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Small black square mini PC with smooth matte finish

MSI

MSI Cubi NUC AI+ 3MG-018US mini PC, Core Ultra 7 355, 16GB DDR5, 1TB SSD

SKU CH-KXE3-VSKYK MPN Cubi NUC AI+ 3MG-018US

A compact desktop with a Core Ultra 7 355 processor, 16 GB DDR5 memory, 1 TB NVMe storage, Wi‑Fi 7 and Bluetooth 5.4 for home or office use

  • TypeStudent / Home Office
  • Form FactorMini PC
  • AI FeaturesCopilot+ PC
  • UsageConsumer / Home / Personal / Mainstream
  • ColorBlack
  • ProcessorIntel Core Ultra 7 355
  • Copilot+ AI features accelerate daily workflows with Intel Core Ultra 7 355
  • 16GB DDR5 memory handles multitasking across student and home-office apps
  • 1TB PCIe M.2 storage loads projects fast and holds large media libraries
  • Wi-Fi 7 and Bluetooth 5.4 give low-latency wireless for video calls and peripherals
  • Compact 1.48 x 4.71 x 4.54 inch chassis fits tight desk spaces and weighs 1.1 lbs

Compact AI mini PC for home office

The MSI Cubi NUC AI+ 3MG-018US fits a Core Ultra 7 355 processor, 16GB DDR5 memory and a 1TB PCIe M.2 2280 drive into a 1.48 x 4.71 x 4.54 inch chassis. Windows 11 Pro and Copilot+ PC features target everyday productivity and light creative work. Two SODIMM slots allow expansion up to 64GB for heavier multitasking.

Sustained load behaviour

A 120W external supply powers the 12MB L3 cache CPU and Intel Graphics through long document, browser and video sessions. Dual Intel I226-V 2.5G LAN ports and Wi-Fi 7 keep network throughput steady when cloud sync or large file transfers run for hours. The small footprint still dissipates heat without throttling typical office workloads.

Build quality and daily connectivity

The black enclosure weighs 1.1 lbs and offers front USB 3.2 Gen2 Type-A and Type-C for quick peripheral access. Rear I/O adds two Thunderbolt4 Type-C ports with DP 1.4 alt-mode up to 4K 60Hz and 15W power delivery plus two HDMI 2.1 outputs. An external power switch lets users reboot without reaching behind the desk.

Highlights

  • Copilot+ AI features accelerate daily workflows with Intel Core Ultra 7 355
  • 16GB DDR5 memory handles multitasking across student and home-office apps
  • 1TB PCIe M.2 storage loads projects fast and holds large media libraries
  • Wi-Fi 7 and Bluetooth 5.4 give low-latency wireless for video calls and peripherals
  • Compact 1.48 x 4.71 x 4.54 inch chassis fits tight desk spaces and weighs 1.1 lbs

Specifications

BrandMSI
ModelCubi NUC AI+ 3MG-018US
TypeStudent / Home Office
Form FactorMini PC
AI FeaturesCopilot+ PC
UsageConsumer / Home / Personal / Mainstream
ColorBlack
ProcessorIntel Core Ultra 7 355
Memory16GB DDR5 SODIMM
Storage1TB PCIe M.2 2280 M-Key
GraphicsIntel Graphics
Power Supply120W
Operating SystemWindows 11 Pro
CPU TypeIntel Core Ultra 7 (Series 3)
CPU NameIntel Core Ultra 7 355
L3 Cache Per CPU12 MB
GPU/VGA TypeIntel Graphics
Memory Capacity16GB DDR5
Memory Slot (Total)2
Maximum Memory Supported64 GB
SSD1TB
Storage Spec1TB PCIe M.2 2280 M-Key
LAN Speed2 x Intel I226-V (2.5G)
WLAN802.11be Wireless LAN
WiFi GenerationWi-Fi 7
BluetoothBluetooth 5.4
Front USB1 x USB 3.2 Gen2 Type-A (front)
1 x USB 3.2 Gen2 Type-C (front)
Rear USB2 x Thunderbolt4 Type-C (DP 1.4 alt-mode up to 4K@60Hz /PD-out15W) (Rear)
Video Ports2 x HDMI 2.1
Dimensions (H x W x D)1.48" x 4.71" x 4.54"
Weight1.1 lbs.
Shipping weight1.45 kg
Package size220 × 205 × 94 mm

Questions about this item

How much power does the 120W adapter draw when the Core Ultra 7 355 runs all day?

The unit ships with a 120W external power supply; actual draw varies with workload but will not exceed that rating.

Which display cables must I already own to use the two HDMI 2.1 outputs?

You need two HDMI cables; the mini PC provides two HDMI 2.1 ports and no other video connectors.

Will my existing 2.5G Ethernet switch work with the dual Intel I226-V LAN ports?

Yes, each port is a 2.5G Intel I226-V controller, so a 2.5G switch will link at full speed.

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