I prefer the English name of K40 game enhancement version: K40 Gaming。 It was officially released on the evening of April 27 and is the first game phone of the Redmi family. Starting from 1999 yuan, the Xiaolong 870 was replaced with Tianji 1200, and most of the peripheral configurations such as materials, batteries and endurance were strengthened. Many K40 users are still confused about why they were stabbed by a "game phone".
How about the new machine? It took several days to report to everyone.
parameter
In terms of specifications, the K40 game enhancement version is 8.3mm thick and 205g heavy. 6.67 inch 120Hz 1080P+central perforated CStar OLED screen, 480Hz touch sampling. Tianji 1200+5065mAh battery+67W fast charge. 16MP front, 64MP (OV64B) main camera+8MP (IMX355) ultra wide angle+2MP macro. There are infrared/NFC/JBL dual switches.
6+128 version 1999 yuan
8+128 version 2199 yuan
8+256 version 2399 yuan
12+128 version 2399 yuan
12+256 version 2699 yuan
Alchemists have taught that this is an equivalent exchange: the K40 game enhancement version uses performance for peripheral configuration. Compared with the ordinary version of the Redmi K40, a Tianji 1200 has been exchanged for a metal middle frame+AG glass, stronger focus, endurance and charging.
Appearance and workmanship
The package of K40 game enhanced version adds game and mechanical elements. The bright yellow 67W charging head and charging cable are the same model of "K40 Bruce Lee Special Edition".
In the years of environmental protection, it is rare to see such "fancy" data lines, which are both L-shaped and metal shaped. This is also a thread of Xiaomi/Redmi private specification. It has a needle mapping and should be kept well. If the charging head is equipped with other home or ordinary A port cable, it will lose its soul and become an environmentally friendly salted fish.
The model of K40 game enhanced charging head is MDY-12-EF, while that of Xiaomi 11 Pro/Xiaomi 11 Ultra is MDY-12-ES. Although they are all 67W, the K40 game enhanced version has smaller charging head and fewer gears.
Upper K40 Pro, Lower K40 Game Plus
This one is a silver wing version. Except that the power button with fingerprint identification is the same, K40 Game Plus and K40 are totally different:
The back cover of the K40 game enhancement version is more like a game phone than the Black Shark 4. There are many mechanical style line patterns (the outer layer is a complete AG glass). The atmosphere light is placed on the camera matrix (the back light is really only responsible for flashing to others). The double LED flash light is made into a lightning shape.
Two magnetic shoulder keys are placed in the right middle box, and the volume key is moved to the left. There is an additional microphone in the left middle frame. The double lifting hole is also very special, which is the shape of "Matchmaker Rubs the Tortoise Sect Qigong", with an infrared transmitter and a JBL belief sign on the top.
Cold/hot knowledge: Harman Carton has been acquired by Samsung, and it has several sub brands such as JBL, AKG (which has made matching for Samsung Galaxy series), Harman Carton (the Shuangyang belief of Xiaomi 11 series).
Left K40 Pro, right K40 Game Plus
Bottom border contrast. Xiaomi 11 Ultra on the left, K40 Game Plus on the right, K40 Pro on the left, iPhone 12 Pro Max on the right
K40 Game Plus is the first flexible panel OLED+CoP package in the Redmi family:
The central perforated camera has no silver ring decoration, which is one circle larger than K40;
The rounded corner of the fuselage is smaller than K40, the shape is square, and the screen edge washer is thinner and finer, so the quality can be felt immediately;
The width of the lower border is close to that of Xiaomi 11 series, only slightly thicker than that of the iPhone 12 Pro Max, which is excellent.
Workmanship&feel&fingerprint identification&external release&vibration motor
Workmanship: Metal middle frame with AG glass back cover is totally different in texture. If the shoulder key and back cover lines are removed, I would like to use "K40 Pro Plus or K40 Ultra";
feel: The middle frame of the K40 game enhancement version is a little fatter than the K40, and the four R corners become smaller. It is not as comfortable to hold as the K40. But AG glass yyds!
