Hz is safe for hardware, since screens are designed for such a load. The main disadvantage is accelerated battery wear due to increased energy consumption. If autonomy is more important to you than smoothness, it is better to use adaptive mode.
Is it possible to overclock a processor without root access?
Without superuser rights, direct access to core clock frequencies is closed. You can only indirectly influence performance by closing background applications or using game boosters built into the manufacturer's shell, but real overclocking is impossible.
Why did the Hertz setting disappear after updating Android?
Manufacturers often change the operating logic in new versions of the software. Perhaps the option was moved to another menu, combined with the energy saving mode, or it was decided to leave only automatic adjustment. Check the “Battery” section or update the firmware to the latest version.
Does processor frequency affect photo quality?
Indirectly, yes. High frequency helps to process the image faster, especially in HDR or night photography modes where complex computational photography is required. However, the matrix and optics themselves are not affected by the CPU frequency.
What to do if the screen starts flickering after changing the settings?
Immediately return the settings to the factory values. If the change was made through a third-party application, delete it. If the flickering remains after a reboot, the driver may have failed and you will need to reset the device to factory settings (Hard Reset).