Xiaomi smartphone users often wonder what kind of "iron" is hidden inside their device, especially when it comes to performance in games or energy efficiency in everyday tasks. ARM What's missing is not a specific chip brand, but the architecture that Qualcomm, MediaTek and Samsung engineers use to build their solutions. ARM-The processor is used in your model, helps to correctly assess the potential of the gadget and avoid the disappointment of buying a weak device.
Xiaomi’s mobile technology is dominated by chips built on ARM licenses, whether it’s flagship Snapdragon or budget Helio. However, just knowing the name of the processor model is not enough – it’s important to understand the configuration of the cores, because it depends on how quickly a heavy application opens or how long the phone survives without recharging. In this article, we will discuss in detail how Xiaomi processors are built, what the Cortex cores differ and why the architecture version is critical.
Many people mistakenly believe that more gigahertz always means better, but in today's SoCs, things are much more complicated. Engineers use heterogeneous computing, where different cores are responsible for different tasks, and understanding this logic will allow you to fine-tune the system. Let's dive into the technical details so that you can classify a device with your eyes closed by its specifications.
What is hidden behind the acronym ARM in Xiaomi smartphones
ARM (Advanced RISC Machines) is the de facto standard for the entire mobile industry, including Xiaomi products. Unlike the x86 architecture used by Intel and AMD processors in computers, ARM is focused on minimal power consumption while maintaining high processing power, which is why your Redmi and Poco smartphones are able to run all day on a single battery charge, performing complex calculations.
It's important to understand that ARM Holdings doesn't make chips physically, it only develops instructions and core designs that it then licenses to manufacturers. Xiaomi, in turn, buys off-the-shelf solutions from Qualcomm and MediaTek or develops its own Surge chips, which are also based on the ARM architecture. So when you ask "what ARM," you're actually asking about the version of the Cortex cores used in the processor.
There are several generations of this architecture, and each generation brings performance gains and energy efficiency improvements. For example, the transition from ARMv8 to ARMv9 has dramatically accelerated the work with artificial intelligence and machine learning directly on the device. In older Xiaomi models, you can find ARMv7 cores, which are already considered obsolete and do not support many modern applications.
⚠️ Note: Don’t confuse the instruction set architecture (ARMv8, ARMv9) The architecture is the foundation, and the model is a concrete building built on that foundation with its own characteristics.
For the average user, knowledge of the architecture version is important primarily when installing third-party software, emulators or custom firmware. Some Android modifications and specialized applications require a strictly defined set of instructions, and installing an inappropriate version can lead to unstable system operation or complete failure to start software.
Types of Cortex cores in Xiaomi processors: from energy efficiency to power
At the heart of any Xiaomi processor are the Cortex cores, which fall into three main categories for performance and power consumption. Understanding the difference between them allows you to predict the behavior of a smartphone in different use cases.
The first is energy-efficient cores, often referred to as Cortex-A5x (e.g., A53, A55), which consume minimal power and are used for background tasks such as listening to music, waiting for calls or working messengers in sleep mode. In budget Redmi Note smartphones, these cores can make up most of the processing power, which provides excellent autonomy, but limits the speed of the game.
The second type is powerful cores like the Cortex-A7x (A76, A78), which are what come into play when you open a heavy app, flip through a social media feed, or run a navigator. These cores are capable of delivering high frequency, but also consume battery power much faster. In today's Xiaomi chips, they often work in tandem with newer, heavy-duty cores.
The third type is premium cores like the Cortex-X series, which appear in Xiaomi and Xiaomi’s flagship Black Shark models, designed to provide instantaneous system response and maximum FPS in demanding games, but their work is short-lived: the system quickly resets frequency to avoid overheating, transferring the load back to more efficient cores.
💡
When choosing a smartphone, pay attention not only to the number of cores, but also to their type. Four cores Cortex-A78 will work faster and more efficiently than eight outdated Cortex-A53.
The combination of these cores forms what is known as a big.LITTLE or DynamIQ scheme. Cheap models often have only “small” cores, which creates the illusion of multitasking, but in practice leads to brakes when switching tasks.
Snapdragon vs MediaTek Platforms: What’s the Difference for Users
The two main chip suppliers for Xiaomi are Qualcomm, a U.S. company, and MediaTek, Taiwan. Both use ARM architecture but implement it differently, which directly affects the experience. Snapdragon is traditionally considered more optimized for cameras and games, and better supports custom firmware developers.
MediaTek processors (Helio and Dimensity series) often offer better price-performance ratios. In recent generations, such as the Dimensity 9000, they even outperformed competitors in energy efficiency tests. However, owners of devices on MediaTek may face a more complex process of unlocking the bootloader and fewer modified firmware available.
The key difference lies in the graphics accelerator (GPU). Qualcomm uses its own Adreno graphics, which have excellent drivers and emulator support. MediaTek relies on ARM's Mali or Immortalis graphics. For the average user, this may be invisible, but for gamers, the difference in game optimization can be as much as 20% FPS.
Also worth noting is the communication modems. Snapdragon has traditionally led the way in this component, providing more stable signal reception and support for a wider range of 4G/5G frequencies. If you travel frequently or live in an area of uncertain reception, the model on Snapdragon can run more stable, even if the MediaTek processor is formally more powerful in benchmarks.
