As the sovereign SoC of Android flagship in 2021, Snapdragon 888 finally appeared on Xiaomi 11 released on December 28. And we Love to play computer games We also did the test at the first time. Now let's take a look at the performance of Snapdragon 888 in terms of performance and power consumption.
Parameter specification
Qualcomm Snapdragon 888 uses Samsung's 5nm LPE process, and last year's Snapdragon 865 uses TSMC's 7nm N7P process:
The CPU part is Kryo 680 architecture, 1 * 2.84GHz class X1 (1MB L2 cache)+3 * 2.24GHz class A78 (512KB L2 cache)+4 * 1.8GHz class A55;
GPU is Adreno 660 with frequency of 840MHz;
Up to 4 * 16bit 3200MHz LPDDR5 memory is supported (unfortunately, the frequency of mobile phone memory is higher than that of many PCs these days)
AI performance is improved from 15TOPS to 26TOPS, and finally 5G baseband X60 is integrated. FastConnect 6900, the supporting chip of Snapdragon 888, also brings WiFi 6 enhanced version. The latter supports 4096QAM and 160MHz, which is a true "future ready" configuration.
The AI part of mobile phones is now mainly used to improve camera performance (in addition to voice recognition, conversion, handwriting recognition, etc.). To some extent, Apple, Huawei and Qualcomm have paid so much attention to AI performance in recent years, which is largely due to the camera arms race of mobile phones.
Objective run test
Use Snapdragon 865 (Xiaomi 10 Ultra), Kirin 9000 (Huawei Mate40 Pro), Tianji 1000+(OPPO Reno5 Pro), A13 (iPhone 11 Pro Max), A14 (iPhone 12 Pro Max) as competitors.
CPU Performance Testing
GPU graphics performance test
Memory test (because the stability of this test is general, the results are only for reference)
Xiaomi 11's full blood 3200MHz LPDDR5, memory latency and ternary combination multi-core test performance are very eye-catching.
Flash memory read/write performance test
Since Qualcomm began to use the "1+3+4" structure in the CPU part, the dominant frequencies of three successive generations of products have remained the same, 2.84GHz+2.42GHz+1.8GHz. If it is a coincidence, no one will believe it. The frequency of large and small cores is too conservative, resulting in the significantly stronger single core performance of the Snapdragon 888. The multi-core performance can only be compared with that of the Kirin 9000, and it does not open a big gap with the previous generation.
With X1 super core architecture, GeekBench single thread of Android camp finally broke through 1100 points, successfully catching up with A12 (iPhone XS/XR generation) two years ago. However, Apple has not been lazy in the past two years. Faced with Apple A14 with a single core of 1600 points, all beings are equal, and everyone is a brother. Better than 888, there is also a 40% gap;
In the case of multithreading, it was slightly upgraded to 3737 points. Together, one X1 increased 237 points, and the remaining seven cores shared 143 points (of course, single core and multi-core scores cannot be directly compared). There are three A78 on the same frequency. It seems that there is not much improvement compared with A77.
In contrast, the Samsung Exynos 2100 is almost 3900 points. Exynos has always had a higher frequency of large and small cores than Qualcomm. At the same time, the architecture and the bottleneck of large cores are extremely high, and multi-core performance will be better, but it is estimated that it is also "super smokey".
The ARM official also gave you a clear idea before. The main task of A78 should be to "improve the energy efficiency ratio and save the chip area", and the single core performance output should be given to the X1 architecture. The chip area of the latter is 2.3 times that of A78, claiming that the peak performance is 1.3 times that of A77, and the biggest improvement is machine learning performance (2 times).
The area of three A78 chips saved is not enough for X1. The Snapdragon 888 is a "10 billion transistor". From the perspective of publicity, it should not be more than the 15.3 billion of Kirin 9000. The A14, even without baseband integration, has 11.8 billion transistors.
From the chip area and actual performance, the 2.84GHz X1 is not cost-effective. After all, the ultrahigh frequency A77 of Kirin 9000 also exceeded 1000 points. For the Snapdragon 888+in the second half of 2021, the frequency of X1 and the remaining toothpaste will depend on the improvement of Samsung's 5nm LPE process and the later optimization of mobile phone manufacturers.
