There are four key points to upgrade Xiaomi 6: Snapdragon 835, standard 6G memory, dual camera and four-way curved back cover. This upgrade looks fairly routine, but The launch time of Xiaomi 6 was chosen very nicely. As the first model of Snapdragon 835 in China, it was sold nearly a month earlier than the national bank version of S8/S8+. Considering the importance of Snapdragon 835, the flagship core in 2017, this paper focuses on the performance and power consumption of Xiaomi 6 in addition to the new dual camera.
Appearance and accessories
Love to play computer games We got the Xiaomi 6 ceramic exclusive edition, which was packaged as the exclusive "Flash Grey+Gold" color matching, while the ordinary edition was white. Its configuration is the same as the high configuration version, but the back cover is made of ceramic 。
The richness and color matching of accessories have changed the style of Xiaomi before, including data cable, charging head, type-C to 3.5mm adapter, and silicone sleeve. The charging head and the data cable turn white. Similar to the iPhone package, the data cable and the adapter are fixed with a paper holder. The official silicone protective sleeve attached this time is very interesting. It is also thin where it fits the antenna opening, which may be to reduce the signal attenuation when wearing the sleeve.
Xiaomi 6 has cancelled the practical and simple 3.5mm headphone interface, which is opposed to the idea of playing computer games. Although there is an official transfer line, in a few years, the embarrassing situation of "trying to use earphones but finding no adapter" and "even if you have a transfer line, you can't listen to music when charged" will happen frequently. However, by the time mainstream mobile phones eliminate headphone holes and Type-C or Bluetooth headsets become popular, Xiaomi 6 may have been delisted for a long time.
For new technologies and reforms, from the perspective of individual users, the author is more in favor of Samsung's attitude towards Type-C interface - wait until it is popularized by peers. Although "let peers suffer from compatibility and enjoy their own success" sounds like a chicken thief, it is indeed the most beneficial practice for their users.
The maximum output of the charging head is 9V/2A or 12V/1.5A, with the previous generation QC3.0 charger（ MDY-08-EH ）The parameters are the same, but the shape and color of the charging head of Xiaomi 6 have changed.
Xiaomi 6 is equipped with a 5.15-inch 1080P IPS screen, 428PPI, and the screen looks good. Non perforated fingerprint identification sensor, specific model is FPC 102x, unlocking The speed is close to 1+3/3T, Compared with the "black technology" ultrasonic recognition half a year ago, it is much faster, and the author is much happier.
Connection between ceramic back shell and frame of four curved surfaces Smooth harmonious. However, both the ordinary version and the ceramic exclusive plate of the Xiaomi 6 are obviously biased, reaching 168g and 182g respectively, which is the common weight of 5.5 and 5.7 inch screen phones. Xiaomi 6 is equipped with dual 12 megapixel cameras. The main camera with optical anti shake is near the outside, and the telephoto camera is on the inside, The exclusive version also has 18K gold plated lens decoration ring.
（ On the top of the fuselage, the friendly infrared transmitter returns ）
Classic body layout: left card slot, right volume and power button, top infrared and noise reducing microphone, bottom speaker/microphone and Type-C connector.
Xiaomi 5, Xiaomi 5s, Xiaomi 6
The design languages of Xiaomi 5/5s and Xiaomi 6 are highly consistent, but each generation has different material selection or surface treatment.
(Xiaomi 6 With predecessors: Xiaomi 3, Xiaomi 4, Xiaomi 5 and Xiaomi 5s ）
Workmanship&feel&fingerprint identification
（ Xiaomi 6 exclusive version of ceramic back cover and Xiaomi MIX of ceramic body ）
feel: The Xiaomi 6 premium version is well made, but the gap control of the back cover, screen and frame of the ordinary version we got is not so good, so we can't confirm whether it is a common phenomenon or an individual case. There is no plastic washer like Xiaomi 5s between the screen and the frame of Xiaomi 6. The radian of the back cover and the frame is well connected. Although the front 2.5D glass arc is very small, the grip feel is significantly improved.
maintain: Although Xiaomi 6 is the most beautiful and the best felt orthodox flagship in the history of Xiaomi, its high weight, glass material, screen higher than the frame, and four-way curved back cover make it the Xiaomi mobile phone with the highest risk of falling and damage in history, and it is recommended to wear a cover at ordinary times.
