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Midnight Black 18 inch gaming laptop closed showing slim profile

MSI

MSI Stealth A18 AI+ A3XWIG 18" UHD+ 120Hz Mini LED Ryzen AI 9 HX 370 RTX 5080 96 GB DDR5 4 TB

SKU CH-RTV4-CC612

18-inch UHD+ 120Hz Mini LED gaming laptop with Ryzen AI 9 HX 370 12-core processor, RTX 5080 16 GB GDDR7 graphics, 96 GB DDR5 memory and 4 TB NVMe SSD

  • Screen size18.0 in (45.7 cm)
  • ProcessorAMD Ryzen AI 300 Series
  • Graphics processorNVIDIA GeForce RTX 5080 Laptop GPU
  • Memory size96 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 Home

GPU NVIDIA GeForce RTX 5080 Laptop GPU

Memory 96GB

SSD 4 TB

  • 12-core Ryzen AI 9 HX 370 reaches 5.1 GHz turbo for heavy workloads
  • 18-inch UHD+ Mini LED at 120 Hz delivers sharp motion detail
  • RTX 5080 with 16 GB GDDR7 drives high-frame-rate gaming and rendering
  • 96 GB DDR5 5600 MHz dual-channel memory handles large datasets smoothly
  • 4 TB PCIe 4.0 NVMe SSD provides vast space and fast load times

18-inch UHD+ Mini LED gaming laptop

The MSI Stealth A18 AI+ A3XWIG pairs an 18-inch UHD+ 120Hz Mini LED panel with a 12-core Ryzen AI 9 HX 370 processor and an RTX 5080 GPU carrying 16 GB of GDDR7 memory. It ships with 96 GB of DDR5 memory and a 4 TB PCIe 4.0 x4 NVMe SSD. The configuration targets creators and gamers who need high resolution and fast refresh rates in a single chassis.

Thermals and acoustics with Gelid GC Extreme

HIDevolution applies Gelid GC Extreme thermal interface material to the CPU and GPU to lower operating temperatures under load. The upgrade aims to reduce throttling during sustained compute or graphics work while keeping fan noise in check. Power draw scales with the 5.1 GHz maximum turbo frequency and the discrete RTX 5080, so the cooling solution is tuned for that envelope.

Midnight Black aluminium chassis and port layout

The Midnight Black finish covers a frame measuring 15.74 by 11.41 by 0.94 inches and weighing 6.39 lbs. The thin profile and weight distribution suit desk use with occasional transport. Standard LAN and WLAN interfaces handle wired and wireless connectivity without requiring proprietary docks or adapters.

How it compares

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

Price $4,826.99
Pricier than about 91% 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-HID5
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 size96 GB
RAM type and speed5600 MHz (Speeds subject to system capability)
Memory configuration2 × 48 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 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 is the Gelid GC Extreme thermal compound applied to the Ryzen AI 9 HX 370 and RTX 5080, and what step is often missed?

The compound is pre-applied by the builder during assembly; the step users miss is not disturbing the paste when upgrading the 96 GB DDR5 modules or 4 TB NVMe SSD, which would require a full re-paste to restore the thermal path.

What maintenance or replacement will the Gelid GC Extreme thermal interface need over the laptop's life?

The Gelid GC Extreme compound does not require scheduled replacement; it should only be refreshed if the chassis is opened for a memory or storage upgrade, or if sustained temperatures rise noticeably above baseline after several years of heavy use.

Which limit appears first during sustained load on the 12-core Ryzen AI 9 HX 370 and RTX 5080 with 16 GB GDDR7?

The 120 Hz Mini LED panel caps the visible frame rate at 120 FPS, so the GPU often reaches this display ceiling before the Gelid GC Extreme thermal solution hits its temperature threshold in extended sessions.

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