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Midnight black 18 inch gaming laptop, slim profile, Mini LED display

MSI

MSI Stealth A18 AI+ A3XWJG 18" UHD+ 120Hz Mini LED Ryzen AI 9 HX 370 RTX 5090 64GB 8TB gaming

SKU CH-KCKK-AVWPX

An 18-inch UHD+ 120Hz Mini LED laptop with a 12-core Ryzen AI 9 HX 370 up to 5.1 GHz, RTX 5090 24GB GDDR7, 64GB DDR5 and 8TB NVMe SSD

  • ColorMidnight Black
  • Operating SystemWindows 11 Home
  • CPUAMD Ryzen AI 9 HX 370
  • Screen18" UHD+ 120Hz
  • Memory64GB
  • Storage8 TB M.2 PCIe 4.0 x4 NVMe SSD

CPU Name AMD Ryzen AI 9 HX 370

Size|OS|GPU|Memory|SSD|Option

  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 4070TI Laptop GPU|32GB|16 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 4070TI Laptop GPU|32GB|2 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 4070TI Laptop GPU|32GB|4 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 4070TI Laptop GPU|32GB|8 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 4070TI Laptop GPU|64GB|16 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 4070TI Laptop GPU|64GB|2 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 4070TI Laptop GPU|64GB|4 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 4070TI Laptop GPU|64GB|8 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 4070TI Laptop GPU|96GB|16 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 4070TI Laptop GPU|96GB|2 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 4070TI Laptop GPU|96GB|4 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 4070TI Laptop GPU|96GB|8 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|32GB|16 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|32GB|2 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|32GB|4 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|32GB|8 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|64GB|16 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|64GB|2 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|64GB|4 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|64GB|8 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|96GB|16 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|96GB|2 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|96GB|4 TB|QHD+
  • 16.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|96GB|8 TB|QHD+
  • 18.0"|Windows 11 Home|NVIDIA GeForce RTX 5080 Laptop GPU|64GB|2 TB|UHD+
  • 18.0"|Windows 11 Home|NVIDIA GeForce RTX 5080 Laptop GPU|64GB|4 TB|UHD+
  • 18.0"|Windows 11 Home|NVIDIA GeForce RTX 5080 Laptop GPU|64GB|8 TB|UHD+
  • 18.0"|Windows 11 Home|NVIDIA GeForce RTX 5080 Laptop GPU|96GB|2 TB|UHD+
  • 18.0"|Windows 11 Home|NVIDIA GeForce RTX 5080 Laptop GPU|96GB|4 TB|UHD+
  • 18.0"|Windows 11 Home|NVIDIA GeForce RTX 5080 Laptop GPU|96GB|8 TB|UHD+
  • 18.0"|Windows 11 Home|NVIDIA GeForce RTX 5090 Laptop GPU|64GB|2 TB|UHD+
  • 18.0"|Windows 11 Home|NVIDIA GeForce RTX 5090 Laptop GPU|64GB|4 TB|UHD+
  • 18.0"|Windows 11 Home|NVIDIA GeForce RTX 5090 Laptop GPU|64GB|8 TB|UHD+
  • 18.0"|Windows 11 Home|NVIDIA GeForce RTX 5090 Laptop GPU|96GB|2 TB|UHD+
  • 18.0"|Windows 11 Home|NVIDIA GeForce RTX 5090 Laptop GPU|96GB|4 TB|UHD+
  • 18.0"|Windows 11 Home|NVIDIA GeForce RTX 5090 Laptop GPU|96GB|8 TB|UHD+
  • 18.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|64GB|2 TB|UHD+
  • 18.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|64GB|4 TB|UHD+
  • 18.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|64GB|8 TB|UHD+
  • 18.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|96GB|2 TB|UHD+
  • 18.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|96GB|4 TB|UHD+
  • 18.0"|Windows 11 Pro|NVIDIA GeForce RTX 5080 Laptop GPU|96GB|8 TB|UHD+
  • 18.0"|Windows 11 Pro|NVIDIA GeForce RTX 5090 Laptop GPU|64GB|2 TB|UHD+
  • 18.0"|Windows 11 Pro|NVIDIA GeForce RTX 5090 Laptop GPU|64GB|4 TB|UHD+
  • 18.0"|Windows 11 Pro|NVIDIA GeForce RTX 5090 Laptop GPU|64GB|8 TB|UHD+
  • 18.0"|Windows 11 Pro|NVIDIA GeForce RTX 5090 Laptop GPU|96GB|2 TB|UHD+
  • 18.0"|Windows 11 Pro|NVIDIA GeForce RTX 5090 Laptop GPU|96GB|4 TB|UHD+
  • 18.0"|Windows 11 Pro|NVIDIA GeForce RTX 5090 Laptop GPU|96GB|8 TB|UHD+

Struck-through versions exist but are not stocked here.

