It is said that Snapdragon 888 rolled over, which consumes a lot of electricity and has a bad fever. Is that really the case?

I heard that Snapdragon 888 overturned on a large scale. ...

On a search engine, if you enter "Snapdragon 888", there will even be entries such as "Snapdragon 888 overturned". Browsing this information, I found that there are two main types of rollover, one is power consumption and battery life, and the other is serious fever. In addition, there are posts analyzing the causes of rollover. It is said that the Samsung OEM that Snapdragon 888 was looking for this time was not TSMC, so it was overthrown; It is also said that the reason for the rollover is that Snapdragon 888 has a super-large nucleus Cortex-X 1, which is 2.3 times that of Cortex-A78, but the manufacturing process is only 5nm. The existing level can't drag this core, and the performance will heat up when it is fully open. ...

After reading all kinds of tests and analysis, I found that they have one thing in common. Most of the evaluations are based on Xiaomi 1 1, and the discussion of netizens is also based on the test results of Xiaomi 1 1. So, is it Xiaomi 1 1 or Snapdragon 888? Xiaomi is not the only mobile phone using Snapdragon 888, so today we will use another mobile phone using Snapdragon 888, vivo X60 Pro+, for testing.

For reference, two mobile phones have been added to this evaluation. One is Redmi K30S speed commemorative edition, which uses Snapdragon's last generation flagship chip Snapdragon 865, and the other is iPhone 12 Pro Max, and its processor A 14 also uses 5nm process technology. When three mobile phones are tested in the same environment, we can know whether Snapdragon 888 capsized.

fatigue-testing

The battery life test is conducted by video recording. After all, the ISP in the chip consumes a lot of power when recording video. In addition, this test also mobilized two main power consumption items: screen and camera module, so it is targeted.

In order to simulate the real computer environment, the SIM card was inserted into the mobile phone during the test, and the 5G network remained connected. In order to control the variables, the screen brightness is adjusted to the highest level during video recording, and the video output specification is 4K +60 frames.

Through the actual measurement, we found that the 4200mAh vivo X60 Pro+ was dead first and only lasted for 167 minutes. The 3687mAh iPhone 12 Pro Max died for the second time, and it took 180 minutes. The 5000mAh Redmi K30S speed commemorative edition has the longest duration, which takes 247 minutes.

Through the power consumption curve, it can be found that there is no cliff-like power failure in all three mobile phones. On the contrary, the lower the power consumption of iPhone 12 Pro Max, the more it is used, especially the last 12% power consumption takes 30 minutes, which is longer than any previous time period. However, this is only an illusion, because the voltage when the mobile phone is discharged is not constant, and iOS has the setting of a low-power down-frequency lock core (I believe iPhone users have this feeling, playing games at low power is very stuck, just because it is locked), so this is a distraction.

Considering that the discharge voltage of the mobile phone is not constant, all the tests we do are a complete power consumption cycle. Through the unit power consumption formula "unit power consumption = (battery capacity/battery life) 3.7V", we can get:

The unit power consumption of iPhone 12 Pro is Max = (3687 mAh/180 min) 3.7V = 75.79 MW.

Unit power consumption of Redmi K30S Extreme Commemorative Edition = = (5000mah/247min) 3.7V = 74.90mw

The unit power consumption of vivo X60 Pro is+= (4200mah/167min) 3.7V = 93.05mw..

Through calculation, we found that the unit power consumption of iPhone 12 Pro Max and Redmi K30S speed commemorative edition is similar, while the power consumption of vivo X60 Pro+ with Snapdragon 888 is nearly 20% higher than that of the other two mobile phones. During the test, we used a tripod to fix the mirror position, so the micro-pan/tilt of vivo X60 Pro+ is not acceptable, and the test model is fair. No wonder the power consumption of vivo X60 Pro+ is higher.

heat run

Video temperature test

Friends who have had photography experience should know that the camera module will heat up after a long-term video recording of the mobile phone, so in the process of testing the battery life in the previous link, we sampled the temperature of the camera module.

We sampled five times, and the highest temperatures of the three mobile phones all appeared in the same batch. At this time, the ambient temperature is between 12 and 13.

Vivo X60 Pro+ has the highest temperature, with an extreme temperature of 32.8, followed by iPhone 12 Pro Max, with an extreme temperature of 30.8, and Redmi K30S Extreme Edition has the lowest temperature, with an extreme temperature of only 25.0.

