Lenovo Legion 9i Gen 10 (2025) vs Lenovo Legion Slim 5 Gen 8 (14", 2023)

[ VERDICT ] Winner: Lenovo Legion 9i Gen 10 (2025) (89/100)

Lenovo Legion 9i Gen 10 (2025) leads overall with a score of 89/100 compared to Lenovo Legion Slim 5 Gen 8 (14", 2023) (50/100), offering superior measured performance and technical specifications.

[ WINNER ]
Lenovo Legion 9i Gen 10 (2025)
Lenovo

Lenovo Legion 9i Gen 10 (2025)

89/100
View Full Specs →
Lenovo Legion Slim 5 Gen 8 (14", 2023)
Lenovo

Lenovo Legion Slim 5 Gen 8 (14", 2023)

50/100
View Full Specs →

Benchmark Performance Comparison

Normalized Lab Scores
Benchmark measurements and scores across compared devices
Benchmark Lenovo Legion 9i Gen 10 (2025) Lenovo Legion Slim 5 Gen 8 (14", 2023)
Gaming 92.0 Excellent WINNER 24.0 Poor
NanoReview Score 89.0 Very Good WINNER 50.0 Below Average
Performance 96.0 Excellent WINNER 61.0 Average

Detailed Technical Specifications

Battery

Battery specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Legion Slim 5 Gen 8 (14", 2023)
Battery type Li-Po Li-Po
Charge power 400 W 140 / 170 W
Charging port position Left, Bottom Bottom
Charging via USB (Power Delivery) Yes, 140 W Yes
Fast charging Yes Yes
Replaceable No No
Weight of AC adapter 1247 grams 310 / 503 grams
Full charging time — 0:45 hr

CPU

CPU specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Legion Slim 5 Gen 8 (14", 2023)
Base frequency 2.7 GHz 4.3 GHz
Cores 24 (8P + 16E) 6
Fabrication process 3 nm 4 nm
Integrated GPU Arc Graphics (4-Cores) Radeon 760M
L3 Cache 36 MB 16 MB
Threads 24 12
Turbo frequency 5.4 GHz 5 GHz

Case

Case specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Legion Slim 5 Gen 8 (14", 2023)
Area 1195 cm2(185.2 inches2) 816 cm2(126.5 inches2)
Colors Black Gray
Cooling system Active Active
Dimensions 403 x 296.5 x 23.9-27.95 mm15.87 x 11.67 x 0.94-1.1 inches 327.49 x 249.12 x 17.9-20.79 mm12.89 x 9.81 x 0.7-0.82 inches
Liquid metal Yes No
Material Aluminum Aluminum
Noise level (max. load) 56 dB 52.5 dB
Number of fans 4 2
Opening angle 180° 180°
Screen-to-body ratio ~78.6% ~74.7%
Side bezels 7.7 mm 7.6 mm
Transformer No No
Vapor chamber Yes No
Weight 3.5 kg (7.72 lbs) 1.75 kg (3.86 lbs)

Connectivity

Connectivity specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Legion Slim 5 Gen 8 (14", 2023)
Audio jack (3.5 mm) Yes Yes
Bluetooth v5.4 v5.2
DisplayPort No No
Ethernet (RJ45) Yes No
Fingerprint No Yes
HDMI 1x HDMI 2.1 1x HDMI 2.1
Infrared sensor Yes No
Optical drive No No
Proprietary charging port Yes Yes
SD card reader Yes Yes
Thunderbolt Thunderbolt 5 No
USB Type-C 3x USB 4.0 2x USB 3.2
USB-A 3x USB 3.2 2x USB 3.2
VGA No No
Webcam Above the display Above the display
Webcam resolution 2560 x 1440 1920 x 1080
Wi-Fi standard v7 v6E

Display

Display specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Legion Slim 5 Gen 8 (14", 2023)
Adobe RGB profile 96.8% 96.5%
Aspect ratio 16:10 16:10
Coating Glossy Glossy
Contrast 1200:1 1000000:1
DCI-P3 color gamut 88.9% 100%
HDR support Yes, Dolby Vision Yes, Dolby Vision
PPI 252 ppi 234 ppi
Refresh rate 240 Hz 120 Hz
Resolution 3840 x 2400 pixels 2880 x 1800 pixels
Response time 3 ms 1 ms
Size 18 inches 14.5 inches
Sync technology G-Sync No
Touchscreen No No
Type Mini LED OLED
sRGB color space 100% 100%
Ambient light sensor — No

GPU Benchmarks

GPU Benchmarks specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Legion Slim 5 Gen 8 (14", 2023)
Blender GPU 7717 1113
Solar Bay 123422 22292

Graphics Card

Graphics Card specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Legion Slim 5 Gen 8 (14", 2023)
FLOPS 42 TFLOPS 7.9 TFLOPS
GPU base clock 975 MHz 1530 MHz
GPU performance 42 TFLOPS 7.9 TFLOPS
Memory bus 256 bit 128 bit
Memory size 16 GB 6 GB
Memory speed ~28 Gbps 12 Gbps
Memory type GDDR7 GDDR6
Nvidia Optimus MUX MUX
Raster operations pipelines (ROPs) 96 40
Shading units (cores) 7680 2048
TGP 175 W 95 W
Texture mapping units (TMUs) 240 64
GPU boost clock — 1740 MHz

Input

Input specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Legion Slim 5 Gen 8 (14", 2023)
Backlight Yes Yes
Key travel 1.6 mm 1.5 mm
Keyboard type Island Island
Numpad Yes No
Surface Glass Glass
Windows Precision Yes Yes

RAM

RAM specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Legion Slim 5 Gen 8 (14", 2023)
Channels 2x16 GB 2x8 GB
Clock 5600 MHz 6400 MHz
Max. ram size 192 GB —
Total slots 4 2
Upgradable Yes No

Sound

Sound specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Legion Slim 5 Gen 8 (14", 2023)
Audio chip Realtek ALC3306 Realtek ALC3287
Dolby Atmos No No
Loudness ~79 dB ~84.2 dB
Microphones 2 2
Power 2x2W, 2x2W 2x2W
Speakers 2.2 (2 tweeters and 2 woofers) 2.0

Storage

Storage specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Legion Slim 5 Gen 8 (14", 2023)
Bus PCI-E Gen 5.0 (4x) PCI-E Gen 4.0 (4x)
NVMe Yes Yes
Storage type SSD (M2) SSD (M2)
Total slots 4 2

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