Xiaomi Redmi K40 vs Poco X3 Pro

Here we compared two smartphones: the 6.67-inch Xiaomi Redmi K40 (with Qualcomm Snapdragon 870 5G) that was released on February 25, 2021, against the Xiaomi Poco X3 Pro, which is powered by Qualcomm Snapdragon 860 and came out 1 month after. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets.

Key differences

An overview of the main advantages of each smartphone
Reasons to consider the Xiaomi Redmi K40
  • Newer Bluetooth version (v5.1)
  • Uses a faster type of memory: LPDDR5 2750 MHz
  • 22% better performance in AnTuTu Benchmark (684K versus 562K)
  • Super AMOLED display (versus competitor's IPS LCD)
  • Supports Dolby Atmos sound technology
  • 40% faster in single-core GeekBench 5 test: 1023 and 729 points
  • Weighs 19 grams less
Reasons to consider the Xiaomi Poco X3 Pro
  • Expandable storage via MicroSD card up to 1024GB
  • Comes with 640 mAh larger battery capacity: 5160 vs 4520 mAh
  • More recent OS version: Android 12 versus 11
  • Includes a 3.5 mm headphone audio jack port

Review

Display
Screen quality, color accuracy, brightness
Performance
CPU/GPU performance in apps and games
Battery
Battery life, charging type and speed
Camera
Photo and video recording quality
Connectivity
Networks, ports, data transmission
NanoReview score
Final comparison evaluation

Value for money

You can enter your local price of these phones (in USD or any other currency) and click on the "Calculate" button to see which one has a better value for money.
Price

Tests and specifications

Comparison table of technical specifications and tests

Display

Type Super AMOLED IPS LCD
Size 6.67 inches 6.67 inches
Resolution 1080 x 2400 pixels 1080 x 2400 pixels
Aspect ratio 20:9 20:9
PPI 395 ppi 395 ppi
Refresh rate 120 Hz 120 Hz
Max rated brightness 500 nits 450 nits
Max rated brightness in HDR 1300 nits 600 nits
HDR support Yes, HDR10+ Yes, HDR10
Screen protection Corning Gorilla Glass 5 Corning Gorilla Glass 6
Screen-to-body ratio 85.9% 84.6%
Display features - DCI-P3
- Always-On Display
- DC Dimming
-
Display tests
RGB color space - 95.1%
PWM - 2404 Hz
Response time - 37.4 ms
Contrast - 995:1
Peak brightness test (auto)
n/a
531 nits
Sources: NotebookCheck [3]

Design and build

Height 163.7 mm (6.44 inches) 165.3 mm (6.51 inches)
Width 76.4 mm (3.01 inches) 76.8 mm (3.02 inches)
Thickness 7.8 mm (0.31 inches) 9.4 mm (0.37 inches)
Weight 196 gramm (6.91 oz) 215 gramm (7.58 oz)
Waterproof IP53 IP53
Rear material Glass Plastic
Frame material Plastic Plastic
Colors White, Black Black, Gold, Blue
Fingerprint scanner Yes, in home button Yes, in home button
Screen-to-body ratio
Redmi K40 +2%
85.9%
84.6%

Performance

Tests of Xiaomi Redmi K40 and Xiaomi Poco X3 Pro in the benchmarks
SoC
Chipset Qualcomm Snapdragon 870 5G Qualcomm Snapdragon 860
Max. clock 3200 MHz 2960 MHz
CPU cores 8 (1 + 3 + 4) 8 (1 + 3 + 4)
Architecture - 4 cores at 1.8 GHz: Kryo 585 Silver (Cortex-A55)
- 3 cores at 2.42 GHz: Kryo 585 Gold (Cortex-A77)
- 1 core at 3.2 GHz: Kryo 585 Prime (Cortex-A77)
- 4 cores at 1.8 GHz: Cortex-A55 (Kryo 485 Silver)
- 3 cores at 2.42 GHz: Cortex-A76 (Kryo 485 Gold)
- 1 core at 2.96 GHz: Cortex-A76 (Kryo 485 Prime)
L3 cache 4 MB 2 MB
Lithography process 7 nanometers 7 nanometers
Graphics Adreno 650 Adreno 640
GPU clock 675 MHz 675 MHz
FLOPS ~1372 GFLOPS ~1037 GFLOPS
Memory
RAM size 6, 8, 12 GB 6, 8 GB
Memory type LPDDR5 LPDDR4X
Memory clock 2750 MHz 2133 MHz
Channels 4 2
Storage
Storage size 128, 256 GB 128, 256 GB
Storage type UFS 3.1 UFS 3.1
Memory card No MicroSD
Memory card max. size - Up to 1024 GB