For the GPU part, it is claimed to be the largest improvement in history, with 35% performance improvement and 20% energy efficiency ratio improvement (peak power consumption will increase by 12.5% if not calculated at the same time). The frequency of Adreno 660 is up to 840MHz, compared with Adreno 650 of Snapdragon 865 (587MHz, Snapdragon 865+is 670MHz), the frequency is increased by 43%. According to the official data, the GPU energy efficiency of Snapdragon 888 is lower than that of Snapdragon 865 at such a high frequency.
According to the actual GFXBench test, Snapdragon 888 has increased by 29% - 43%, while 3D Mark has also increased by 27% - 53%, in line with the official announcement. However, the Mali GPU of the same generation of ARM public version has made greater progress. For the first time, Kirin 9000 piled the public version GPU to the limit, with Mali-G78 MC24@759MHz , and achieved similar performance.
Is the dragon 888 "five to five" with the Kirin 9000? It lost in the most stressful Wild Life and GFX Aztec Ruins scenes (in the 3D Mark, which has always been known as Qualcomm Mark, Snapdragon 888 even lost miserably in the Wild Life scenes), but most of the low pressure scenes won.
Regrettably, it was announced that the Android platform could not threaten the self-developed GPU of Apple A14 in terms of absolute performance, regardless of power consumption and heat dissipation.
Power consumption and heating
Xiaolong 888 no-load and single baking GPU test
Power consumption of X1 large core in different single bake tests
The 840MHz ultrahigh frequency Adreno 660 of Snapdragon 888, after deducting about 1.1W of no-load power (it seems that our Snapdragon 888 is not very healthy), the power of a single baking GPU can reach 9W, 7W at 738MHz, and 6.1W at 676MHz. And the super core X1 of ARM is not a fuel saving lamp. Even if it is only 2.84GHz, the single core power consumption under different tests is between 2.1W and 3.1W.
Finally, the GPU GFLOPS power consumption test is subject to many variables, and different Snapdragon 888s and system versions have different physique/scheduling, which should be referred to.
The room temperature is 25.8 ℃, and the entertainment rabbit runs minutes in a circle for 10 minutes. The highest temperature on the front is 49.6 degrees, and the highest temperature on the back is 49.5 degrees
The room temperature is 25 ℃, and the battlefield is stimulated at 60fps for 20 minutes. The maximum temperature on the front side is 48.8 degrees, and the maximum temperature on the back side is 48.1 degrees
Samsung 5nm LPE+high-frequency Adreno 660 is really enthusiastic. The heat dissipation performance of Xiaomi 11 is good, and the regulation is very active. At 26 ℃, the GPU toaster can also maintain 7.5W power consumption for 10 minutes, and the GPU terminal can also maintain 608 to 676MHz.
Xiaomi 11, Snapdragon 888, and Stimulating the Battlefield are limited to 60 fps. All the picture quality options are exploded. The test lasted 20 minutes without pressure. The average frame rate is 59.9 frames, but the temperature of both sides has exceeded 48 degrees.
The original god is 60fps, and all settings are broken. The Snapdragon 888 has to kneel down on the spot. The average frame rate of the 10 minute game seems to be 51.5 frames, but the fluctuation in the middle is very large. In fact, the original god is mainly a game that eats CPU, but X1 is also enthusiastic. After 6 minutes, overheating and frequency reduction will affect the performance.
Summary
Xiaomi 11 starts with Xiaolong 888, which has unlimited scenery, but also bears the technical pressure and risk of early training. The switch from Qualcomm Snapdragon 888 to Samsung's 5nm LPE process, the new X1 super core, and high-frequency GPU are all possible reasons for the enthusiasm of Snapdragon 888. The absolute performance of the GPU has been improved by 35%. While the performance has reached the "PC level", the power consumption has also reached the "PC level" (Core M series calls the insiders directly).
Of course, the situation is far less exaggerated than that of Snapdragon 810, but considering that the increase is not as big as expected, and the Kirin 9000 may be the Apple A14, which can't even see the taillights, Android users, such as I, will inevitably be distressed, and then curse "the environmental cooling configuration of the iPhone, which reduces the frequency to dogs, and can't play games at all" to comfort ourselves.
Reflected in actual use, even if the 2K 120Hz is fully open, the MIUI 12.0.9 version of the Xiaomi 11 system is extremely smooth. The performance scheduling of the system is OK, and even very positive. The temperature balance line close to 50 degrees already belongs to the game phone type of "kill before kill". It is said that the poor power control of Snapdragon 888 is a bug in MIUI. After all, it is only an engineering machine, and it is not MIUI 12.5. I hope the rumor is true.
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