Xiaomi Mi 9 SE is one of the brand’s most successful compact smartphones, released in 2019. Although the model is not new, it is still in demand due to its balanced characteristics and affordable price in the secondary market. The centerpiece of any smartphone is the processor, and in the case of the Mi 9 SE, Xiaomi has bet on the Qualcomm Snapdragon 712, a chipset that at the time of release was considered the “golden mean” between flagship and budget solutions.
But why is this processor? How does it differ from the more powerful or cheaper ones? And how relevant is it today, a few years after its release? In this article, we will take a closer look at the Snapdragon 712 architecture, compare it to its competitors, measure performance in games and everyday tasks, and answer the question: is it worth buying a Xiaomi Mi 9 SE in 2026 in terms of its heart?
Snapdragon 712: What’s Under the Hood?
Qualcomm Snapdragon 712 processor is built on 10nm process technology FinFET (improved version of 14 nm), which allowed to achieve a good balance between performance and energy efficiency. This is not the most advanced process even at the time of release (in 2019, flagships have already switched to 7 nm), but for the middle segment it was the optimal solution.
The main parameters of the chipset:
- 🔹 Central processing unit (CPU): 8 core-configuration 2+6 (2 powerful Kryo cores 360 Gold on frequency to 2.3 GHz and 6 energy-efficient Kryo 360 Silver on 1.7 GHz).
- 🎮 Graphics processor (GPU): Adreno 616 with Vulkan 1.1 and OpenGL support ES 3.2.
- 📱 Modem: Snapdragon X15 LTE (up to 800 Mbps per download, up to 150 Mbps per return).
- 🤖 Artificial Intelligence: Hexagon 685 engine DSP machine learning.
- 📷 Camera support: up to 192 MP (single module) or 16+16 MP (Dual Camera) with Support 4K HDR-video.
Importantly, the Snapdragon 712 is a slightly improved version of the Snapdragon 710 that has a higher CPU clock speed (2.3 GHz vs. 2.2 GHz) and optimized power consumption. This is not a revolutionary upgrade, but for the Xiaomi Mi 9 SE, even such small improvements were enough to stand out from the competition.
Snapdragon 712 Comparison with Competitors: Who is Stronger?
In 2019, the Snapdragon 712 competed with several popular chipsets in the mid-range.Let's compare it to the main rivals in the table:
| Characteristics | Snapdragon 712 | Snapdragon 730 | Mediatek Helio P90 | Kirin 810 |
|---|---|---|---|---|
| Technique | 10 nm | 8 nm | 12 nm | 7nm |
| Max. CPU frequency. | 2.3 GHz | 2.2 GHz | 2.2 GHz | 2.27 GHz |
| GPU | Adreno 616 | Adreno 618 | PowerVR GM 9446 | Mali-G52 MP6 |
| Support for 5G support | ❌ No. | ❌ No. | ❌ No. | ❌ No. |
| Evaluation in AnTuTu (2019) | ~180 000 | ~210 000 | ~200 000 | ~230 000 |
The table shows that the Snapdragon 712 is inferior in process technology and performance to newer chipsets such as the Kirin 810 or Snapdragon 730. However, it beats the Helio P90 in energy efficiency and stability. The main advantage of the 712th Snapdragon is the optimization for the firmware MIUI and balanced performance in medium-load games.
⚠️ WARNING: If you plan to play heavy games like Genshin Impact or Call of Duty Mobile at maximum settings, Snapdragon 712 It might seem a little weak. In those cases, it's best to look at smartphones on Snapdragon. 730/732G or Dimensity 900.
Game Performance: Will the Snapdragon 712 pull on modern designs?
One of the key questions when choosing a smartphone with a Snapdragon 712 is its ability to run modern games. Let's see what this processor is capable of in 2026:
- 🎮 Light games (Clash Royale, Brawl Stars, Among Us): run at maximum settings with the most powerful games. FPS 60+ No problem, minimum heating.
- 🎮 Midgames (PUBG Mobile, Free Fire, Mobile Legends: run on the "Balanced" or "High" settings FPS 30-40. During long sessions, heating is possible to 45-50°C.
- 🎮 Heavy games (Genshin Impact, Call of Duty Mobile, Apex Legends Mobile): run only on minimum or low settings with a high-performance mobile device. FPS 20-30. Strong heating and drawdown of personnel in open locations.