Benchmarks

Geekbench 5 (Single-Core)
Redmi K40 +40%
1023
Geekbench 5 (Multi-Core)
Redmi K40 +36%
3488
AnTuTu Benchmark 9
Redmi K40 +22%
684842
562441
CPU 189456 144978
GPU 245190 206674
Memory 105041 95042
UX 151172 119816
Total score 684842 562441
3DMark Wild Life Performance
Redmi K40 +23%
4261
Stability 90% 98%
Graphics test 25 FPS 20 FPS
Graphics score 4261 3456
PCMark 3.0 score 12170 10741
Sources: 3DMark [3], [4]

Software

Operating system Android 11 Android 11 (Can be upgraded to Android 12)
ROM MIUI 12.5 Enhanced MIUI 13
OS size - 13 GB

Battery

Specifications
Capacity 4520 mAh 5160 mAh
Charge power 33 W 33 W
Battery type Li-Po Li-Po
Replaceable No No
Wireless charging No No
Reverse charging No No
Fast charging Yes (70% in 30 min) Yes (55% in 30 min)
Full charging time 0:52 hr 1:15 hr
Battery life tests
Web browsing - 12:01 hr
Watching video - 10:33 hr
Gaming - 05:25 hr
Standby - 119 hr
General battery life
n/a
32:10 hr

Camera

Specs and camera test of smartphones
Main camera
Matrix 48 megapixels 48 megapixels
Image resolution 8000 x 6000 8000 x 6000
Zoom Digital Digital
Flash LED Dual LED
Stabilization Digital Digital
8K video recording No No
4K video recording Up to 30FPS Up to 30FPS
1080p video recording Up to 60FPS Up to 60FPS
Slow motion 960 FPS (720p) 960 FPS (1080p)
Angle of widest lens 119° 119°
Lenses 3 (48 MP + 8 MP + 5 MP) 4 (48 MP + 8 MP + 2 MP + 2 MP)
Wide (main) lens - 48 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2.0" (CMOS)
- Phase autofocus
- 48 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2.0", Sony IMX582 (Exmor-RS CMOS)
- Phase autofocus
Ultra-wide lens - 8 MP
- Aperture: f/2.2
- Pixel size: 1.12 micron
- Sensor: 1/4.0" (CMOS)
- 8 MP
- Aperture: f/2.2
- Pixel size: 1.12 micron
Macro lens - 5 MP
- Aperture: f/2.4
- Focal length: 50 mm
- Pixel size: 1.12 micron
- Sensor: 1/5.0" (CMOS)
- 2 MP
- Aperture: f/2.4
- Pixel size: 1.75 micron
Depth lens - - 2 MP
- Aperture: f/2.4
- Pixel size: 1.75 micron
Camera features - Bokeh mode
- Pro mode
- Bokeh mode
- Pro mode
Selfie camera
Megapixels 20 megapixels 20 megapixels
Image resolution 4608 x 3456 5480 x 3648
Aperture f/2.5 f/2.2
Focal length 26 mm 25 mm
Pixel size 0.8 microns 0.8 microns
Sensor type CMOS CMOS
Sensor size 1/3.4" 1/3.4"
Video resolution 1080p (Full HD) at 30 FPS 1080p (Full HD) at 30 FPS

Connectivity

Wi-Fi standard Wi-Fi 6E (802.11 a/b/g/n/ac/ax) Wi-Fi 5 (802.11 a/b/g/n/ac)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5.1 5
Bluetooth features LE, HID, A2DP LE, A2DP
USB type USB Type-C USB Type-C
USB version 2 2
USB features - Charging
- USB-Storage mode
- OTG
- Charging
- USB-Storage mode
- USB-Host mode
- OTG
GPS GPS, GLONASS, Beidou, Galileo, NAVIC GPS, GLONASS, Beidou, Galileo
NFC* Yes Yes
Infrared port Yes Yes
Network
Number of SIM* 2 2
Type of SIM card Nano Nano
Multi SIM mode Standby Standby
eSIM support* No No
Hybrid slot No Yes
LTE Cat* 20 20
5G support Yes No

Sound

Speakers Stereo Stereo
Headphone audio jack No Yes
FM radio No Yes
Dolby Atmos Yes No
Speakers test
Max. loudness
n/a
88.3 dB

Other

Category Flagship Mid-range
Announced February 2021 March 2021
Release date March 2021 April 2021
Sensors - Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.

Conclusion

If the display, performance, connectivity, and design are more important to you, then choose the Xiaomi Redmi K40. But if the camera is more of a priority – go for the Xiaomi Poco X3 Pro.

Cast your vote

So, which phone would you choose?
46 (44.2%)
58 (55.8%)
Total votes: 104

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