Lenovo IdeaPad Flex 5 (15”) vs 3i 15” (2021, Intel)

You can select specific configurations for the laptops to get a more accurate comparative review
Battery 52.5 Wh
CPU
RAM
Storage

Review

Evaluation of Lenovo IdeaPad Flex 5 (15”) and 3i 15” (2021, Intel) important characteristics
Performance
System and application performance
Gaming
Performance in popular 3D games
Display
Viewing angle, color accuracy, brightness
Battery Life
Potential battery life in light and average use
Connectivity
Ports, webcam and other interfaces
Case
Design, materials, durability and usability

Key Differences

What are the key differences between the notebooks
Advantages of the Lenovo IdeaPad Flex 5 (15”)
  • Features a much bigger (~38%) battery – 52.5 against 38 watt-hours
  • Display has support for touch input
Advantages of the Lenovo IdeaPad 3i 15” (2021, Intel)
  • Slightly easier to carry: weighs 100 grams less (around 0.22 lbs)
  • Provides 20% higher max. screen brightness: 300 vs 250 nits
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Tests and Specifications

Comparison table of test results and technical specs

Case

Weight 1.8 kg (3.97 lbs) 1.7 kg (3.75 lbs)
Dimensions 357.6 x 237.9 x 17.9-20.3 mm
14.08 x 9.37 x 0.7-0.8 inches
359.2 x 236.5 x 19.9 mm
14.14 x 9.31 x 0.78 inches
Area 851 cm2 (131.9 inches2) 850 cm2 (131.6 inches2)
Screen-to-body ratio ~78.9% ~79%
Side bezels 6.1 mm 6.9 mm
Colors Gray Gray, Blue, Yellow
Transformer Yes No
Opening angle 360° 180°
Size comparison
Cooling solution
Cooling system Active Active
Vapor chamber No No
Number of fans - 2

Display

Size 15.6 inches 15.6 inches
Type IPS LCD TFT VA
Refresh rate 60 Hz 60 Hz
PPI 141 ppi 141 ppi
Aspect ratio 16:9 16:9
Resolution 1920 x 1080 pixels 1920 x 1080 pixels
HDR support No No
Touchscreen Yes No
Coating Glossy Matte
Display tests
sRGB color space 60% -
Max. brightness

Battery

Capacity
Full charging time 2:00 hr -
Battery type Li-Po Li-Ion
Replaceable No No
Fast charging Yes Yes
USB Power Delivery Yes No
Charging port position Left Left
Charge power 65 W 65 W

CPU

CPU name
Base frequency 1.2 GHz 1.7-3.0 GHz
Turbo frequency 3.4 GHz 4.1 GHz
Cores 2 2
Threads 4 4
L3 Cache 4 MB 6 MB
Integrated GPU Intel UHD Graphics G1 Intel Iris Xe Graphics G4
Fabrication process 10 nm 10 nm

Benchmarks

Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)
Cinebench R23 (Single-Core)
Cinebench R23 (Multi-Core)

Graphics Card

GPU name
Type Dedicated Dedicated
Fabrication process 12 nm 12 nm
FLOPS 2.822 TFLOPS 2.822 TFLOPS
Memory size 2 GB 2 GB
Memory type GDDR6 GDDR6
Memory bus 64 bit 64 bit
Memory speed ~8-10 Gbps ~8-10 Gbps
Shading units (cores) 896 896
Texture mapping units (TMUs) 56 56
Raster operations pipelines (ROPs) 32 32
GPU performance

RAM

RAM size
Channels 1x4 GB 1x4 GB
Clock 3200 MHz 3200 MHz
Type DDR4 DDR4
Upgradable Yes Yes
Total slots 2 2
Max. ram size 16 GB 16 GB

Storage

Storage size
Bus PCI-E Gen 3.0 (4x) PCI-E Gen 3.0 (4x)
Storage type SSD (M2) SSD (M2)
Channels 1x256 GB 1x256 GB
Upgradable Yes Yes
Total slots 1 1
NVMe Yes Yes

Sound

Speakers 2.0 2.0
Power 2x2W 2x1.5W
Dolby Atmos Yes Yes
Microphones 2 2

Connectivity

Wi-Fi standard v6 v6
Bluetooth v5 v5.1
Fingerprint Yes No
Optical drive No No
Webcam Above the display Above the display
Webcam resolution 1280 x 720 1280 x 720
Ports
USB-A 2x USB 3.2 2x USB 3.2
USB Type-C 1x USB 3.2 1x USB 3.2
Thunderbolt No No
HDMI 1x HDMI 1.4 1x HDMI 2.0
DisplayPort No No
VGA No No
Audio jack (3.5 mm) Yes Yes
Ethernet (RJ45) No No
SD card reader Yes Yes
Proprietary charging port Yes Yes

Input

Keyboard
Keyboard type Island Island
Numpad No Yes
Backlight Yes Yes
Touchpad
Surface Plastic Plastic
Windows Precision Yes Yes
*Disclaimer! Ports, speakers, display, and other specifications can be different depending on the laptop’s particular configuration or region.

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