Dual core X86 mobile phone Lenovo K900 evaluation | Ainongji - 上海419贵族宝贝-上海后花园1314-上海品茶网-阿拉爱上海

Since Intel released the Medfield platform for the mobile market on CES2012, it can be said that Intel has made a strong landing on the Android battlefield. In addition to the familiar Z2460, the dual core Z2580 has also come into our sight. As the first mobile phone equipped with Z2580, Lenovo K900's actual performance has also made many users look forward to enjoying the power of the dual core X86 mobile phone!

Lenovo K900 parameters

Model: LENOVO K900

CPU： Intel Atom Z2580 2.0GHz (dual core four thread)

GPU： Imagination PowerVR SGX544MP2@533MHz

Operating system: Android 4.2.1

Screen: 5.5 inch 1920 * 1080 resolution AH-IPS screen

SIM card type: microSIM

Storage space: 16GB (expansion not supported)

RAM：2GB

Connection: Bluetooth ®, Wi Fi ® IEEE 802.11 a/b/g/n, Micro USB, 3.5mm audio interface

Camera: 13 megapixel backlit F/1.8 aperture 2 million yuan in advance.

Battery: 2500mAh, non removable

Mobile phone size: 157 * 78 * 6.9 mm

Mobile phone weight: 162g

In terms of parameters, the K900 has many highlights. First, it is the first mobile phone equipped with Z2580, and it uses a 5.5 inch 1080P screen (previously only Optimus G Pro used this type of screen). In addition, the K900 camera also uses F1.8 aperture with Sony's 13 million pixel stack sensor.

appearance

K900 front adopts pure black design, and the style is very masculine ▼

There is a huge front camera next to the receiver ▼

There are three touch buttons at the bottom with white backlight ▼

A lot of wire drawing metal technology is used on the back, which gives people a sense of texture ▼

There is a stack type 13 million camera on the top, and the aperture reaches F1.8. There are two LED fill lights beside it, and a noise reducing microphone ▼ is in the middle

The speaker is located at the bottom, and there are also protrusions on the shell to prevent the sound from being blocked when placed horizontally ▼

On the right is the key switch and SIM card slot ▼

On the left is the volume button ▼

The top is very flat ▼

At the bottom of the body are micro USB ports, 3.5mm headphone ports, and microphones ▼

The appearance design of K900 is full of masculinity, and the heavy use of metal materials on the back greatly improves the texture. The metal material and the plastic middle frame also have a high degree of fit, which gives a very meticulous feel. The K900 has a 5.5 inch full HD large screen, but it is also too large and wide to handle with one hand.

Screen performance

The K900 uses a 5.5 inch 1080P large screen for screen performance. The object of our screen comparison is Nubia Z5.

Solid color representation (K900 at the top, Z5 at the bottom) ▼

Of course, light leakage is still a common problem of IPS (K900 at the top, Z5 at the bottom) ▼

Comparison of colorful pictures (K900 at the top, Z5 at the bottom) ▼

Original drawing ▼

In terms of color performance, the K900 performs well on the whole except that some of its color saturation is a little too high, and it also reaches the level of high-end IPS screens.

viewing angle

Seen from the side, the K900 screen looks dim ▼

At the diagonal angle, there is a certain color deviation, but it is also within the acceptable range ▼

Although the screen has reached 5.5 inches, the resolution has reached 1920 * 1080, so the PPI of K900 is up to 400, so the particles of the screen can no longer be felt by the naked eye from the normal use distance. The following is a live shot ▼ showing the font magnification

UI

K900 lock screen uses a shape of "four leaf clover". By dragging the shortcut at four corners, you can unlock, take photos, information and phone four operations ▼

At first glance, the system launcher is not very different from the general Android, but after entering the desktop settings, I found that there is something different. There are many user-defined options in desktop settings, including icon settings, special effects settings, etc. ▼

K900 "Le Desktop" also has a secondary menu, and the effect of entering the secondary menu and the sliding effect of the secondary menu can be customized ▼

There are five shortcuts in the drop-down list, which can be customized. Below the drop-down list are notifications of weather, Le Safe, Lenovo Power Saving, etc. Also, because the K900 system is based on Android 4.2.1, you can display shortcut ▼ in full screen through double finger pull-down

The setting of the shortcut in the drop-down bar also supports the management ▼ of application notifications

The system setting interface is divided into three columns, slightly confused. It can be seen from the system information that the K900 system is based on Android 4.2.1 ▼

The K900 comes with a 16G ROM, which can be used up to 10G. RAM control is excellent, 1.3G ▼ remains after startup

performance

As for the performance of the Z2580, I believe everyone will be very interested in it. How powerful is this high-frequency dual core four thread processor?

Theoretical test

Antu rabbit evaluation

The test score is very high, reaching 27588 points, which is the highest score except for the Galaxy S4 using Exynos 5410. From the mobile phone's score, we can see that the RAM performance is particularly high. The RAM performance of the ARM processor evaluated in the past is far behind that of the K900. In terms of 3D drawing performance, the resolution is too high, so even the high-frequency version of the SGX544MP2 does not exceed 7000 minutes, which is also expected ▼

Anthare 3D test

The results here are consistent with the 3D drawing test scores in the rabbit evaluation. The average frame number reaches 25.4, which shows that the SGX544MP2 is still struggling with 1080P resolution ▼

Vellamo

This is a software to test the performance of HTML5 on web pages. The score of K900 is fairly good. The score of HTML5 exceeds 1800, reaching the high-end level. The score of Metal is 716 ▼

Sunspider

To test the web page Javascript performance and measure the CPU's single thread processing capability, K900 scored very high in this test. In addition to A15 processor and Apple A6X, K900 is at a high level in mobile devices. Because the K900 does not perform well when we use our usual Chrome for testing, we choose our own browser for testing.