  • 18-inch UHD+ Mini LED display at 120 Hz for vivid detail
  • Ryzen AI 9 HX 370 12-core processor up to 5.1 GHz for heavy workloads
  • RTX 5090 GPU with 24 GB GDDR7 for high-end graphics power
  • 64 GB DDR5 memory plus 8 TB NVMe SSD for massive capacity
  • Gelid GC Extreme thermal compound keeps temperatures lower under load

Purpose-built workstation

The Stealth A18 AI+ pairs a 12-core Ryzen AI 9 HX 370 processor with an RTX 5090 laptop GPU carrying 24 GB GDDR7. Sixty-four gigabytes of DDR5 5600 memory and an 8 TB NVMe drive give creative professionals and engineers the headroom for large models, timelines and datasets. Windows 11 Home ships pre-installed.

Custom thermal and storage upgrades

HIDevolution applies Gelid GC Extreme thermal compound to both CPU and GPU, lowering peak temperatures and reducing throttling during sustained loads. The 8 TB PCIe 4.0 x4 NVMe SSD is installed and validated before shipment, delivering maximum sequential throughput for project files and virtual machines. Every unit completes burn-in, benchmark, keyboard, touchpad, port and display verification.

Thin chassis with extensive I/O

The Midnight Black magnesium-aluminium body measures 15.74 by 11.41 by 0.94 inches and weighs 6.39 lbs, fitting an 18-inch 3840 x 2400 120 Hz Mini LED panel into a profile suited for desk or travel. A full complement of LAN, WLAN, USB and video connectors supports docks, external storage and multi-monitor rigs without dongles.

Highlights

  • 18-inch UHD+ Mini LED display at 120 Hz for vivid detail
  • Ryzen AI 9 HX 370 12-core processor up to 5.1 GHz for heavy workloads
  • RTX 5090 GPU with 24 GB GDDR7 for high-end graphics power
  • 64 GB DDR5 memory plus 8 TB NVMe SSD for massive capacity
  • Gelid GC Extreme thermal compound keeps temperatures lower under load

Specifications

BrandMSI
SeriesMSI Stealth A18 AI+
ModelStealth A18 AI+ A3XWJG-006US
Part NumberMS-STEALTHA18AI3006-HID3
ColorMidnight Black
Operating SystemWindows 11 Home
CPUAMD Ryzen AI 9 HX 370
Screen18" UHD+ 120Hz
Memory64GB
Storage8 TB M.2 PCIe 4.0 x4 NVMe SSD
Graphics CardNVIDIA® GeForce RTX™ 5090 Laptop GPU
Video Memory24GB
CommunicationLAN and WLAN
Dimensions (W x D x H)15.74" x 11.41" x 0.94"
Weight6.39 lbs
CPU TypeAMD Ryzen AI 300 Series
Processor NameAMD Ryzen AI 9 HX 370
Number of Cores12-core Processor
Turbo FrequencyMax Turbo Frequency 5.1 GHz
CPU L3 Cache36 MB
Screen Size18.0"
TouchscreenNon-Touch Screen
Display TypeUHD+
Resolution3840 x 2400
Refresh Rate120Hz
Display FeaturesMini LED HDR
GPU/VPUNVIDIA GeForce RTX 5090 Laptop GPU
SSD8TB
HDDNo
Storage Spec8 TB M.2 PCIe 4.0 x4 NVMe SSD
Memory Speed5600MHz (Speeds subject to system capability)
Memory Spec2 x 32 GB
Max Memory Supported128GB
LAN2.5GbE Lan
WLAN802.11 be Wi-Fi 7
BluetoothBT 5.4
USB2x Type-A USB3.2 Gen2
Thunderbolt2x Type-C (USB4® / DisplayPort™/ Power Delivery 3.1/ Thunderbolt™ 4 compatible)
HDMI1x HDMI™ 2.1 (8K @ 60Hz / 4K @ 120Hz)
Audio Ports1x Mic-in/Headphone-out Combo Jack
TouchpadMulti Touch
KeyboardSteelSeries per-Key RGB with Anti-Ghost key (99 Key)
WebcamIR FHD w/shutter
Card ReaderSD Express Card Reader
StyleStandard
TypeGaming
UsageConsumer
AC Adapter/Charger280W
Battery4 cell (90Whr) Li-Ion

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Will the 64 GB DDR5 5600 MHz memory or the 8 TB NVMe SSD need replacement down the line?

The 64 GB DDR5 5600 MHz memory is soldered and not user-replaceable; the 8 TB NVMe SSD occupies an M.2 slot and can be swapped later if capacity or speed demands change.

What limit appears first when the Ryzen AI 9 HX 370 and RTX 5090 run sustained loads?

The 12-core CPU at 5.1 GHz turbo and 24 GB GDDR7 GPU share a compact vapor-chamber cooler, so thermal headroom typically caps performance before power delivery does.

How loud and hot does the 18-inch Mini LED chassis get during all-day use?

Gelid GC Extreme paste on both dies keeps surface temperatures lower than stock, and fan noise stays in the mid-40 dB range under continuous gaming loads.

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