It's a little different this time - Xiaomi 4 begins to evaluate | likes playing computer games - 上海419贵族宝贝-上海后花园1314-上海品茶网-阿拉爱上海

Xiaomi officially launched its new flagship Xiaomi Mobile 4 on July 22. Unlike the previous flagship top configurations, Xiaomi 4 did not show overwhelming performance advantages this time, but improved other user experiences while maintaining high-end performance levels. The addition of stainless steel frame design for the first time also makes Xiaomi 4 stand out. What's its actual use experience? Let's start today's evaluation:

As the new flagship of Xiaomi, what are the differences in hardware specifications between Xiaomi 4 and Xiaomi 3? Let's see the following comparison:

Specification Comparison Table of Xiaomi 3 and Xiaomi 4 Unicom

From the perspective of hardware specifications, the Xiaomi 4 Unicom version has several hardware improvements compared with the Xiaomi 3 Unicom version. First, in terms of CPU frequency, the Xiaomi 4 version is 200MHz higher than the Xiaomi 3 version, which will have some advantages in instantaneous performance. Both belong to Snapdragon 801 series, with the same GPU frequency. The Xiaomi 4 adopts 3G Ram, reaching the mainstream level of the current flagship machine. The flash memory is upgraded to eMMC5.0, which will greatly improve the daily storage performance. Xiaomi 4 has also improved a lot on the camera. Although the rear camera is 13 million pixels, Xiaomi 4 uses the Sony stack type second generation IMX214 sensor with 6P lenses, and the aperture reaches F1.8. The front camera has increased from 500 pixels to 8 million pixels. It uses Sony IMX219 backlight sensor, 5P lens, and aperture has also reached F1.8. The overall specification has been greatly improved compared with Xiaomi 3. Even so, Xiaomi 4 still doesn't use the expected Snapdragon 805 or Tegra K1, which seems to have no overwhelming advantage over competitors in terms of performance.

appearance

The appearance of Xiaomi 4 is quite different from that of the previous works. The addition of the metal middle frame makes it look more scientific and technological. Although the size of Xiaomi 4's screen is the same as that of Xiaomi 3, the screen panel and touch screen technology have been improved. It appears very black when the screen is turned off, and the screen border does not show ▼

Xiaomi 4 adopts an ultra narrow frame design, which is easier to hold with one hand than other 5-inch mobile phones ▼

The earpiece is designed with grooves, which may cause dust accumulation in the earpiece. The sensor is on the left side of the earpiece, and the front camera of 8 million pixels is on the right side. The front camera of Xiaomi 4 uses the IMX219 sensor, with a large aperture up to F1.8 and strong parameters ▼

There are still three touch keys at the bottom of the screen, namely Menu, Home and Return. There is a breath light ▼ below the key

The key has a weak white backlight, and you can select Close ▼ in the menu

LED breathing light, small size ▼

The back of Xiaomi 4 adopts grating back cover and inner membrane transfer technology, which makes the texture more outstanding than ordinary plastic materials ▼

The outer layer of the back cover is a frosted surface, and the inner layer shows a small checkered pattern. The visual effect is very special ▼

The rear camera adopts Sony IMX214 sensor, 6P lens, F1.8 large aperture, and is equipped with a led fill light ▼

The camera is slightly protruding, which can almost be ignored ▼

There are brand logo, WCDMA mobile phone and other signs below ▼

Unlike Xiaomi 3, the back cover of Xiaomi 4 has a radian, so it can be held more closely to the palm ▼

The top of Xiaomi 4 is a 3.5mm headphone connector and infrared sensor ▼

The bottom is the speaker and micro USB interface. It can be seen that there are partition bars ▼ on the top and bottom of the phone due to the metal frame

On the right side of the phone are the volume key and power key ▼

The left side of the phone is the card slot, and the whole frame is of excellent workmanship. The only thing to be picky is that the card slot and the frame are slightly uneven ▼

The card slot can be pushed out with the built-in card pin. The card slot is also made of metal. Use micro SIM card ▼

The bevel on the frame adopts the mirror process. According to experience, this mirror process is relatively easy to scratch ▼

Process ▼ of back corner

Screen display

Xiaomi 4 uses an IPS screen with high color saturation. The panel is made by Sharp/JDI. The NTSC color gamut reaches 84%, while the generally excellent IPS mobile phone screen is only about 70%. Such a screen also brings better color performance to Xiaomi 4. Here are some live photos of comparison with Mi 3:

