The K40 series was officially released last night. The starting price of the standard version 1999 and the Pro version 2799 yuan continues the tradition of the ultimate cost performance of Redmi, and has also caused a high degree of popularity in the mobile phone industry Love to play computer games I also got and started a K40 Pro with 8+256GB.
Specifications
In terms of main parameters and specifications, we can directly see the above figure. This time, the configuration of the three models of K40 series is not very different. Compared with the K40 standard version, the main reason for K40 Pro is that the SoC is upgraded from Snapdragon 870 to Snapdragon 888, and the main camera is changed from 48 million IMX582 to 64 million IMX686; Compared with K40 Pro, K40 Pro+changes the main camera to a 100 million pixel HM2. The three models are consistent in overall appearance, screen, sub camera, speaker, battery/fast charge, and linear motor.
Packaging/appearance
There is no environmental protection version or non environmental protection version of the K40 series this time. The package is all black. The whole series is equipped with a charging head/data cable as standard and a transparent protective case is included.
(K30 Ultra and K40 Pro)
The previous two flagship K20 Pro and K30 Pro of Redmi have both adopted the true full screen scheme of the elevating camera. This time, the K40 Pro is changed to a central perforated screen design, with the front aperture of only 2.76mm. In some slightly dark backgrounds, the sense of presence has been reduced very much, but the effect of the full screen hint is still weaker than that of the previous generation.
Due to the absence of a mechanical structure such as a lift camera, the thickness and weight control of the whole machine have also been optimized to a certain extent. The thickness has reached 7.8mm, and the weight has been controlled at 196g, which is at the same level as the Xiaomi 11. Although it is not very thin, the grip feel has been significantly improved compared with the previous generation, and there will be no sense of top weight and bottom weight of the lift full screen mobile phone.
When we came to the back, the version we got this time was the official main ink feather version. It was said that the design inspiration came from the Damascus steel knife. The body was made of black base, bright glass, and the light would reflect lines. The texture was significantly improved compared with the previous K series products, but at first sight, there was always the illusion that the back was not properly pasted with a film and bubbles. Those who do not like bright glass and are worried about being easily stained with fingerprints can also choose the sunny snow and fantasy versions of AG glass.
The rear camera module, like Xiaomi 11, adopts a stepped matrix design, but it is relatively longer.
The K40 series adopts side capacitive fingerprint instead of the common optical fingerprint under the screen of OLED mobile phones. The K40 Pro fingerprint module is integrated on the power key, which does not adopt the concave design like the same type of mobile phones, but fits the radian of the frame. At the same time, the use of side fingerprint does not have a negative impact on the body thickness.
It has to be said that the capacitive fingerprint is still at the end of the fingerprint under the voltage stabilizing screen in the "second solution" experience, and it can be unlocked with a light touch. This is impossible under the screen, but some users may feel that the side fingerprint is not "advanced" under the screen.
screen
In terms of the screen, the 6.67 inch E4 AMOLED K40 Pro screen actually measured the global manual maximum brightness of 411 nits, and the local manual maximum brightness of 497 nits.
The settings include adaptive mode, primary color mode, bright mode and advanced mode for selection.
Color expression:
The color temperature in the default adaptive mode is 7461K, covering 100% sRGB, and 97.8% P3 color gamut; The average Δ E of the corresponding sRGB gamut is 4.1, and the average Δ E of the corresponding P3 gamut is 2.6;
(K40 Pro primary color mode color standard)
The primary color mode has the best performance in the measured color accuracy. The average Δ E of the corresponding sRGB color gamut is 1.3, and the color temperature is 6492K, which will be warmer to the naked eye.
The K40 Pro screen also supports dynamic picture compensation and super resolution functions, and it is the first time to add a "true color display" function similar to iPhone True Tone; In addition, our firmware (MIUI 12.0.3 version) does not have the DC dimming option, and using a third-party tool to call out the DC dimming option cannot actually take effect. It is unclear whether the same situation exists in the mass production version of the firmware.
In terms of touch control, K40 Pro supports 360Hz touch sampling rate. The touch chip shows that the touch sampling rate is from Duntai, and there is even a record of 404 when using ADB to detect the touch sampling rate (however, the sampling rate detected by ADB will have some errors). There is a certain amount of touch error during daily sliding under the current firmware.