However, due to the system setup, the test data of Redmi K30S speed commemorative edition can only be used as a reference, which is of little significance. In 4K 60 frame mode, the longest continuous recording time of this phone is only 8 minutes, and it needs to be manually re-operated after 8 minutes. In other words, in the video recording test, the camera module does not work continuously, and there is a gap in the middle, while the other two mobile phones can record continuously as long as the memory is not full, which is continuous and the temperature will definitely be higher.

Operating temperature test

Under what circumstances is the temperature of mobile phone higher? When the performance is fully open, such as running scores, because running scores is a face test, no mobile phone manufacturer is willing to run low scores on their own products. In other words, as long as the performance is tested by running scores, the mobile phone will not be downgraded and will be completely fired. This round of testing is to let three mobile phones run for three consecutive games with Ann Bunny evaluation under the premise of sufficient power, which takes about 30 minutes. After the operation, we used temperature measuring gun to test the temperature of the front and back of the fuselage.

Running is carried out indoors, and the room temperature fluctuates between 13- 15. Vivo X60 Pro+ has the highest temperature, with the highest temperature on the back fluctuating around 34 and the highest temperature on the front fluctuating around 35. The temperature of iPhone 12 Pro Max is the second, the highest temperature on the back fluctuates around 32, and the highest temperature on the front fluctuates around 3 1. Redmi K30S speed commemorative edition has the lowest temperature, with the highest temperature on the back fluctuating around 27 and the highest temperature on the front fluctuating around 30.

As far as the specific temperature value is concerned, it is not high.

Game temperature test

In daily life, the most sensitive use of temperature by users is games, so the last round of testing is to test the fuselage temperature during the game. The tested game chose the FPS game "Peace Elite" which eats more resources.

The higher the image quality during the game, the more graphics resources are consumed. Therefore, we set the image quality of the game to "Ultra HD" (PS: Photonics Lab claims that the image quality has 4K architectural drawings, and I believe everyone can understand the degree of resource consumption by image quality when they see the word "4K"), and choose the highest frame mode that the image quality can support "Ultra HD". Each mobile phone plays two games, and the total duration of the games is about 40 minutes. After the game, test the temperature. Here are the specific test results.

In this round of tests, vivo X60 Pro+ has the lowest temperature, with the highest temperature on the front less than 35 and the highest temperature on the back less than 33, while the body temperatures of the other two mobile phones are much higher. Among them, the highest temperature on the back of iPhone 12 Pro Max is over 40, and the highest temperature on the front hovers around 38; The highest temperature on the front of Redmi K30S speed commemorative edition is over 40, and the highest temperature on the back hovers around 38.

As far as the game experience is concerned, vivo X60 Pro+ is relatively smooth in somatosensory sense, so the low temperature is not caused by the down-frequency frame locking factor. Physically speaking, vivo X60 Pro+ can't feel the phone burning after playing for a long time. In addition to its low temperature, there are also factors of body material. The other two phones are made of glass, and vivo X60 Pro+ is made of plain leather. The same temperature value, the touch of plain skin and the touch of glass are two concepts, and plain skin has certain somatosensory advantages.

Redmi K30S speed commemorative edition and iPhone 12 Pro Max are also not stuck, but at some point, the fuselage will feel hot.

abstract

Through the test, we get the following conclusions:

Snapdragon 888 does consume more power. On the premise of similar battery capacity, the battery life of the mobile phone using Snapdragon 888 is not as good as that using Snapdragon 865.

On the premise of sufficient performance, the body temperature of vivo X60 Pro+ equipped with Snapdragon 888 is indeed higher than that of the other two mobile phones, but the specific temperature value is not too hot.

Playing "Peace Elite", the highest picture quality, the highest frame rate mode under the highest picture quality, the body temperature of vivo X60 Pro+ is not as high as the other two mobile phones, which can only explain two points: ① This picture quality setting is a free resource for Snapdragon 888; ② The temperature control of vivo X60 Pro+is more prominent.

It is said on the Internet that Snapdragon 888 fever is mostly an extreme test under extreme conditions. It is not easy to encounter such usage in daily life, and it does not mean that all mobile phones using Snapdragon 888 will encounter such a situation. For example, my vivo X60 Pro+ is an exception.