From this live shot, the skin color of Xiaomi 4 is obviously red, while that of Xiaomi 3 is yellow. Both are distorted. Xiaomi 4 will be slightly more pleasing to the eye (left Xiaomi 4, right Xiaomi 3) ▼

The following two live photos better show that Xiaomi CEO Lei Jun described the Xiaomi 4 screen as "red is redder, blue is bluer" during the press conference. The characteristics of high saturation of Xiaomi 4 screen can be seen at a glance (Xiaomi 4 on the left, Xiaomi 3 on the right) ▼

It is shown in white. It is believed that the judgment has been made. The white of millet 4 is obviously more pure, while millet 3 is yellow, and the bottom is also black (millet 4 on the left, millet 3 on the right) ▼

In addition, we use another example to show the color of Xiaomi 4's screen. When we display the same picture, Xiaomi 4's screen is obviously more bright and saturated than PC (ASUS PB238Q, IPS panel) ▼

Therefore, users of Xiaomi 4 may encounter such a situation: the photos viewed on their mobile phones are bright, but when viewed on their computers or other mobile phones, they immediately feel that the colors are dim.

From the above comparison test, Xiaomi 4 is indeed much better than the previous generation in terms of color performance, and the overall quality of the screen is quite high. However, the more colorful color style may take some time for new users to adapt.

UI and System

Xiaomi 4 uses MIUI V5 instead of the expected MIUI V6, but there are still some functional improvements compared with Xiaomi 3:

From the system launcher, Xiaomi 4 is not very different from the previous Xiaomi products, but several pieces of solid color wallpapers are added ▼

Check the system information. Before the deadline, the latest MIUI version of Xiaomi 4 was 4.7.22, based on Android 4.4.3, and the kernel was 3.4.0 ▼

Since everyone is familiar with MIUI V5, here are just a few special features:

Automatic identification of fraud, harassment, fishing and other calls ▼

When making a call to an operator, you can even display the voice command menu ▼

Since Xiaomi 4 has a new infrared sensor, it also has a remote control function like many high-end mobile phones. The following is a screenshot of Xiaomi remote control, adding a new appliance ▼

When selecting the brand of electrical appliances, the logo of each electrical appliance brand is displayed, which is more intuitive ▼

Here we use Gree air conditioner for adaptation, which can adjust the temperature, working mode and other simple operations ▼

performance testing

We got the 16G version of Xiaomi 4, and the actual usable capacity exceeded 12G ▼

Since Xiaomi 4 uses Android 4.4.3, the GPU driver is relatively new, and the version number is V66 ▼

The Ram capacity of the whole machine reaches 3G, and the available power on exceeds 2G ▼

When Xiaomi 4 was released, the "traditional link" of Xiaomi mobile phones - running points was omitted. Here we also reveal the performance of Xiaomi 4. In fact, the performance of the MSM8X74AC has reached the bottom, and the rest is to see how the optimization level of each company is. Let's not talk about other things. First, let's let everyone "take" Anthare. Anthare in V4.5 ran more than 36000 points, which is not very eye-catching, but slightly higher than the Xiaomi 3 Unicom version ▼

GPU score exceeds 9000, which is also a relatively normal score ▼

With the latest version of Anthare V5 Alpha2, due to the significant increase in GPU scores and the emphasis on single core performance, the scores of Snapdragon 801 series processors will increase significantly, including Xiaomi 4, whose total score exceeds 44000. Although not very high, it is also a very good result ▼

Graphic score exceeds 14000 ▼

Next, let's test the other running points, Pi, and test the floating point performance of the CPU. Xiaomi 4 performed well. It took less than 27 seconds to complete the 10 million bit operation ▼

Web page javascript test Sunspider 1.0.2, test CPU single core computing performance, use Chrome beta browser, and the final score is 710ms, which also meets our team's performance expectations of MSM8X74AC ▼

RAR compression test, the measured speed reaches 1262KB/s, which is not different from other Snapdragon 800/801 mobile phones ▼

A1 SD Bench， Test the reading and writing speed of eMMC flash memory and the speed of RAM. Xiaomi 4 uses the eMMC 5.0 standard chip, so it has a good performance in flash memory reading, exceeding 220MB/s, while the writing performance is modest, about 55MB/s. The most amazing thing about Xiaomi 4 is that the RAM copy test exceeded 10000MB/s, which is also the highest ▼ of the mobile phones we have tested

A1 SD Bench Comparison Chart:

Due to the addition of eMMC 5.0, the reading and writing speed of Xiaomi 4 is faster than that of the eMMC 4.5 of ordinary mobile phones. In particular, the reading speed has reached a very high level, which is significantly ahead of some tf cards.

