MINISFORUM UM870 Slim Mini PC Barebone - Compact 8C/16T Ryzen

In this review the MINISFORUM UM870 Slim mini PC is presented as a compact workstation for users who need strong CPU and GPU performance in a small footprint. The single biggest reason to consider it is the pairing of an AMD Ryzen 7 8745H with RDNA3 Radeon 780M graphics, which delivers noticeably higher multi-threaded speed and much better integrated graphics than many other mini PCs. This barebone unit arrives without RAM, storage, or an OS, so it is best for builders who plan to install DDR5 memory and an M.2 PCIe4.0 SSD to unlock its full potential.

Key Features

• Powerful Processor: The AMD Ryzen 7 8745H provides 8 cores and up to 5.0 GHz turbo for smooth multitasking and CPU-heavy workflows.
• High-performance Graphics: Integrated AMD Radeon 780M (RDNA3) supports high-resolution output and higher refresh rates for creative work and media playback.
• DDR5 and PCIe4.0 Support: Dual DDR5 SODIMM slots and M.2 2280 PCIe4.0 SSD bays let users install fast memory and storage for snappy system responsiveness.
• Versatile Display Outputs: HDMI 2.1, DisplayPort 1.4 and USB4 offer up to 8K@60Hz and 4K@144Hz output options for multi-monitor setups and high-resolution displays.
• Efficient Cooling: Active cooling with phase change material reduces CPU temperature and sustains a stable 60W performance with low noise under load.
• Fast Networking: Onboard 2.5G wired LAN plus Wi-Fi 6E and Bluetooth 5.3 deliver reliable high-speed connections for streaming and remote work.

Who It's For

The UM870 Slim is aimed at enthusiasts and professionals who want a compact desktop that handles photo and video editing, software development, and multimedia playback without a discrete GPU. Its strong integrated graphics and CPU make it suitable for creators on a desk with limited space.

It is not ideal for users who expect a fully configured out-of-the-box PC, since the unit is a barebone with no DDR5 modules, no SSD, and no operating system included. Casual buyers who prefer turnkey desktops or need top-tier discrete GPU performance should look elsewhere.

Pros & Cons

Pros

• Excellent CPU performance from the Ryzen 7 8745H, giving fast multi-threaded speeds for productivity tasks.
• Strong integrated Radeon 780M graphics capable of high-resolution displays and smooth media playback.
• Quiet and efficient cooling that keeps temperatures down while maintaining steady performance.
• Modern connectivity including USB4, HDMI 2.1, and Wi-Fi 6E for flexible peripheral and display support.

Cons

• Ships as a barebone; buyers must provide DDR5 RAM, an M.2 SSD and install an OS before use.
• Not a substitute for a system with a high-end dedicated GPU for demanding 3D gaming or workstation rendering.

Specifications

Our Verdict

The MINISFORUM UM870 Slim is a strong value for users who want a compact, quiet mini PC with a high-performance Ryzen 7 CPU and capable integrated graphics. It rewards buyers who are comfortable adding DDR5 memory, an M.2 PCIe4.0 SSD and installing an OS, and it delivers solid workstation-style performance and modern ports for a range of productivity and media tasks.

Frequently Asked Questions

Does the unit include RAM and storage?
No, the UM870 Slim is a barebone and does not include DDR5 RAM, M.2 SSDs, or an operating system; those must be installed by the user.

Can it drive multiple high-resolution monitors?
Yes, with HDMI 2.1, DisplayPort 1.4 and USB4 you can connect high-resolution and high-refresh displays up to 8K@60Hz depending on cable and monitor support.

Is it suitable for heavy gaming?
It handles light to moderate gaming well on the integrated Radeon 780M, but buyers who need top-tier 3D performance should choose a system with a discrete GPU.