Exclusive ceramic version: The ceramic version is only 100 yuan more expensive than the high configuration version this time, which is very cost-effective. However, attention should be paid to the maintenance issues: the ordinary version of Xiaomi logo and production information are under the glass back cover, while the exclusive version is printed on ceramics, which is easy to scratch. The most unexpected thing is that the back cover of the ceramic version is also easy to scratch. At the transition of the 4-curved glass, even if it is placed on the desktop for daily use, it is also easy to be scratched by dust. In addition, the ceramic plate also weighs a lot, and the probability of falling damage will be greater. If you can accept these small shortcomings, the ceramic version with better quality and better quality is still worth buying.
screen
Xiaomi 6 maintains a 5.15-inch screen size, with a nominal maximum brightness of 600 nits and a minimum brightness of 1 nit, which can cover 94.4% of the NTSC color gamut. The actual objective test:
Xiaomi 6 provides three modes of "intelligent environment adaptation, screen enhancement and standard mode", with the maximum brightness of 580, 604 and 560 nits respectively.
The maximum brightness difference of the screen of our test machine is about 25 nits. The factory default color temperature of intelligent environment adaptation mode is 7357K, which is slightly cold. The standard mode is 6327K, which is obviously warm. In addition, our tester has a magenta bias in the standard mode.
In the standard mode, the color accuracy test is carried out at a brightness close to 100 nits in daily use. Under the sRGB color gamut, the average deltaE of the 104 colors of the machine is 3.6, and the maximum is 8.2. The main color deviation is in the blue purple area, and the color accuracy is somewhat better than the deltaE 4.1 of Xiaomi 5. For comparison, iPhone 7 is 1.6, Note5 is 1.8, S6 edge+is 2.6, and S7 edge is 2.9 (the smaller the better).
The objective parameters of the screen have not changed much, the absolute brightness has declined, and the color accuracy has slightly improved. In terms of actual appearance, Xiaomi 6 performs well on the whole. Although it has little impact on daily use, the defects of the previous generation of screens also remain: there are still twills on the side of the light background, and the bottom of the screen is still dark and yellow.
system
Xiaomi 6 is equipped with MIUI 8.2 based on Android 7.1.1, which is still a familiar MIUI with rich and comprehensive functions, but there are advertisements in many places, even on the launch page of its own browser. The system fluency, application installation speed and response speed are all top level now.
The specific features and functions will not be described here. Considering the position of MIUI in domestic ROMs, the question is mainly raised here. Whether it's for beginners or other special considerations, The author is not satisfied with the current system, especially Multi task interface:
The Android 7.1 native "Double click multi task button to switch to the previous application" function has been blocked, and there is no advanced application windowing function of the native system;
Click the multi task button in the current app, and the multi task card will stop on the previous app strangely;
The card of the current app cannot be crossed out. You must return to the desktop to kill the current app in the multitasking interface (But Xiaomi 5s development version can be crossed out) ；
Entering a multi task interface in a horizontal screen app such as a game will forcibly lock the horizontal screen, and you will have to tilt your head when replying to WeChat between games;
These are all very painful designs. In addition, the dual camera interface and functions are highly copied from the iPhone 7 Plus. To access the computer, it is still necessary to manually select the mode to transmit data. To upgrade the system kernel, but no new functions are introduced. These design and conceptual setbacks make us more nostalgic for the MIUI a few years ago.
performance
Configuration and performance analysis: Xiaomi 6 is the first mass production model equipped with Snapdragon 835 in China, which is the biggest highlight of Xiaomi 6. The CPU part of Snapdragon 835 is changed from the original fully autonomous architecture Kryo to the semi autonomous design Kryo 280, It is very likely that the modified version of 4-core A73+4-core A53 is used. Apart from the name, it has no inheritance relationship with the original Kryo architecture.
The performance of the Snapdragon 835 CPU is very close to that of the A73 on the Kirin 960. The performance of the integer operation IPC has significantly improved compared with 820/821, but the floating point performance has decreased compared with the previous generation (integer operation affects the daily application speed, and more floating point operations affect the graphics performance).
In terms of GPU, the Adreno530 architecture on Adreno 540 and Snapdragon 820 is not very different. Small optimizations have been made to avoid previous bottlenecks, and ALU and registers have been optimized. By improving the depth rejection filter, the computing load of each pixel is reduced to improve performance and reduce energy consumption. Plus the 10nm process, it can run at a higher frequency (from 624MHz to 710MHz). Qualcomm claims that its 3D rendering is 25% higher than that of the 820 Adreno 530.