Side fingerprint: Like K40, side solid fingerprint. Fast recognition speed and blind operation. The main weakness is that the identification area is too small. It is recommended to cover the finger area as large as possible when entering;
External release: The maximum volume is OK, and the volume difference between the upper and lower speakers is obvious (upper 1014, lower 1216). The high frequency is clear, with JBL belief. Although there is a clear gap with Xiaomi 10 Pro/Xiaomi 10S, the overall quality is significantly better than K40;
Vibrating motor: The vibration rebound is simple, the vibration force is small, and the overall performance is normal.
screen
Screen micrograph, "star" red and blue sub pixels unique to CSOT ↑
The K40 game enhancement version is a 6.67 inch, 120 Hz, central punched flexible OLED (the supplier is CSOT), 2400x1080440 ppi, 480Hz touch sampling.
The flexible panel has no rainbow lines on the side, excellent visual perception and bright colors. Together with K40 Pro, it is difficult to distinguish height and height with naked eyes, mainly including:
The extreme brightness is slightly lower (the excitation brightness of 650 nits in full white is basically enough);
No factory color comparison, the color is weaker;
There are no functions such as frame patching and AI optimization. There is DC like dimming, but it will be limited to 60 frames after opening. Moreover, as MIUI 12.5 has blocked the "bug" of switching on DC+120Hz after screen splitting, OTA saved it.
The K40 game enhancement version uses 480Hz touch sampling globally, which is not only available in the game, but also 1000Hz for multi finger concurrent, great！
Comparison of objective parameters between Redmi K40 Pro/K40 Game Plus and Xiaomi 11/11 Ultra screens ↑
Adaptive mode, sRGB color standard (corresponding to daily content), average color deviation 4.1, maximum color deviation 6.8.
Standard mode, sRGB color accuracy, average color deviation 2.4, maximum color deviation 5.4, performance is significantly different from K40 Pro with factory calibration.
performance
K40 game enhancement version uses MediaTek Tianji 1200, TSMC 6nm process, CPU part is 1+3+4 architecture, 3.0GHz A78 (512KB L2)+2.6GHz A78 (256KB L2)+2.0GHz A55, GPU is Mali-G77 MC9@886MHz 。
Compared with Tianji 1000+, the latest A78 is used for the CPU large core and super core, supporting UFS 3.1, and the GPU part is slightly overclocking to 886MHz (Tianji 1000+is 836MHz). The theoretical CPU performance is close to that of Snapdragon 870, and the GPU is slightly weak.
CPU：
As it is a testing machine, GeekBench's score is sealed and has no reference value.
This unexpected test of RAR is not affected, and its performance is slightly better than that of the real GT Neo of SoC.
Memory test:
GPU：
GFXBench is also sealed by the engineering machine, but the impact is less.
In 3DMark, the enhanced version of K40 game with better cooling conditions is still slightly better than the real GT Neo.
Flash/Storage:
The K40 game enhancement version uses Samsung's latest 128 layer UFS 3.1 flash memory (KLUEG8UHDC-B0E1). Without the limitations of Qualcomm's platform, like the real GT Neo, sequential read and write performance is fierce.
Baking machine:
The control strategy of K40 game enhancement is very radical, The CPU regulation is normal, but the GPU does not reduce the frequency (yes, this is a game phone) 。
The screen brightness is 200 nits, the room temperature is 25 degrees, and the remaining 10% of the power starts the double baking of CPU+GPU under the "harsh conditions". With 1% power left in the last section, the K40 game enhancement still keeps the GPU fully open
20 minute Elite of Peace HDR+limited frames (PUBG Tool needs to be turned on)+anti aliasing+shadow. There is still room for 60 frames:
20 minute Elite of Peace HDR+90 frames (need PUBG Tool+hide button to open)+anti aliasing+shadow. It's a little hard to stabilize 90 frames in the whole process. Complex driving scenes will fall to about 70 frames, but the thermal stability is good ↓
Summary:
The performance of K40 game enhancement can be directly evaluated by GT Neo, just because K40 game enhancement has better cooling conditions, and some tests have slightly improved:
The actual CPU performance output is slightly weaker than that of the Snapdragon 870. Although GeekBench is 50% better than Snapdragon 870, there is a big gap in RAR test of common application;
The GPU part is simply overclocking, which cannot make up the architecture gap. There is still a segment gap between the GPU and the Snapdragon 870. Of course, it is not as good as the lot of GPU chicken blood version of Snapdragon 865 at the end of last year;
Flash memory has excellent continuous read and write performance, which can easily kill all Qualcomm systems. Random read and write speed is also good.
