Specifications
Display
18.00 inch 16:10, 3840 x 2400 pixel 252 PPI, IPS, glossy: yes, 240 Hz
Connections
4 USB 3.1 Gen2, 2 Thunderbolt, USB-C Power Delivery (PD), 1 HDMI, Audio Connections: 3.5mm
Networking
10/100/1000 LAN Card (10/100/1000MBit/s), 802.11 a/b/g/n/ac/ax/be (a/b/g/n = Wi-Fi 4/ac = Wi-Fi 5/ax = Wi-Fi 6/ Wi-Fi 6E 6 GHz be = Wi-Fi 7), Bluetooth 5.4
Size
height x width x depth (in mm): 27.95 x 403 x 296.9 ( = 1.1 x 15.87 x 11.69 in)
Battery
99.9 Wh Lithium-Ion
Operating System
Microsoft Windows 11 Home
Camera
Webcam: IR
Primary Camera: 5 MPix
Additional features
Keyboard: Chiclet, Keyboard Light: yes
Weight
3.5 kg ( = 123.46 oz / 7.72 pounds) ( = 0 oz / 0 pounds)
Price comparison
Reviews for the Lenovo Legion 9 18IAX10
The Fastest Gaming Laptop…sorta
Source: Hardware Canucks 
The fastest gaming laptop we’ve ever tested is here and its the Legion 9i which has a brand new design for 2025. With an RTX 5090 and Intel Ultra 9 275HX, we put this up to some of the best gaming laptops with AMD and Intel CPUs alongside the RTX 4090. Well it turns out that the Legion 9i is amazing in a lot of ways but it falls short in others.
Single Review, online available, Very Long, Date: 05/08/2025
Comment
NVIDIA GeForce RTX 5090 Laptop: The GeForce RTX 5090 Mobile uses the GB203 chip and utilizes 10,496 shaders / CUDA cores of the maximum 10,752 that the chip has. This makes the RTX 5090 Laptop more similar to the RTX 5080 desktop variant (same chip) than the Desktop RTX 5090 with 20,760 cores and higher clock rates.
These graphics cards are able to play the latest and most demanding games in high resolutions and full detail settings with enabled Anti-Aliasing.
» Further information can be found in our Comparison of Mobile Graphics Cards and the corresponding Benchmark List.
Ultra 9 275HX: Mobile high-end CPU for gaming notebooks based on the Arrow Lake architecture. Offers 24 cores consisting of 8 fast performance cores with up to 5.4 GHz and 16 smaller efficiency cores with up to 4.6 GHz clock speed. The CPU can access 40 MB L2 cache and 36 MB L3 cache and is specified with a TDP of 55 watts. The SoC integrates a small dedicated NPU called AI Boost with 13 TOPS (Int8) and optionally supports vPro Essentials.» Further information can be found in our Comparison of Mobile Processsors.
18.00″: This display size is a standard format for desktop replacements (DTR). The DTR laptops are heavier to carry, need more power, but texts are easy to read and high resolutions are no problem. DTR are mainly intended for stationary desk use, where weight and energy hunger don’t matter. In return, you enjoy the advantages of high resolutions (more details, better legibility).» To find out how fine a display is, see our DPI List.
3.5 kg:
A laptop with this weight is comparatively heavy and less designed for mobility than for use at the desk. Therefore, the devices tend to shine less with battery life than with a large screen and higher performance.
Lenovo: Lenovo (“Le” from English legend, novo (Latin) for new) was founded in 1984 as a Chinese computer trading company. As of 2004, the company was the largest laptop manufacturer in China and, after acquiring IBM’s PC division in 2005, the fourth largest in the world. In addition to desktops and notebooks, the company manufactures monitors, projectors, servers, etc, and specializes in developing, manufacturing and marketing consumer electronics, personal computers, software, enterprise solutions and related services.
In 2016, the company ranked first in the world in computer sales. It still held it in 2023 with about 23% global market share. Important product lines are Thinkpad, Legion and Ideapad.
In 2011, it acquired a majority stake in Medion AG, a European computer hardware manufacturer. In 2014, Motorola Mobility was purchased, which gave Lenovo a boost in the smartphone market.
» Further information can be found in our Notebook Purchase Guide.
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Stefan Hinum, 2025-08- 3 (Update: 2025-08- 3)