Comparison object: We use Xiaomi 5s with Snapdragon 821 and One Plus 3T (the most active 821), Glory V9 with Kirin960, Galaxy S8+(G955N) with Exynos 8895, and Galaxy S8+with Snapdragon 835 to compare with Xiaomi 6. The specific data can be used to stamp the machine Running points library , below are some excerpts:
CPU operation performance test
GPU graphics performance test
In front of the generation SoC of Snapdragon 835, Exynos 8895 and Kirin960, the Xiaomi 5s equipped with Snapdragon 821 but tuned more for endurance optimization is like a product of the last century, with CPU and GPU performance lagging far behind in the whole process. The CPU part and the S8+of the Exynos 8895 have each other's wins and losses. Xiaosheng uses the glory V9 of Kirin 960.
In the GPU part, Xiaomi6 played an excellent role. The Adreno 540 with full frequency of 710MHz has improved to a certain extent compared with the Bank of China S8+(the GPU frequency is 670MHz), reached the level of the Qualcomm test machine, and led the competitors in the latest test. In the Android platform's performance bottleneck period of "one frame rolling, two seconds killing, three frames crashing into slag", such GPU performance improvement is really touching. In addition, the resolution of Xiaomi 6 is only 1080P. There is no doubt that Xiaomi 6 is the strongest game flagship on Android platform.
Record of flash memory chip model of Aigo tester (different batches of some models may use different flash memory)
In addition to the 64G storage of the Bank of China S8+, the five machines here are all 128G versions. In other cases, the larger the flash memory capacity, the faster the speed. The premium version of Xiaomi 6 on our hands uses a 128G Toshiba UFS 2.1 chip (model THGAF4T0N8LBAIRB), which is the HS-G3 2-Lane standard, with an ultimate theoretical speed of 1.45GB/s. Xiaomi MIUI still uses the EXT4 file system (random read and write performance is much weaker than that of models using the F2FS file system).
Storage performance test
In terms of flash memory performance, Xiaomi 6, a 128G Toshiba UFS 2.1 flash memory, is weaker than Samsung's competitor in terms of ultimate continuous read and write performance, losing to V9 and the Emperor S8+(G955N), and even cannot win the 64G National Bank S8+in terms of continuous read, but its performance is still much better than the single channel UFS 2.0 adopted by the previous generation.
In terms of random reading and writing, the glory V9 and one plus 3T using the F2FS file system easily crushed other competitors. Among the models using the EXT4 file system, the Xiaomi 6 performs well, second only to the Emperor S8+(G955N). More comparisons and file system science popularization can be stamped How to View the Type of Flash Memory? UFS and F2FS Simple Science Popularization 。
Frequency and core scheduling
Xiaomi 6 frequency monitoring
GFXBench test, GPU frequency monitoring diagram amplification
For the CPU part, the Snapdragon 835 is a 1.9GHz small core+2.45GHz large core with very high frequency. In fact, the daily use of Xiaomi6 is maintained at 2.36GHz at most, and it will be pushed to 2.45GHz only within 1 or 2 seconds of calling the camera. Scanning QR code or AIDA 64 and other third-party apps to extract camera data in the background will also trigger the highest frequency in a short time.
In terms of GPU frequency, the Xiaomi 6 can reach 710MHz designed by Qualcomm in daily use. In a short time, it can even reach nearly 800MHz, which is more conscientious than the 670MHz GPU on S8/S8+. For related content, you can view the articles before Love Computer "Surprisingly full frequency! Xiaomi 6" falsely reported "GPU frequency" and Full blood? Residual blood? What is the highest frequency of Qualcomm Snapdragon 835 。
Stability: In daily use, the CPU part of Xiaomi 6 can easily reach the "Daily Highest Frequency" of 1.9GHz+2.36GHz, while the GPU frequency is far lower than the original nominal 653MHz of Xiaomi (after the test data of Aigo was released, it was changed back to 710MHz). In games such as Crash 3 and Rapids 3, the GPU frequency is also mainly around 300-400MHz. The main reason may be that there is too much GPU performance surplus, which leads to the failure of the frequency. GPUFLOPS itself is a very unpopular testing tool, which can basically eliminate the possibility of special optimization of run points.
At room temperature of 28 ℃, without sleeve, With the 8-core full open copier, the Xiaomi 6 (SoC performance of different physiques will be different) on our hands 30 seconds later, the big core dropped to 2.26GHz; After 50 seconds, one big core goes offline, and the others fluctuate mainly at 2.26-2.36GHz in three; Six minutes later, two large cores are offline, but the frequency of other cores has not changed. There will be a small frequency reduction of about 1 second every 6 or 7 seconds, and this state will last until There was no big change in 500 seconds. Although the thermal stability is not as good as expected, it is also quite excellent.