The memory performance of the two Tianji 1200 models is slightly lower than Xiaomi 10S of Snapdragon 870+LPDDR5, but this gap is not bad (below 888 Snapdragon, there is no need to tangle with LPDDR4x or LPDDR5, because it can't open the gap anyway).
Personally, I agree with the statement that "Tianji 1200 is a bit far fetched to make a game phone", but now MediaTek is no longer the pioneer of "a P10 forever", and its daily fluency is at the flagship level. Tianji 1200 is actively deployed in MIUI, and it can often open all 8 nuclear fires in a flash. The K40 game enhancement version of MIUI 12.5 is more fluent than the real GT Neo.
In addition, it seems that Tencent does not regard Tianji 1200 as its flagship SoC. Like the real GT Neo, the K40 game enhancement is limited to 40 frames by default in the HDR+limit frame mode of Peace Elite, and still needs to open 90 frames with the PUBG Tool.
System: Factory MIUI 12.5 with layout
MIUI 12.5 has nothing to say. It is a revision to improve fluency. The special feature of K40 game enhancement is that it has a factory pre installed MIUI 12.5 stable version (12.5.1), which is more exclusive than "light". However, there is a small bug in the engineering machine system. When the background is still cleared, the small core will also open all 4 cores from time to time, resulting in occasional heating for no reason (fortunately, the battery is large), waiting for OTA.
MIUI's reputation has declined recently due to a series of reasons, such as bugs and slow update progress. However, there is still no rival in functional richness, and only Samsung with instructions and a bunch of official food plug-ins can compete. ColorOS with Zhuhai engineers and Flyme with "various zeros" threaten the layout of MIUI, but they cannot be ranked first in China.
For the enhanced version of the K40 game, my personal opinion is that it has no Google framework. After manual installation, the 404 Play Store will still flash back, and an unknown jump bug will appear in the APP that requires the framework (it can only be revived after the framework is uninstalled). I hope OTA can fill in the framework.
photograph
The camera part of K40 game enhanced version is actually upgraded:
The main camera of K40 game enhancement version is 6400W OV64B, 0.7 μ m, 1/2 ". The selling point is the" 1 glass+5 plastic "lens, which achieves a larger F1.65 aperture. The specification is stronger than the IM582 (4800W, 1/2") of K40, and weaker than the IMX686 (6400W, 1/1.7 ″, 0.8 μ m) of K40 Pro.
Ultra wide angle is also 8 million pixel IMX355 with a ten thousand year F2.2 aperture. It's a pity that the fun 500W telephoto macro becomes the tactical 200W macro. Compared with the K40 solution, I prefer the K40 game enhancement version.
Here, we will directly compare it with the K40 Pro of higher half order:
Daytime Scenario 1
Daytime scene 1, central zoom in
Daytime Scenario 1
Daytime scene 2, central zoom in
Daytime scenario 3
Daytime scene 3, central zoom in
Daytime scenario 4
Daytime scene 4, central zoom in
Light Scene 1
Light scene 1, central zoom in
Light Scene 2
Light scene 2, central zoom in
Light Scene 3
Light scene 3, central zoom in
Dominant weak light and high pixel mode
Main weak light and high pixel mode, central amplification
2x zoom contrast
2x zoom contrast, central magnification
The photo taking experience of K40 game enhanced version is better than that of K40 Pro, with a slightly higher film completion rate and a slightly faster background synthesis speed.
