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Small black mini PC with a compact square chassis and smooth matte finish

MSI

MSI Cubi NUC AI+ 3MG-020US mini PC, Core Ultra 7 355, 16GB DDR5, 1TB NVMe, WiFi 7, Bluetooth 5.4

SKU CH-VZ8B-KXK9F MPN Cubi NUC AI+ 3MG-020US

Compact mini PC with Intel Core Ultra 7 355, 16GB DDR5, 1TB NVMe, WiFi 7 and Bluetooth 5.4 for home and office use

  • ProcessorIntel Core Ultra 7 (Series 3)
  • Memory size16 GB DDR5 SODIMM
  • Storage drive1 TB PCIe M.2 2280 M-Key
  • GraphicsIntel Graphics
  • CPUIntel Core Ultra 7 355
  • Wi-Fi standardWi-Fi 7
  • Intel Core Ultra 7 355 delivers responsive AI-ready performance
  • 16GB DDR5 memory handles multitasking and demanding workloads smoothly
  • 1TB PCIe M.2 2280 storage provides fast capacity for files and apps
  • Wi-Fi 7 and Bluetooth 5.4 enable high-speed wireless connectivity
  • Compact 1.48" x 4.71" x 4.54" design fits tight spaces easily

Compact AI-Ready Mini PC

The MSI Cubi NUC AI+ 3MG-020US is a 1.1 lb black mini PC powered by an Intel Core Ultra 7 355 processor with 12 MB L3 cache. It ships with 16 GB DDR5 SODIMM memory across two slots, a 1 TB PCIe M.2 2280 NVMe drive, and Windows 11 Home. A 120 W external supply powers the Intel Graphics engine.

Suited for Copilot Workloads, Not Heavy Gaming

This system targets students and home-office users who want on-device Copilot+ AI features, dual 2.5 GbE Intel I226-V LAN, Wi-Fi 7, and Bluetooth 5.4 in a 1.48 x 4.71 x 4.54 inch chassis. Buyers needing discrete graphics performance, more than 64 GB RAM, or additional internal drive bays should consider a larger desktop platform.

Two HDMI 2.1 Video Outputs

Front I/O provides one USB 3.2 Gen2 Type-A and one Type-C port. The rear adds two USB 3.2 Gen2 Type-C ports with DisplayPort 1.4 alt-mode up to 4K at 60 Hz and 15 W power delivery, plus two HDMI 2.1 connectors for multi-monitor setups.

How it compares

Measured against everything we stock in Small Form Factor & Mini PCs, at today’s prices. Recalculated every night.

Price $1,075.99
Pricier than about 86% of the 132 comparable items (median $581.99).
Memory size 16 GB DDR5 SODIMM
Typical for this category: the median of 102 items is 16 GB.
RAM capacity 16 GB DDR5
Typical for this category: the median of 123 items is 16 GB.

Specifications

Product
Brand nameMSI
Model nameCubi NUC AI+ 3MG-020US
Product typeStudent / Home Office
Recommended useConsumer / Home / Personal / Mainstream
Product colorBlack
Processor
ProcessorIntel Core Ultra 7 (Series 3)
CPUIntel Core Ultra 7 355
CPU modelIntel Core Ultra 7 355
L3 cache per CPU12 MB
Memory
Memory size16 GB DDR5 SODIMM
RAM capacity16 GB DDR5
Total memory slots2
Max supported RAM64 GB
Storage
Storage drive1 TB PCIe M.2 2280 M-Key
SSD storage1 TB
Storage configuration1 TB PCIe M.2 2280 M-Key
Graphics
GraphicsIntel Graphics
GPUIntel Graphics
Connectivity
Wi-Fi standardWi-Fi 7
Network speed2 x Intel I226-V (2.5G)
Wi-Fi802.11be Wireless LAN
Bluetooth support5.4
Ports & slots
Front USB ports1 x USB 3.2 Gen2 Type-A (front)
1 x USB 3.2 Gen2 Type-C (front)
Rear USB ports2 x Thunderbolt4 Type-C (DP 1.4 alt-mode up to 4K@60 Hz /PD-out15 W) (Rear)
Video connectors2 x HDMI 2.1
Power
Power supply120 W
Size & build
Form factorMini PC
Overall dimensions1.48 in × 4.71 in × 4.54 in
Product weight1.1 lb (0.5 kg)
Shipping weight1.45 kg
Package size220 × 205 × 94 mm
Software
Operating systemWindows 11 Home
More details
AI capabilityCopilot+ PC

Questions about this item

How easy is it to replace the 1TB PCIe M.2 2280 M-Key SSD if it fails?

The M.2 2280 M-Key slot is accessible inside the chassis; swapping the 1TB PCIe drive only requires removing the bottom cover and one screw.

Which limit appears first when the Core Ultra 7 355 runs at full load for hours?

The 120W power adapter caps sustained performance before the thermal solution reaches its ceiling.

How loud and hot does the unit get when it runs all day with Wi-Fi 7 and Bluetooth 5.4 active?

Fan noise stays at a low office hum and the case remains warm but comfortable to touch during continuous operation.

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