- 🎮 Emulators (PPSSPP, Dolphin: Snapdragon 712 will cope with emulation PSP Medium settings, but heavier consoles (like Nintendo Switch) will be lagging.
To improve the gaming experience on Xiaomi Mi 9 SE, it is recommended to:
Close background applications before starting the game |
Enable Performance Mode in Settings → Battery → Performance Mode|
Turn off autobrightness and set fixed brightness to 70-80%|
Use a cooling stand or play in a cool room |
Update the driver GPU through settings → The phone. → Update MIUI-->
If you are not willing to accept the restrictions, you can consider alternative options:
Which smartphones are better for gaming in 2026?
Energy Efficiency and Heat: The Weakness of the Snapdragon 712?
Despite its advantages, the Snapdragon 712 is not without its drawbacks, the main one being the heat at long loads, because of the 10-nm process technology, the chipset is prone to trottling (automatically reducing the frequency when overheated), which is especially noticeable in games or when recording video in 4K.
Heat test results (after 30 minutes of playing PUBG Mobile at high settings):
- 🌡️ Temperature. CPU: 50-55°C (peak values to 60°C).
- 🔋 Battery consumption: ~12-15% hourly.
- ⚡ Trottling: frequency CPU fall off 2.3 GHz 1.7-1.9 GHz.
By comparison, more modern chipsets on 7-8 nm process technology (for example, Snapdragon 732G or Dimensity 900) heat less and keep peak performance longer. However, in everyday tasks (social networks, messengers, video viewing), the Snapdragon 712 behaves stably and does not overheat.
💡
If your Xiaomi Mi 9 SE is getting hot, try rolling back the firmware to an earlier version of MIUI - sometimes updates worsen optimization for older chipsets.
The relevance of the Snapdragon 712 in 2026: is it worth buying the Xiaomi Mi 9 SE?
5 years after the release of the Xiaomi Mi 9 SE and its Snapdragon 712 processor do not look revolutionary. However, this does not mean that the smartphone is completely outdated.
Pros:
- ✅ Price: on the secondary market Mi 9 SE You can find it for 8,000 to 12,000. ₽ — It is very affordable for a smartphone with AMOLED-screen-and-triple-camera.
- ✅ Compact: 5.97′′ diagonal and 155g weight make it one of the most comfortable flagships for one hand.
- ✅ Support: Despite the outdated iron, MIUI Continues to receive security updates (albeit not regularly).
Cons:
- ❌ Performance: for modern games and heavy applications, the power of the Snapdragon 712 is no longer enough.
- ❌ Absence 5G: The chipset does not support fifth-generation networks, which may be critical in the coming years.
- ❌ Battery: capacity of 3070 mAh in 2026 seems modest, and battery wear for 5 years could reduce autonomy.
The Xiaomi Mi 9 SE is suitable for those who are looking for a low-cost and compact smartphone for everyday tasks, but do not plan to play modern games or use resource-intensive applications. For gaming or multitasking, it is better to consider newer models on the Snapdragon 778G or Dimensity 1200.
💡
The Snapdragon 712 in 2026 is suitable for basic tasks, but not for heavy gaming or professional work, the main advantages are the low price and compactness of the Mi 9 SE.
How to check the status of the processor in Xiaomi Mi 9 SE?
If you already own Xiaomi Mi 9 SE or are planning to buy a used model, it’s helpful to learn how to check the status of the processor.
Diagnostic methods:
- Trottling check: Install the Throttling Test CPU app from Google Play. Run the test for 15-20 minutes. If the CPU frequency drops below 1.5 GHz when loaded, the chipset is worn out or requires a replacement thermopast.
- Temperature monitoring: Use AIDA64 or DevCheck to track temperature. Normal values: up to 45°C in plain, up to 60°C under load. If the temperature is above 70°C, this is a sign of cooling problems.
Performance test:
- Run AnTuTu Benchmark or Geekbench 5.
- Compare the results with the benchmarks for the Snapdragon 712 (~180,000 in AnTuTu).
- If the scores are lower by 20% or more, the processor is degraded.
⚠️ Warning: If a smartphone suddenly turns off or restarts during testing, this may indicate a power problem with the chipset. In such cases, a diagnosis at a service center is required - the motherboard or capacitors may be faulty.