After 500 seconds of copying, the maximum temperature of the core is 85 degrees, which is more obvious than the limit temperature of more than 90 degrees in the era of Snapdragon 820/821. In addition, this new frequency reduction method is also more reasonable. Compared with the original "multi core frequency reduction", the 835 can also keep close to the "full frequency" of 2.36GHz in the process of slowly closing the core, ensuring the single thread performance of the large core. This is a very meaningful optimization for many games that require single thread performance.
photograph
Xiaomi 6 is equipped with a dual 12 megapixel camera, which is similar to the iPhone 7 Plus. The main camera near the outside is the wide-angle terminal, F1.8, IMX386, 1.25 μ m unit pixel size, and four axis optical anti shake. The inside telephoto camera F2.6, Samsung S5K3M3, 1.0 μ m unit pixel size. The telephoto camera can achieve "lossless 2x zoom". In addition, there is a portrait mode to take large aperture photos with depth of field effect.
Xiaomi 6 has changed from the Sony IMX378 of Xiaomi 5s to the same optical anti shake IMX386 scheme as Meizu PRO 6 Plus. The unit pixel size is reduced, but the optical anti shake is increased, and the aperture is also increased to F1.8. It is difficult to judge the advantages and disadvantages from the parameters.
In terms of photo experience, the camera interface of Xiaomi 6 is the same as that of Xiaomi 5s, with automatically triggered HDR and night view modes (the automatic HDR function was added in the development version update on May 5). The HDR and night scene algorithm processing on Xiaomi 6 are both processed in the background, which will not have a big impact on the shutter response of the foreground. It is much better than Xiaomi 5s, where HDR will pause the shooting for more than 1 second.
The multi frame compositing rate and focusing performance under weak light are improved to some extent compared with Xiaomi 5s, but there is still much room for improvement. There is no obvious jam in weak light shooting. Under the current version of firmware, the overall shooting experience is good, except that the shutter response and film speed are not as fast as Xiaomi 5s.
Secondary camera's 2x long focus and virtual portrait
The use mechanism of Xiaomi 6 telephoto camera and iPhone 7 When the Plus is close, it will be called when the light is good. However, it not only requires less light than the iPhone, but also can complete the virtualization function by relying on the main camera alone when the secondary camera is blocked. However, the depth of field changes at different distances and the freedom to select the focus will be limited. In addition, like other dual cameras, the Xiaomi 6 dual camera is also relatively hot, and both the camera and the fuselage will soon become hot.
In portrait mode, switch the focus from left to right and from far to near:
Model with focus on the leftmost side (far away)
Model with focus in the middle (middle distance)
Model with focus on the right (close range)
Xiaomi 6's double camera virtualization effect has improved to a certain extent compared with Xiaomi 5s Plus. Object edge recognition is more accurate, and there will also be differences in the intensity of virtualization between near and far objects. The effect has entered the stage of availability. However, when encountering complex objects, there may still be problems of intermediate leakage or excessive edge virtualization, which belongs to the mainstream level of dual camera products of the same generation.
In terms of the actual image quality of the telephoto camera, the equivalent focal length of this secondary camera is 52mm The camera is 27mm, which is less than twice as long as strictly speaking. The focal length is also slightly shorter than 57mm of the iPhone 7 Plus telephoto. Under the same conditions, the viewing angle is slightly larger than that of the iPhone, but it will be less discriminative. The main problem is that the metering and focusing performance is not as good as that of the iPhone, which affects the performance. Even the metering and white balance are different from the main camera. However, a telephoto camera is very useful in scenes that need discrimination. The local discrimination in the daytime is enough to be superior to all normal mobile phones.
Main camera takes photos
Natural light scene
Light scene
The HDR effect of Xiaomi 6 is better than that of the previous generation, and its impact on color saturation and white balance is smaller than that of the previous generation. However, there is still a big chance that it will lead to brighter metering and a certain loss of discrimination, but it has finally entered the field of usability.
The main camera of Xiaomi 6 uses a lens with an equivalent focal length of 27mm. The wide-angle/field of view is close to Huawei P10, which is slightly smaller than Xiaomi 5s and Meizu PRO 6 Plus. In terms of glare control, the level of Xiaomi 6 is close to that of Huawei P10, slightly worse than that of PRO 6 Plus and Xiaomi 5s. Among them, the petal shaped flare of Xiaomi 6 and PRO 6 Plus facing the strong light source is more obvious (the impact is not significant, and it can be avoided by slightly deflecting when composing).
