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Midnight Black 18 inch gaming laptop closed lid matte finish

MSI

MSI Stealth A18 AI+ A3XWJG-006US 18" UHD+ 120Hz Mini LED Ryzen AI 9 HX 370 RTX 5090 64 GB

SKU CH-XPXS-V3YKK

An 18-inch UHD+ 120Hz Mini LED gaming laptop with a 12-core Ryzen AI 9 HX 370 processor, RTX 5090 graphics with 24 GB GDDR7, 64 GB DDR5 memory and a 2 TB PCIe 4.0 NVMe SSD

  • Screen size18.0 in (45.7 cm)
  • ProcessorAMD Ryzen AI 300 Series
  • Graphics processorNVIDIA GeForce RTX 5090 Laptop GPU
  • Memory size64 GB
  • Storage drive2 TB M.2 PCIe 4.0 x4 NVMe SSD
  • Display resolution3840 × 2400

CPU Name AMD Ryzen AI 9 HX 370

Size 18.0"

Operating System Windows 11 Home

GPU NVIDIA GeForce RTX 5090 Laptop GPU

Memory 64GB

SSD 2 TB

  • 12-core Ryzen AI 9 HX 370 reaches 5.1 GHz turbo for heavy multitasking
  • RTX 5090 with 24 GB GDDR7 drives 4K gaming and AI workloads
  • 18-inch UHD+ Mini LED at 120 Hz delivers sharp motion and deep contrast
  • 64 GB DDR5 5600 dual-channel memory handles large datasets without swapping
  • 2 TB PCIe 4.0 NVMe SSD cuts boot and load times for games and apps

18-inch UHD+ Mini LED gaming laptop

The MSI Stealth A18 AI+ A3XWJG-006US pairs an 18-inch UHD+ 120Hz Mini LED panel with an AMD Ryzen AI 9 HX 370 12-core processor and NVIDIA RTX 5090 laptop GPU equipped with 24 GB GDDR7 memory. The configuration targets creators and gamers who need a large high-resolution workspace and desktop-class graphics performance in a portable chassis.

Sustained load behaviour with Gelid GC Extreme

HIDevolution applies Gelid GC Extreme thermal interface material to both the CPU and GPU during assembly to improve heat transfer away from the dies. The upgrade is intended to keep temperatures lower during extended rendering or gaming sessions, reducing the likelihood of thermal throttling when the 12-core processor runs at its 5.1 GHz max turbo frequency alongside the RTX 5090 under continuous load.

Build quality and daily connectivity

The Midnight Black chassis measures 15.74 by 11.41 by 0.94 inches and weighs 6.39 lbs, providing a rigid platform for the 18-inch display and internal component layout. A 2 TB M.2 PCIe 4.0 x4 NVMe SSD and 64 GB of DDR5 5600 MHz memory in dual-channel configuration deliver fast boot times and ample bandwidth for multitasking, while integrated LAN and WLAN handle wired and wireless networking without additional adapters.

How it compares

Measured against everything we stock in Gaming Laptop Computers, at today’s prices. Recalculated every night.

Price $3,285.99
Pricier than about 82% of the 5,382 comparable items (median $1,978.99).
Screen size 18.0 in (45.7 cm)
Higher than about 90% of the 5,361 comparable items (median 16 in).
Refresh frequency 120 Hz
Lower than about 90% of the 2,443 comparable items (median 165 Hz).

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Specifications

Product
Brand nameMSI
Product lineMSI Stealth A18 AI+
Model nameStealth A18 AI+ A3XWJG-006US
Part numberMS-STEALTHA18AI3006-HID1
Product colorMidnight Black
Design styleStandard
Product typeGaming
Recommended useConsumer
Processor
ProcessorAMD Ryzen AI 9 HX 370
Processor modelAMD Ryzen AI 9 HX 370
CPU cores12-core Processor
Turbo clock speed5.1 GHz
L3 cache size36 MB
Memory
Memory size64 GB
RAM type and speed5600 MHz (Speeds subject to system capability)
Memory configuration2 × 32 GB
Maximum supported memory128 GB
Storage
Storage drive2 TB M.2 PCIe 4.0 x4 NVMe SSD
SSD storage2 TB
Hard driveNo
Storage configuration2 TB M.2 PCIe 4.0 x4 NVMe SSD
Display
Screen size18.0 in (45.7 cm)
Display resolution3840 × 2400
Refresh frequency120 Hz
Touch inputNon-Touch Screen
Display18 in UHD+ 120 Hz
Display formatUHD+
Screen featuresMini LED HDR
Graphics
Graphics processorNVIDIA GeForce RTX 5090 Laptop GPU
Video RAM24 GB
GPU modelNVIDIA® GeForce RTX™ 5090 Laptop GPU
Audio & video
Web cameraIR FHD w/shutter
Connectivity
NetworkingLAN and WLAN
LAN connection2.5GbE Lan
Wi-Fi802.11 be Wi-Fi 7
Bluetooth supportBT 5.4
Ports & slots
USB ports2x Type-A USB3.2 Gen2
Thunderbolt ports2x Type-C (USB4® / DisplayPort™/ Power Delivery 3.1/ Thunderbolt™ 4 compatible)
HDMI ports1x HDMI™ 2.1 (8K @ 60 Hz / 4K @ 120 Hz)
Audio jacks1x Mic-in/Headphone-out Combo Jack
Memory card readerSD Express Card Reader
Power
Power adapter280 W
Battery pack4 cell (90Whr) Li-Ion
Size & build
Overall dimensions15.74 in × 11.41 in × 0.94 in
Product weight6.39 lb (2.9 kg)
Software
Operating systemWindows 11 Home
More details
Pointing deviceMulti Touch
KeyboardSteelSeries per-Key RGB with Anti-Ghost key (99 Key)

Other versions of this model

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Questions about this item

How loud are the fans when the Ryzen AI 9 HX 370 and RTX 5090 run at full load all day?

Gelid GC Extreme thermal compound on the CPU and GPU lowers temperatures to reduce throttling during sustained workloads. The build includes burn-in stress testing for thermal performance.

Which external display cables or docks must I already own to drive the 3840 x 2400 Mini LED panel at 120 Hz?

The 18 inch UHD+ Mini LED display is built into the chassis. No external cables or docks are required to run the internal screen at its native 120 Hz refresh rate.

Will my existing DDR5 5600 SO-DIMMs work alongside the factory 64 GB kit if I add more memory later?

The system ships with 64 GB (2 x 32 GB) DDR5 5600 dual-channel memory filling both slots. There are no free slots for additional modules.

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