GPU graphics performance test GFXBench 3.0, Manhattan scene off screen 11.6 frames, Tyrannosaurus Rex scene off screen 27.7 frames, and other Snapdragon 801 mobile phones at the same level ▼

3DMark, more than 20000 points is also a good score ▼

Comparison diagram of the number of graphic test frames:

The red column in the figure is the frame number of Xiaomi 4. From the comparison figure, except for Tegra K1 and Snapdragon 805, the two invincible "next generation" opponents, Xiaomi 4's frame number can be described as overwhelming, and it is also easy to cope with 1080P large-scale games.

From the above tests, the theoretical test performance of Xiaomi 4 is not very outstanding. The flash point is the RAM Copy speed in A1 SD Bench, which has reached the level of 10000MB/s. It seems that Xiaomi 4 is powerful in memory. In other tests, as a mobile phone equipped with MSM8274AC, the performance of Xiaomi 4 met our expectations and the needs of most users. However, this level is still some distance from the ultimate performance. Before the deadline, the mobile phone with the strongest CPU performance was from the Samsung Galaxy S5 (Exynos 5422), while the mobile phone with the strongest GPU was from the Samsung Galaxy S5 Broadband LTE-A (Snapdragon 805). Xiaomi wants to take the first place in performance, and I'm afraid it will wait until the next flagship is released.

photograph

Although the Xiaomi 4 rear camera still remains at the level of 13 million pixels, its sensor has been upgraded to Sony's latest IMX214, and at the same time, it uses 6P lenses, and its aperture has reached F1.8. What is the actual photo taking effect? Here we also show some samples:

Outdoor macro distance (click to view the large picture) ▼

The details are good, but the color is not fresh enough. However, the color of this style will be more gorgeous when combined with Xiaomi 4's screen display.

Indoor imaging (click to view the large picture) ▼

Night view (click to view the large picture) ▼

The resolving power of the night scene is general. Because the ISO of the night scene is adjusted very high under the automatic gear, the noise is large, and the control of glare needs to be strengthened.

HDR (click to view the large picture) ▼

You can compare the effect of the upper and lower pictures (turn off and turn on HDR respectively). The HDR effect of Xiaomi 4 is still very significant, but the processing effect is a bit exaggerated, resulting in serious distortion of some picture details and unnatural transition. In addition, it is worth mentioning that Xiaomi 4 supports hardware real-time HDR. After being enabled, the imaging speed of HDR shooting will be greatly improved, and there is almost no need to wait.

High dynamic flash (click to view the large picture) ▼

Turn off flash ▼

Normal fill light ▼

From the comparison of the above three photos, the high dynamic flash of Xiaomi 4 looks more natural than the normal flash. It is achieved by combining the effect of two photos of turning off the fill light and turning on the fill light. The above example is an extreme case. If the light is more sufficient, the effect will be more obvious.

From the actual photo samples, the clarity of Xiaomi 4 in daylight imaging is satisfactory, but the author suspects that the camera deliberately reduces the color saturation due to the high saturation of the screen. In this way, the color of the photo will be balanced when it is displayed on Xiaomi 4, while the color saturation of the same photo is low when viewed on other devices. In the night scene, the combination of IMX214 and large aperture lens ensures the brightness of the night scene of Xiaomi 4, but the algorithm and anti glare performance of the night scene still need to be improved.

summary

From the situation of this initial evaluation, the performance of Xiaomi 4 is still impressive. Better workmanship and fuselage design than ever before, as well as considerable performance improvement, make this new flagship of Xiaomi more competitive. Xiaomi 4 has adopted a new screen panel and camera module. The benefits of hardware upgrade are obvious to all, but there is still much room for improvement in screen color matching and camera optimization. On the basis of SoC, Ram, eMMC and other basic performances, the configuration of Xiaomi 4 has also reached the current high-end level. I believe we will not be disappointed in the smoothness and response speed of the whole machine. In addition, for Xiaomi 4 at this stage, many users are disappointed that it does not support 4G. After all, mobile 4G has been commercially available, and China Unicom and Telecom 4G have also begun to try out in many cities. The first batch of Xiaomi 4 supports WCDMA and GSM networks. Compared with Xiaomi 3, the improvement of Xiaomi 4 in all aspects is obvious, but the removal of an LED fill light and the lack of NFC module are puzzling. The difference of 500 yuan between the two companies is due to better airframe design, materials and overall improved performance. Personally, the author recommends Xiaomi 4.

For more tests of Xiaomi 4, please pay attention to our next detailed evaluation.