The score of version 0.9.1 is very good, second only to Exynos 5410, reaching 725ms ▼

Generally, the score of version 1.0 will drop slightly compared with that of version 0.9.1, and the score of K900 is 913ms ▼

Game Test

Because many netizens are worried about the compatibility of Z2580, we also join the test of large-scale games here. Since K900 does not have Google service package, some large-scale games cannot participate in the test.

Dungeon Hunter 4

Gameloft's latest ARPG masterpiece, K900 can play normally, without mapping errors, slightly stuck (default special effects) ▼

Top Speed Car 17

The K900 has a built-in top speed car 17, but the picture quality of this version of the game is not high. After we reinstalled a Top Speed Car 17 (PowerVR data package), the image quality has improved significantly, but the smoothness has been significantly affected. Of course, the version of the best speed car 17 here is still relatively old, and the support for multi-core SGX544 mobile phones (such as the I9500 and K900) is not so good. We can look at the optimization effect after the game is updated ▼

Real Racing 3

Real racing 3 is also a game with very high requirements for mobile phone hardware. Lenovo K900 has low special effects in this game, and its fluency is average ▼

From the above games, the compatibility of K900 games is not a problem. Generally, we only need to use the PowerVR series data packets to use large games. The current problems mainly lie in the optimization of games. X86 is inefficient in running current Android games, and the old version of the game does not support multi-core SGX544 (mainly due to the poor picture quality and general smoothness of the game).

For the smoothness of K900, you can watch this video demonstration:

Video decoding

We also use some high-definition videos to test the K900 video decoding

The videos used are as follows (if not specified, the video player is provided)

720P group

WMV Microsoft WMVHD official video, 1280 × 720, VC-1, MP@HL Hard solution, smooth

AVI The Circle of Realm trailer, 1280 × 720, Xvid Hard solution, smooth

RMVB Dark God Theater, 1280 × 720, RV40 Soft solution, smooth

FLV AOM OP, 1280 × 720, H.263 Soft solution, smooth

1080P group

MP4 1920*1080，H264(avc1)，AAC，23fps，ref=9 Hard solution, smooth (the same specification supports up to ref=9, ref=10, and cannot be hard solved normally)

MKV Conan Theater Edition 15 trailer, 1920 × 1080, H.264 Main Profile L4.0， Audio coding AC-3 The built-in browser does not support it. The BSPlayer software solution is not smooth. The MX Player+X86 decoder can be hard decoded

WMV Microsoft WMVHD official video, 1440 × 1080, VC-1, MP@HL Hard solution, smooth

From the perspective of K900's decoding capability, it is more than enough to deal with ordinary videos. It is also a pleasure to watch videos on the 5.5 inch super large full HD screen, but there are not many videos supported by hard solutions.

photograph

K900 uses Sony's 13 million pixel stack sensor, which is also the same level as many high-end Android phones. However, the aperture of K900 has reached the highest F1.8 in the mobile phone, which is larger than other stack F2.2 in aperture. Before seeing the actual shooting effect, let's take a look at some interfaces and settings of K900's super camera.

View interface ▼

Related settings ▼

Multiple filters ▼

Multiple shooting modes ▼

Real time sample (click to view the original picture) ▼

We will introduce the specific level of K900 photography in the next special evaluation of photography.

temperature

The Z2580 has a high CPU frequency, so many users are worried that it will generate a lot of heat. However, after 20 minutes of running a large game, the front temperature is 43 degrees Celsius, and the back temperature is 34 degrees Celsius (room temperature is 26 degrees Celsius). The back is made of a lot of metal materials, so although the temperature of the back is not high from the perspective of temperature, the palm feels a bit hot due to the fast heat conduction of metal ▼

signal

K900 supports HSPA+network, 3G network performance is normal, and the indoor use of speed measurement software can reach 700kB/s for downlink. But in terms of calls, the voice is relatively low.

Endurance

I believe many netizens will be very interested in the endurance of K900. Here we also observe the power consumption of K900 through 3G Internet access and game testing.

Half an hour dungeon hunter 4 test, power consumption 22%.

Half an hour of 3G Internet test, 11% power consumption.

summary

As the first dual core X86 mobile phone, the K900 has attracted the attention of many users with its excellent hardware configuration, strong shape and large screen. In addition, the publicity of films and advertisements paved the way for its listing. From the experience of its actual use, the K900 is commendable in terms of screen and photo performance. In terms of the hardware performance we focus on, the theoretical performance of the Z2580 is undoubtedly very powerful. The ultra-high main frequency and strong memory performance make many performance focused users salivate. However, constrained by the Android application ecosystem dominated by ARM, the Z2580's super performance cannot be brought into full play, which is mainly reflected in the efficiency of some daily software and the effect of large-scale games. For the compatibility and power consumption problems that users are worried about, the performance of K900 is satisfactory. It is believed that with Intel's efforts, it will have a firm foothold in the Android market, and more applications will develop X86 library applications based on the characteristics of Intel chips. Only then can the super powerful SoC like Z2580 make a great effort.

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