Daytime sample sheet 1
Daytime sample sheet 2
Daytime sample sheet 3
Light proof sheet 1
Light proof sheet 2
Light sample sheet 2, center enlarged
Light proof sheet 3
Light proof sheet 3 central magnification
Light proof sheet 4
Light proof sheet 4 central magnification
Light sample sheet 5, center enlarged
Weak light sample sheet 1
Weak light sample sheet 2
Weak light sample sheet 2 central amplification
Weak light proof sheet 3 central amplification
Weak light proof sheet 4 central amplification
Extremely weak light proof sheet
Extremely weak light sample central amplification
Metering and white balance: The imaging style of Xiaomi 6 is similar to that of Xiaomi 5s, both of which have a tendency of brighter metering, but the degree is more obvious. The white balance of Xiaomi 6 is more stable than that of Xiaomi 5s, and the white balance is less likely to deviate significantly. However, the white balance tends to be cold and blue-green, which is not as accurate as Huawei P10 on the whole, and is farther away from PRO 6 Plus.
Tolerance/Contrast/Saturation: The default metering of Xiaomi 6 is obviously bright, which affects its tolerance and brightness details. In the default mode, the contrast/saturation tends to be double low. After HDR is turned on, it can improve to some extent, but it will cause metering and color deviation. The color saturation drops faster than other machines after the light becomes worse, which is not so good.
Discrimination/noise control/texture comparison: The ultimate discrimination power of Xiaomi 6 in the daytime is at the normal domestic flagship level. It is not different from Xiaomi 5s and Huawei P10 (our testing machine is the same as Mate8 in that year, and there is a certain probability that it will lose focus in the future). The small input sharpening algorithm and the PRO 6 Plus with better light measurement are in place. The application force of Xiaomi 6 noise points is heavier than that of Xiaomi 5s and P10. It is unlikely to see obvious noise points, but the weak light discrimination is less than that of Xiaomi 5s.
In general, Xiaomi 6 has fallen back on the performance of the main camera. Xiaomi 6 has lost to Huawei P10 and Xiaomi 5s, and has a clear gap with the domestic first tier PRO 6 Plus.
Endurance&Charging
Xiaomi 6 is equipped with 3350mAh battery. After 30 minutes of large-scale games (NBA 2K15), 30 minutes of wifi and 4G Internet access, 1 hour of music playing and 30 minutes of local video playing, the remaining power is 79% after a total of 3 hours of endurance test.
The endurance performance of Xiaomi 6 is as aggressive as expected. The game and web browsing parts are more power-saving than Xiaomi 5s. In the case of more radical performance tuning, even though the game part consumes 3% more power than the S7 edge, the total score can still be leveled, and the front flagship of the following 4000mAh batteries can be easily rubbed on the ground. I have to sigh again that the 10nm process is good.
Xiaomi 6 uses the Qualcomm QC 3.0 standard, and the maximum output of the charging head is 9V/2A or 12V/1.5A, which is the same as the parameters of the previous generation QC3.0 charger (MDY-08-EH). The charging voltage is mainly around 5V-7V, and it is short when the power is below 5% power The peak power can reach 19W, and the main time is about 15W. Today, this power output can only be said to be in order.
Xiaomi 6 charging curve
Simple comparison of charging time points
Although the charging power is not high, the charging speed of Xiaomi 6 is fast: from 5% to 100%, it can be charged from 15 minutes to 31%, 30 minutes to 54%, 45 minutes to 76%, and one hour to 91%, Trickle charging of the last 10% of the electricity takes about half an hour to charge, It takes 1 hour and 28 minutes to fill.
summary
The predictability of Xiaomi 6 is so high, even a little boring: the quality of the screen that spent a lot of space in the press conference has not been substantially improved, MIUI is still full of advertisements, and there is a certain decline in experience, long focus dual camera has just entered the stage of availability, and the main camera still has a small decline. However, after Xiaomi returned to the active and feverish training, the Snapdragon 835 showed its powerful performance and still ferocious power consumption performance.
Plus 2999 yuan, you can buy the exclusive ceramic version (although this version is still not very large) and the starting price of 2499 yuan. These small problems can be completely forgiven. The advantage of Snapdragon 835 makes Xiaomi 6 have no rivals at the same price before one plus five. The final conclusion is very simple and rude: Xiaomi 6 There is no domestic flagship with the highest cost performance and strongest performance.
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