MSI Cubi NUC AI+ 3MG Mini PC Barebone - Intel Core Ultra 9 386H
The MSI Cubi NUC AI+ 3MG is a compact mini PC barebone powered by an Intel Core Ultra 9 386H proce...The MSI Cubi NUC AI+ 3MG is a compact mini PC barebone powered by an Intel Core Ultra 9 386H processor with a built-in NPU for on-device AI acceleration. Its tiny footprint fits almost anywhere, including behind a monitor via VESA mounting, while still delivering capable performance for business and everyday computing. Supplied as a barebone, so you can add your own memory, storage and operating system.
The MSI Cubi NUC AI+ 3MG is a high-performance barebone mini PC designed for professionals and business users who need compact computing power paired with on-device AI acceleration. Featuring the Intel Core Ultra 9 386H processor and an integrated NPU, it handles demanding workloads in a footprint of just 0.51 liters. Please note that as a barebone system, it requires the user to purchase and install their own memory (RAM), storage drives, and operating system, making it ideal for those who prefer custom-configured hardware.
All features
Series
Cubi NUC
Model Part Number
Cubi NUC AI+ 3MG
Brand
MSI
Extended Product Information
FAQs
Does this system come with RAM or storage pre-installed?
No, this is a barebone system. You must purchase and install your own DDR5 SO-DIMM memory and storage drive.
Can I mount this behind any monitor?
It supports standard 75x75 mm VESA mounting. Ensure your monitor has these mounting holes on the back.
What is the maximum RAM capacity?
The system supports up to 128 GB of internal memory.
Does it have a built-in operating system?
No, you must provide and install your own operating system.
What is the function of the NPU?
The integrated NPU is designed to handle AI workloads locally, such as image processing or natural language tasks, reducing the burden on the CPU and GPU.
Is the power supply included?
Yes, a 120W power supply unit is included with the barebone.
Troubleshooting
The system will not boot after installing new RAM.
Ensure the RAM sticks are fully seated in the SO-DIMM slots and that the modules are DDR5 compatible.
The system feels warm during heavy AI tasks.
Ensure that the air intake and exhaust vents are not obstructed. Use the MSI Frozr AI settings to adjust fan curves for better thermal management.
Monitor shows no signal via HDMI.
Verify the HDMI cable connection and ensure the monitor is set to the correct input source. Try using the Thunderbolt 4 port as an alternative display output.
Pros and Cons
Pros
Extremely compact and space-saving design
High-end Intel Core Ultra 9 processor for heavy workloads
Future-proof connectivity including Thunderbolt 4 and Wi-Fi 7
Strong security features including dTPM and fingerprint reader
Tool-less internal access for easy upgrades
Cons
Requires separate purchase of RAM, SSD/HDD, and OS
Not intended for users uncomfortable with hardware installation
Integrated graphics may not satisfy high-end gaming or 3D rendering needs
Setup, Compatibility & Care
Installation: Since this is a barebone unit, ensure you have compatible SO-DIMM DDR5 RAM and an M.2 NVMe SSD or 2.5-inch drive available. Open the chassis using the tool-less mechanism, insert your components, and secure them.
Operating System: You will need a bootable USB drive with your chosen Windows or Linux distribution to perform a clean install.
Mounting: Use the included 75x75 mm VESA mount interface to secure the unit to the back of a compatible monitor. Ensure there is adequate space around the vents for air circulation.
Care: Keep the system vents free of dust to maintain cooling efficiency. Use the provided Power Meter software to monitor your energy consumption and optimize your power settings for long-term efficiency.