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Realme X7 Pro Ultra vs Xiaomi Redmi K40

What X7 Pro Ultra does better (7) and where Redmi K40 wins (4) — every spec side by side.

Realme X7 Pro Ultra
Realme · 2021X7 Pro Ultra
7.8Score
7 advantages≈ $330
Higher score
vs
Xiaomi Redmi K40
Xiaomi · 2021Redmi K40
7.8Score
4 advantages≈ $300
7.4Display7.9
8.1Camera6.7
5.2Battery4.2
7.9Features8.7
Dimensions

Size comparison

X7 Pro UltraRedmi K40
73.4 × 159.97.876.4 × 163.77.8
X7 Pro UltraRedmi K40Difference
Height159.9 mm163.7 mm−3.8 mm
Width73.4 mm76.4 mm−3 mm
Thickness7.8 mm7.8 mm=
Weight170 g196 g−26 g

Drawn to the same scale from the official dimensions (front and side).

Why is X7 Pro Ultra better than Redmi K40?

  1. Wired charging65 W vs 33 W+97%
  2. Main camera64 MP vs 48 MP+33%
  3. 4K video frame rate60 fps vs 30 fps2×
  4. Weight170 g vs 196 g+15%
  5. Selfie camera32 MP vs 20 MP+60%
  6. Charged in 30 min86% vs 58%+48%
  7. Screen-to-body ratio88.3% vs 85.9%+3%

Why is Redmi K40 better than X7 Pro Ultra?

  1. Stereo speakersNo · X7 Pro Ultra: Yes
  2. Refresh rate90 Hz vs 120 Hz+33%
  3. CPU frequency2.6 GHz vs 3.2 GHz+23%
  4. Peak brightness1,200 nits vs 1,300 nits+8%
Specifications

Side by side

Xiaomi Redmi K40Xiaomi Redmi K40≈ $3007.8
Design
Weight170 g196 g
Thickness7.8 mm7.8 mm
Height159.9 mm163.7 mm
Width73.4 mm76.4 mm
Glass protectionCorning Gorilla Glass 5Corning Gorilla Glass 5
ColoursBlack, AuroraBlack, White, Aurora
Display
Screen size6.6″6.7″
PanelSuper AMOLEDSuper AMOLED
OLED panelYesYes
Resolution (width)1,080 px1,080 px
Resolution (height)2,400 px2,400 px
Pixel density402 ppi395 ppi
Refresh rate90 Hz120 Hz
Peak brightness1,200 nits1,300 nits
Screen-to-body ratio88.3%85.9%
HDR—Yes
Performance
ChipsetMediatek Dimensity 1000+Qualcomm SM8250-AC Snapdragon 870 5G
Chip makerMediaTekQualcomm
Process7 nm7 nm
CPU cores88
CPU frequency2.6 GHz3.2 GHz
GPUMali-G77 MC9Adreno 650
Memory
RAM12 GB12 GB
Storage (max)256 GB256 GB
Storage (base)128 GB128 GB
Storage type—UFS 3.1
Memory card slotNoNo
Camera
Main camera64 MP48 MP
Main camera aperturef/1.8f/1.8
Main sensor size1/2.0"1/2.0"
Rear cameras22
Optical stabilisationNoNo
Ultra-wide cameraYesYes
Telephoto cameraNoNo
Max video4K4K
4K video frame rate60 fps30 fps
Selfie camera32 MP20 MP
4K selfie videoNoNo
Battery
Battery capacity4,500 mAh4,520 mAh
Battery type—Li-Po
Wired charging65 W33 W
Charged in 30 min86%58%
Wireless chargingNoNo
Connectivity
5GYesYes
eSIMNoNo
Dual SIMYesYes
Wi-Fi standardWi-Fi 6Wi-Fi 6
Bluetooth5.15.1
NFCYesYes
USBUSB Type-C 2.0USB Type-C 2.0
USB version22
Dual-band GPSYesYes
Satellite navigationGLONASS, GALILEO, BDS, QZSSGLONASS, GALILEO, BDS, QZSS, NavIC
Features
Stereo speakersNoYes
3.5 mm headphone jackNoNo
Fingerprint sensorSideSide
SensorsFingerprint (side-mounted), accelerometer, gyro, proximity, compassFingerprint (side-mounted), accelerometer, gyro, proximity, compass
Software
OS at launchAndroid 11Android 11
PlatformAndroidAndroid
Interface—MIUI 12
To compare: 0up to 4 models
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