How to find out the exact model of the processor and the version of the ARM kernel
Determine which one ARM-The chip is in your device, in a number of ways that don't require much technical knowledge. The easiest method is to use system settings, although manufacturers often hide parts there.
It is recommended to install an annex CPU-Z or AIDA64. In the "System" section, or «SOC» You will see the full name of the model (for example, SM8475 For Snapdragon 8 Gen 1, it will also show the instruction architecture, the number of cores and their current frequency, and it's the most reliable way to get reliable data.
For advanced users with root rights or a debugger enabled, the method is available through ADB (Android Debug Bridge), connecting the phone to a computer, you can enter a command to get detailed information about the processor directly from the system.
adb shell cat /proc/cpuinfoThis command will list all the cores with their identifiers and characteristics. You can also use the getprop ro.product.board command to find the code name of the platform, which is easy to find the full specifications on the Internet. Notice the field "CPU implementer" and "CPU part", which indicate the manufacturer and the type of kernel, respectively.
☑️ Processor performance check
You can't trust the About Phone menu in the Processor section unless you have a specific model. Often, Xiaomi just says "Eight-core CPU," which doesn't tell the power user anything at all. Only an accurate model can give you an estimate of the actual power of the device.
Comparative table of popular chips in Xiaomi devices
To make it easier for you to navigate the sea of models, we have compiled a comparison table of popular processors found in current and recent smartphones of the brand, which lists the key characteristics that affect everyday use.
| Model chip. | Architecture of nuclei | Technique | Class of devices |
|---|---|---|---|
| Snapdragon 8 Gen 2 | 1x Cortex-X3, 4x A715, 3x A510 | 4nm | Flagship |
| Dimensity 8300 | 4x Cortex-A715, 4x A510 | 4nm | Middle class |
| Snapdragon 680 | 4x Cortex-A73, 4x A53 | 6 nm | Budgetary |
| Helio G99 | 2x Cortex-A76, 6x A55 | 6 nm | Budgetary/medium |
As you can see from the table, even in the same class of devices, you can use completely different combinations of cores. For example, in the budget segment, the old but proven Cortex-A73 still occurs on a par with the newer A76, the difference between them will be noticeable in the speed of processing graphics and support for modern video codecs.
Process technology (4nm vs. 6nm) also plays a huge role. A thinner process means that transistors are smaller, there are more on the chip, and they warm less. So a smartphone with a Snapdragon 680 (6nm) can warm up more when loaded than a more modern 4nm counterpart, even if their performance is similar.
⚠️ Note: When buying a used device, be sure to check the processor model through CPU-Z. Unscrupulous sellers can refashion the software so that the name of a more powerful model is displayed in the About Phone menu.
When choosing between devices of different years of release, focus not only on the name of the series, but also on the year of the release of the chip. The new mid-range processor often bypasses the flagship of three years ago in all respects, except perhaps support for certain proprietary photo processing technologies.
The impact of ARM architecture on MIUI and HyperOS
Xiaomi’s shell, whether it’s the old MIUI or the new HyperOS, heavily relies on optimization for a specific CPU architecture. Its engineers spend huge resources ensuring that the task scheduler correctly distributes processes between the Cortex cores, which affects the smoothness of animations and the absence of micro-freezes.
Recent versions of HyperOS have introduced new memory and background management algorithms that require specific ARMv9 instructions to maximize efficiency. On older ARMv8-based devices, some AI features, such as improved background blur in video calls or voice control without the Internet, may be slower or unavailable.
Architecture also affects the speed of virtual memory (extension of RAM), the technology uses a fast drive, but the processor must have time to pump data. ARM-chips allow you to do this almost imperceptibly to the user, whereas on older models, expanding memory can even slow down the system.
Why aren’t new features coming to Xiaomi?
In addition, data security in Xiaomi depends on TrustZone, a secure area in the ARM processor. This is where fingerprints, facial data and payment information are stored. Newer versions of ARM provide improved isolation mechanisms, making modern Xiaomi less vulnerable to viruses that steal biometrics.
Next Post:What to expect from the future of Xiaomi processors
The industry is moving at leaps and bounds, and ARM architecture is no exception, and in the near future we will see a massive shift to the Cortex-X4 and A520 cores, which promise even greater productivity gains with reduced heat generation. Xiaomi, as one of the largest partners of Qualcomm and MediaTek, will have access to these new products among the first.
The focus is on integrating NPUs to work with artificial intelligence, which will not just be an add-on, but a full-fledged part of the architecture that allows you to process photos, videos and voice commands locally, without going to the cloud, and will dramatically change the speed of the assents and cameras.
It is also expected to develop chiplet technology, where different parts of the processor (core, graphics, modem) can be produced using different processes and assembled into a single system, which will allow Xiaomi to create devices that will heat less and hold a charge longer, while maintaining high power.
💡
The future of mobile processors is a hybrid architecture where AI tasks are processed in separate blocks, freeing up cores for custom applications.
Xiaomi’s own products are not to be discounted, as Surge chips are gradually evolving from simple power and photo controllers to full-fledged ISPs and even modems. In the future, we may see a Xiaomi smartphone with a fully proprietary processor, sharpened to the features of HyperOS.