Lenovo Legion 9i Gen 10 (2025) vs Lenovo Slim Pro 9i Gen 8 (16”)

[ 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 Slim Pro 9i Gen 8 (16”) (65/100), 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 Slim Pro 9i Gen 8 (16”)
Lenovo

Lenovo Slim Pro 9i Gen 8 (16”)

65/100
View Full Specs →

Benchmark Performance Comparison

Normalized Lab Scores
Benchmark measurements and scores across compared devices
Benchmark Lenovo Legion 9i Gen 10 (2025) Lenovo Slim Pro 9i Gen 8 (16”)
Gaming 92.0 Excellent WINNER 33.0 Poor
NanoReview Score 89.0 Very Good WINNER 65.0 Average
Performance 96.0 Excellent WINNER 64.0 Average

Detailed Technical Specifications

Battery

Battery specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Slim Pro 9i Gen 8 (16”)
Battery type Li-Po Li-Po
Charge power 400 W 100 / 140 / 170 W
Charging port position Left, Bottom Left
Charging via USB (Power Delivery) Yes, 140 W Yes
Fast charging Yes Yes
Replaceable No No
Weight of AC adapter 1247 grams 522 grams
Full charging time — 1:30 hr

CPU

CPU specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Slim Pro 9i Gen 8 (16”)
Base frequency 2.7 GHz 2.4 GHz
Cores 24 (8P + 16E) 14 (6P + 8E)
Fabrication process 3 nm 10 nm
Integrated GPU Arc Graphics (4-Cores) Intel Iris Xe Graphics (96EU)
L3 Cache 36 MB 24 MB
Threads 24 20
Turbo frequency 5.4 GHz 5 GHz

Case

Case specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Slim Pro 9i Gen 8 (16”)
Area 1195 cm2(185.2 inches2) 887 cm2(137.5 inches2)
Colors Black Gray, Blue, Green
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 362 x 245 x 18.16 mm14.25 x 9.65 x 0.71 inches
Liquid metal Yes No
Material Aluminum Aluminum
Noise level (max. load) 56 dB 53.2 dB
Number of fans 4 2
Opening angle 180° 150°
Screen-to-body ratio ~78.6% ~83.7%
Side bezels 7.7 mm 8.7 mm
Transformer No No
Vapor chamber Yes No
Weight 3.5 kg (7.72 lbs) 2.06 kg (4.54 lbs)

Connectivity

Connectivity specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Slim Pro 9i Gen 8 (16”)
Audio jack (3.5 mm) Yes Yes
Bluetooth v5.4 v5.2
DisplayPort No No
Ethernet (RJ45) Yes No
Fingerprint No No
HDMI 1x HDMI 2.1 1x HDMI 2.1
Infrared sensor Yes Yes
Optical drive No No
Proprietary charging port Yes Yes
SD card reader Yes Yes
Thunderbolt Thunderbolt 5 Thunderbolt 4
USB Type-C 3x USB 4.0 1x 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 2560 x 1440
Wi-Fi standard v7 v6E

Display

Display specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Slim Pro 9i Gen 8 (16”)
Adobe RGB profile 96.8% —
Aspect ratio 16:10 16:10
Coating Glossy Glossy
Contrast 1200:1 —
DCI-P3 color gamut 88.9% 100%
HDR support Yes, Dolby Vision Yes, Dolby Vision
PPI 252 ppi 236 ppi
Refresh rate 240 Hz 165 Hz
Resolution 3840 x 2400 pixels 3200 x 2000 pixels
Response time 3 ms —
Size 18 inches 16 inches
Sync technology G-Sync No
Touchscreen No No
Type Mini LED IPS LCD
sRGB color space 100% 100%
Ambient light sensor — Yes

GPU Benchmarks

GPU Benchmarks specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Slim Pro 9i Gen 8 (16”)
Blender GPU 7717 2393
Solar Bay 123422 34370

Graphics Card

Graphics Card specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Slim Pro 9i Gen 8 (16”)
FLOPS 42 TFLOPS 11.7 TFLOPS
GPU base clock 975 MHz 1905 MHz
GPU performance 42 TFLOPS 11.7 TFLOPS
Memory bus 256 bit 96 bit
Memory size 16 GB 6 GB
Memory speed ~28 Gbps ~16 Gbps
Memory type GDDR7 GDDR6
Nvidia Optimus MUX Yes
Raster operations pipelines (ROPs) 96 32
Shading units (cores) 7680 2560
TGP 175 W 100 W
Texture mapping units (TMUs) 240 80
GPU boost clock — 2280 MHz

Input

Input specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Slim Pro 9i Gen 8 (16”)
Backlight Yes Yes
Key travel 1.6 mm 1.5 mm
Keyboard type Island Island
Numpad Yes Yes
Surface Glass Glass
Windows Precision Yes Yes

RAM

RAM specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Slim Pro 9i Gen 8 (16”)
Channels 2x16 GB 2x8 GB
Clock 5600 MHz 6400 MHz
Max. ram size 192 GB —
Total slots 4 1
Upgradable Yes No

Sound

Sound specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Slim Pro 9i Gen 8 (16”)
Audio chip Realtek ALC3306 Realtek ALC3306
Dolby Atmos No Yes
Loudness ~79 dB ~79.7 dB
Microphones 2 2
Power 2x2W, 2x2W 6x2W
Speakers 2.2 (2 tweeters and 2 woofers) 2.4 (2 tweeters and 4 woofers)

Storage

Storage specifications comparison
Specification Lenovo Legion 9i Gen 10 (2025) Lenovo Slim Pro 9i Gen 8 (16”)
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 1

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