On the whole, the quality of the K40 Pro screen is the first tier in the current 2000 to 3000 yuan range. Of course, last year, Redmi gave way to Xiaomi's 10 series with a high brush. This year, Xiaomi also left a hand in 2K resolution. Anyway, it needs a better specification and more money.
performance
The K40 Pro is equipped with the combination of Snapdragon 888, UFS 3.1 flash memory and full blood LPDDR5. From the theoretical test, the CPU and GPU are at the normal level of 888, and the random write and continuous read/write performance of flash memory is not as good as the two 888 flagship.
Comparison of theoretical test data:
CPU
GPU ：
Flash Memory ：
In terms of the game, we simply measured the 90 frame+ultra-high resolution+extreme image quality of Glory of the King. This load is much larger than the previous 60 frame mode. On average, it can reach 90 frames, with a certain degree of fluctuation in the second half. The CPU temperature displayed by PerfDog reaches 54~55 ℃, which is somewhat hot on the body.
photograph
In terms of cameras, it can be seen from the specifications of the three cameras that K40 Pro did not stack the main materials on the image this time, and tried to be practical under the premise of controlling the cost. It added the 5 million pixel long focus macro camera with good wind rating last year, but the whole series of main cameras do not have optical anti shake, nor are they equipped with a medium focus or a long focus lens, so their telephoto ability is relatively weak.
Take a brief look at the sample sheet:
(Ultra wide angle)
(Main camera)
(2 times for main camera)
(Main shooting routine night scene)
(Macro)
Charging and others
Due to the short starting time, there is no complete endurance test here. In terms of charging, the K40 Pro continues to use the 33W wired solution. Compared with the K30 Ultra, which has the same battery capacity and charging specification, it is more robust in the first half of the charging power, somewhat similar to Samsung's 25W tuning style. The first 18 minutes will maintain the highest power between 26 and 27W, from 19 minutes to 40 minutes it will drop to 22 to 23W, and 53 minutes will enter the trickle state, Then the charger will continue to output for about 10 minutes.
However, considering that 65W flash charge has been popularized in the European and Canadian system next door, it is said that the iQOO Neo 5 fast charge will also be 66W, and the 33W K40 Pro will suffer from both the first half of the fast charge speed and the filling time when facing these opponents.
The K40 Pro is equipped with dual stereo speakers that support Dolby's full scene sound. Both the top and bottom of the phone are equipped with speaker openings. In terms of the actual sense of external listening, the performance of the K40 Pro's dual speakers exceeds the K30 Ultra by at least one gear. There is still a gap between the volume and sound level of Xiaomi 10 Pro, the strongest "music phone" in our home.
In terms of vibration feedback, although the X-axis linear motor is officially used, the overall vibration sense is not as strong as the Z-axis motor of the K30 Ultra from the perspective of the tuning of the current version of firmware.
summary
K40 Pro and the whole K40 series are obviously price war oriented products. The main selling points are flagship SoC, 3000 mid-level screens and dual speakers, which ensure the strongest basic performance and audio and video experience. Other parts, such as fast charging and cameras, strive to be adequate rather than perfect. It is impossible to pursue all aspects. There is no perfect mobile phone at this price, It mainly depends on whether you can accept this knife technique.
Last year, there were many models in the Redmi K30 series product line, but a careful inventory will show that none of the models with the flagship Snapdragon chip of high brush OLED+- the K30 Pro has no high brush The K30 Ultra has no Snapdragon core, and the K30S has no OLED. This type of model is just the price performance (such as One Plus 8T, realme X50 Pro, iQOO 5) that was popular at the 3000 yuan gear in the second half of last year. The emergence of the K40 Pro can be said to make up for this shortcoming.
In terms of purchasing suggestions, this time the K40 standard version of the Snapdragon 870 is 800 yuan lower than the Pro version of the 888. In fact, I recommend starting the standard version. You should know that last year's chip responsibility at this price was the Tianji 1000 or even the Snapdragon 765G. Considering that the price of the 870 model would be reduced further, there would be no pricing space for other mid-range chip models. Buying the K40 standard version this year, It's hard to buy losses.
As the lowest priced Snapdragon 888 model at present, the K40 Pro is also worth getting started. The 6+128GB version is obviously used at the card price. From a practical point of view, the 8+128GB and 8+256GB versions may be more appropriate. Of course, judging from the current online debut pre-sales, Redmi may have "underestimated the enthusiasm of rice noodles" again this time.
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