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Midnight Black 18-inch gaming laptop with thin profile

MSI

MSI Stealth A18 AI+ A3XWIG-009US 18" UHD+ 120Hz Mini LED Ryzen AI 9 HX 370 RTX 5080 64 GB

SKU CH-6R31-47CW4

An 18-inch UHD+ 120 Hz Mini LED laptop driven by a 12-core Ryzen AI 9 HX 370 and RTX 5080 with 16 GB GDDR7, 64 GB DDR5 and a 4 TB NVMe SSD

  • Screen size18.0 in (45.7 cm)
  • ProcessorAMD Ryzen AI 300 Series
  • Graphics processorNVIDIA GeForce RTX 5080 Laptop GPU
  • Memory size64 GB
  • Storage drive4 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 Pro

GPU NVIDIA GeForce RTX 5080 Laptop GPU

Memory 64GB

SSD 4 TB

  • 18-inch UHD+ Mini LED at 120 Hz for sharp motion
  • Ryzen AI 9 HX 370 12-core up to 5.1 GHz for heavy workloads
  • RTX 5080 with 16 GB GDDR7 for high-frame-rate gaming
  • 64 GB DDR5 5600 MHz dual-channel for smooth multitasking
  • 4 TB PCIe 4.0 NVMe SSD for fast load times

18-inch UHD+ Mini LED display

The 18-inch UHD+ panel delivers a 3840 by 2400 resolution at 120 Hz using Mini LED technology. It targets creators and gamers who need high pixel density and fast refresh in a single chassis. The system ships with Windows 11 Pro installed.

Gelid GC Extreme thermal compound

HIDevolution applies Gelid GC Extreme on the CPU and GPU to lower core temperatures under load. The Ryzen AI 9 HX 370 12-core processor reaches a 5.1 GHz max turbo frequency within a 0.94-inch thick profile. The RTX 5080 laptop GPU with 16 GB GDDR7 shares the same thermal solution.

4 TB PCIe 4.0 NVMe SSD and 64 GB DDR5

The build includes a 4 TB M.2 PCIe 4.0 x4 NVMe SSD for rapid boot and load times. Memory consists of two 32 GB DDR5 5600 MHz modules running in dual channel. HIDevolution performs full quality control including BIOS updates, stress testing and physical inspection before shipment.

How it compares

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

Price $3,431.99
Pricier than about 83% 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+ A3XWIG-009US
Part numberMS-STEALTHA18AI3009-HID2P
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 drive4 TB M.2 PCIe 4.0 x4 NVMe SSD
SSD storage4 TB
Hard driveNo
Storage configuration4 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 5080 Laptop GPU
Video RAM16 GB
GPU modelNVIDIA® GeForce RTX™ 5080 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 Pro
More details
Pointing deviceMulti Touch
KeyboardSteelSeries per-Key RGB with Anti-Ghost key (99 Key)

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Questions about this item

How is the Gelid GC Extreme thermal compound applied to the Ryzen AI 9 HX 370 and RTX 5080, and what step do people miss?

The builder applies Gelid GC Extreme between the dies and the heatsink during assembly; the step users miss is skipping the burn-in period that lets the compound reach optimal spread and conductivity.

Which components can be upgraded later and what are their current specifications?

The two 32 GB DDR5 5600 MHz modules and the 4 TB M.2 PCIe 4.0 x4 NVMe SSD are socketed and replaceable; the RTX 5080 with 16 GB GDDR7 and the Ryzen processor are soldered.

What thermal limit appears first during sustained loads on the 18 inch UHD+ 120 Hz Mini LED panel?

The GPU temperature ceiling triggers first; the Gelid GC Extreme application and the vapour chamber keep the RTX 5080 below throttle point longer than stock paste would.

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