Although the SoC/CMOS of K40 Game Plus and K40 Pro are different, the style of the two machines is not the same as that of a mobile phone factory.
The K40 game enhancement moderator's photometry is slightly bright, the white balance is unstable, and there is no regularity. OTA has a long way to go. The discrimination is similar to the IMX686 of K40 Pro, but the weak light and 64MP mode are slightly weak, and the "2x zoom" performance is weak by one gear. The overall performance was slightly better than expected, and there should be no suspense about the IMX582 winning K40.
The tactical nature of the super wide angle is not much evaluation, understand all understand.
Endurance&Charging&Heating
Two shoulder keys and 5065mAh battery are inserted in the K40 game enhancement version, but the 3D (8.3mm, 7.8mm for the ordinary K40) and weight (205g, 9g heavier than the ordinary K40) of the body are still in the normal range. This wave can be blown.
The actual endurance performance of K40 game enhancement version is excellent, breaking the endurance record of this year's flagship/flagship. After 30 minutes of "Peace Elite" (HDR high-definition+limit frames+anti aliasing), 30 minutes of 1080P video playback on station B, 30 minutes of short video on microblog, 30 minutes of Wi Fi and 5G surfing, a total of 2.5 hours of endurance testing, the remaining power is 74%.
The room temperature is 24.5 degrees. After 20 minutes of "Peace Elite" HDR HD+limited frames+anti aliasing, the front side can reach a maximum of 43.3 degrees (upper left of the fuselage), and the back side can reach a maximum of 43.7 degrees (opposite the camera matrix). The performance is good.
Eating chicken at 60 frames will do more for Tianji 1200. If you force it, the room temperature will be 24.5 degrees. For 20 minutes, Elite of Peace HDR HD+90 frames+anti aliasing, the front can reach 48.9 degrees, and the back can reach 48 degrees. Although not as enthusiastic as Snapdragon 888, it is also full of heat.
The K40 game enhancement version is a 67W fast charge, which uses two Texas Instruments BQ2597X charge pumps with a peak power of about 55.9W.
1% - 100% charge, 23% charge in 5 minutes, 37% charge in 10 minutes, 50% charge in 15 minutes, 60% charge in 20 minutes, 84% charge in half an hour, 90% charge in 34 minutes and trickle in, 100% display in 48 minutes, trickle in 10 minutes after that, and charge off in 58 minutes.
The same 67W is not as full of blood as Xiaomi 11 Ultra (about 10 minutes slower), nor is it comparable to the flagship 65W of Green Factory. But it's OK, faster than Blue Factory 66W.
The K40 game enhanced version supports QC3+/PD3.0, and the third-party charging head can be about 20W. The fast charging compatibility is also normal.
summary
1999 is a number rich in back stabbing.
After the K40 came out, in addition to the supply problem, the most popular opinions were about the peripheral configurations such as the middle frame, charging, endurance and camera. K40 Game Plus has completed all the parts except wireless charging:
More powerful JBL double lift, double faced gorilla, back AG, NFC improvement (some door cards that could not be solved before can be solved now), 5065mAh battery+67W fast charge;
IP53 (also available in K40 series), infrared, NFC (but the reverse marketing of "pretending to have no NFC and infrared" just a few hours before the press conference is a bit of a problem), slightly enhanced focus, all without problems;
The upper and lower borders of the screen are narrower, but the color accuracy and extreme brightness have fallen back;
If you remove the shoulder key, save some space and cost, and then remove the texture of the back cover, it will be a killer, but it's too bad.
The price of all the improvements is only a slightly heavier and thicker fuselage, and Tianji 1200. At this time, except for Redmi users of heavy games, they all got a back stab.
If the name of the K40 game enhancement version is changed, it should not be positioned as a game phone. It is estimated that the popularity of the promotion will be higher. After all, many users turned away when they heard about game phones. Harmful, who would have thought that he would be stabbed by the back of the game phone.
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