Qualcomm Snapdragon 855 has been released for some time, and it only exists on PPT. However, it is an indisputable fact that Qualcomm Snapdragon 845 has become history. With the launch of Snapdragon 855 mobile phones, we can see the gap between the two. How old is it? Let’s take a look at the data.
First, the process technology is different: 845 uses the second generation 10 nanometer process, 855 uses the 7nm TSMC process, which is the general process of all current flagship processors.
Second, the architecture (CPU) is different, the 845 is the third-generation eight-core Kryo385C architecture ( consisting of four 2.8GHz A75 cores + four 1.8GHz A53 cores), while the 855 is the fourth-generation Kyro485 architecture, 1 +3+4 eight-core architecture (frequency: 2.84GHz+3*2.42GHz+4*1.8GHZ).
Due to the improvement of architecture and technology, the CPU of Qualcomm Snapdragon 855 has improved significantly, which is 45% higher than that of 845.
Third, the GPU is different, the 845G PU is the Adreno 630, and the 855 is the Adreno 640 GPU. Since Qualcomm’s GPU has always been a long-term, there is no such thing as a spurt of nearly 50% on the GPU, but a regular upgrade of 20%.
Other aspects: Qualcomm 855 integrates Hexagon 690 DSP digital signal processor, Spectra 380 ISP image signal processor, Snapdragon X24 2Gbps high-speed baseband and other modules, added a tensor accelerator for AI and supports the fourth generation AI engine. Can achieve more than 7 trillion operations per second (7TOPs), compared to the Opteron 845, AI performance increased by 3 times.
In addition, Qualcomm 855 also supports 3D acoustic wave sensor, which is the world’s first commercial solution to support the under-screen ultrasonic fingerprint. Since Qualcomm is also a major member of the 5g standard, Qualcomm 855 can also be connected to the 5G baseband.
At present, there are very few Qualcomm 855 mobile phones released, basically still internal testing, and there is no public sales. However, through the situation of the major benchmark software, the 855 benchmark scores are very amazing. But think about the 845 running points can be optimized to 30w (Antutu), so don’t be too obsessed with benchmark points.
In general, due to various aspects of process technology, architecture upgrades, 5G communications, etc., the 855 is significantly improved on the basis of 845 (compared to the comparison of 845 and 835), the gap is still quite large.
Is there a big gap between Snapdragon 845 and Snapdragon 855?
The gap is not big, first look at running points, although antutu points cannot explain what the problem, but for Android phones, the higher the performance, the stronger the score, this will not change.
CPU can be seen to go through the Snapdragon 845 processor running into 90,000+ benchmark points, while Snapdragon 855 points is divided into 110,000 + close to 120,000, there is an improvement. In addition, the structure of the “Four Cores and 4 Small Cores” was changed last year. The Snapdragon 855 switched to the 1+3+4 three-cluster architecture. “1” is a large core based on Cortex-A76, clocked at 2.84GHz; “3” is three medium cores with a frequency of 2.41 GHz; “4” is four small cores with a frequency of 1.78 GHz.
The Snapdragon 855 adopts the 7-nanometer process technology, and the Kryo 485 CPU, the official data performance is improved by 45%, and the power consumption and heat are relatively high compared to the Qualcomm Snapdragon 845 processor.
GPU : Qualcomm Snapdragon 845 processor runs into 120,000+, while Qualcomm Snapdragon 855 processor runs into 140,000+. The Snapdragon 855 upgraded the GPU to the Adreno 640, a 20% improvement over the Adreno 630.
Regarding the 5G aspect: The Snapdragon 855 integrates an X24 LTE modem and supports a downstream rate of up to 2 Gbps. But the 5G modem X50 is not integrated on the SoC, which means that handset manufacturers need an external X50 to enable 5G support.
Regarding the AI aspect: the Snapdragon 855 still does not use a separate NPU engine but emphasizes system-level AI acceleration. The tensor processing unit is added to the Hexagon 690 DSP. Qualcomm said that the AI performance of the Snapdragon 855 is three times that of the 845.
Regarding the improvement of other aspects, it depends on the optimization and parameter configuration of each manufacturer.
Conclusion
Because the Snapdragon 855 mobile platform needs to be plugged into the X50 baseband to achieve 5G, it is more difficult for manufacturers to design the antenna RF than the past. How to measure heat, power consumption, and body size is a difficult problem for mobile phone manufacturers. Even if Qualcomm can provide a relatively complete reference design, capital investment is a huge test for manufacturers.
If you look at the performance, the improvement is not very big, at least the performance of the Qualcomm Snapdragon 845 processor is still not weak, absolutely enough, and about the 5G news, the last two days, many rumors say 5G The price of mobile phones will reach 8000 yuan (about $1160), in fact, this should be considered a problem of 5G patents! The real popularity of 5G will have to wait until 2020, at which time the price of each mobile phone will return to the normal price.
In addition, Lenovo’s conference, has released the Qualcomm Snapdragon 855 processor, the price is relatively cost-effective, but there is no mention about the 5G thing, although the Qualcomm Snapdragon 855 processor is very strong, but from In terms of price, the price difference with Qualcomm Snapdragon 845 processor is not very large, so there is not much difference in the usual use, but the power consumption and heat will be better controlled, and the other is that there is a big problem in AI. Improvement.
Not too big, the main gap is on ai. Of course, Snapdragon 855 is cooler, and 10nm can’t hold a 75. There are 855 support 5G, 855 will be popular in the next 5.6 months, and 5G should be commercialized. The US has just announced that 5 cities are commercially available for 5G. 5G out, 4G signal is bound to be suppressed.
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