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. On this page, you will find tests, full specs, strengths, and weaknesses of each of the devices.
Key differences
Reasons to consider the Xiaomi Redmi K40
- Newer Bluetooth version (v5.1)
- Uses a faster type of memory: LPDDR5 2750 MHz
- 24% better performance in AnTuTu Benchmark (695K versus 562K)
- AMOLED display (versus competitor's IPS LCD)
- Supports Dolby Atmos sound technology
- 40% faster in single-core GeekBench 5 test: 1021 and 729 points
- Weighs 19 grams less
Reasons to consider the Xiaomi Poco X3 Pro
- Expandable storage via MicroSD card up to 1024GB
- More recent OS version: Android 13 versus 11
- Comes with 640 mAh larger battery capacity: 5160 vs 4520 mAh
- Includes a 3.5 mm headphone audio jack port
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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
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Tests and specifications
Comparison table of technical specifications and testsDisplay
| Type | 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 |
| Adaptive refresh rate | No | No |
| 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 |
- |
| RGB color space | - | 95.1% |
| PWM | - | 2404 Hz |
| Response time | - | 37.4 ms |
| Contrast | - | 995:1 |
Peak brightness test (auto)
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 g (6.91 oz) | 215 g (7.58 oz) |
| Waterproof | IP53 | IP53 |
| Advanced cooling | Vapor chamber | - |
| 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
Performance
| 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 |
Benchmarks
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)
AnTuTu Benchmark 9
| CPU | 197488 | 147657 |
| GPU | 242243 | 207179 |
| Memory | 106088 | 100644 |
| UX | 150139 | 111058 |
| Total score | 695337 | 562447 |
3DMark Wild Life Performance
| Max surface temperature | - | 44.1 °C |
| Stability | 93% | 97% |
| Graphics test | 25 FPS | 20 FPS |
| Graphics score | 4284 | 3456 |
PCMark 3.0
| Web score | 9662 | 8066 |
| Video editing | 7080 | 6258 |
| Photo editing | 30295 | 21732 |
| Data manipulation | 9303 | 8689 |
| Writing score | 14909 | 12293 |
Memory
| RAM size | 6, 8, 12 GB | 6, 8 GB |
| Memory type | LPDDR5 | LPDDR4X |
| Memory clock | 2750 MHz | 2133 MHz |
| Channels | 4 | 2 |
| 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 |
Software
| Operating system | Android 11 | Android 11 (Can be upgraded to Android 13) |
| ROM | MIUI 12.5 Enhanced | MIUI 14 |
| OS size | - | 13 GB |
Battery
| 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 |
| Web browsing | - | 11:51 hr |
| Watching video | - | 10:33 hr |
| Gaming | - | 05:14 hr |
| Standby | - | 119 hr |
General battery life
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 |
| 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 |
| 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
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, design, and sound are more important to you, then choose the Xiaomi Redmi K40. But if the software and camera are more of a priority – go for the Xiaomi Poco X3 Pro.
Cast your vote
Total votes: 117