MINISFORUM Mini PC UM870 Slim - Compact 8-Core Ryzen 7 Performance

In this review the MINISFORUM UM870 Slim stands out as a compact but capable desktop replacement aimed at power users who need high single-thread performance and a small footprint. The biggest reason to buy is its AMD Ryzen 7 8745H processor paired with DDR5 memory and a PCIe 4.0 SSD, which delivers desktop-grade responsiveness and multitasking in a tiny chassis. Reviewers who need ports, quiet cooling and GPU capability for productivity or light gaming will find it an attractive balance of power, size and value.

Key Features

• Processor: The AMD Ryzen 7 8745H 8-core processor delivers strong multi-tasking and high single-thread speeds up to 5.0 GHz for demanding applications.
• Memory and Storage: Dual DDR5 SODIMM support and an M.2 2280 PCIe 4.0 SSD slot provide fast system responsiveness and upgradable storage performance.
• Graphics: Integrated AMD Radeon 780M (RDNA3) offers capable GPU performance and high-resolution output for content work and casual gaming.
• Display Outputs: HDMI 2.1, DP 1.4 and USB4 ensure support for high-resolution displays, including 8K@60Hz over compatible outputs.
• Cooling and Noise: An active cooling solution with phase change material keeps sustained performance at around 60W while keeping noise below 35dB in typical use.
• Connectivity: Built-in Wi-Fi 6E, BT5.3 and a 2.5G wired LAN port plus multiple USB ports give modern networking and peripheral flexibility.

Who It's For

The UM870 Slim is best for users who need a compact desktop for content creation, software development, office productivity and light to moderate gaming without the bulk of a tower. Its strong Ryzen 7 CPU and fast DDR5/PCIe4 storage make it well suited to multitaskers and creators who want snappy performance from a small device.

It is less appropriate for users who require the absolute peak discrete GPU power for high-end triple-A gaming or for those who need a completely fanless, silent device; the UM870 prioritizes a balance of cooling and sustained performance rather than being optimized solely for ultra-quiet passive use.

Pros & Cons

Pros

• Compact chassis with a high-performance Ryzen 7 8745H that beats previous gen mobile chips in both CPU and GPU clock performance.
• Fast DDR5 memory and PCIe 4.0 SSD support deliver very responsive application load times and file transfers.
• Plenty of modern ports including USB4 and HDMI 2.1 for high-resolution displays and good peripheral support.
• Quiet, efficient cooling that sustains around 60W performance while keeping noise low.

Cons

• Integrated graphics are capable but not a replacement for a high-end discrete GPU for very demanding gaming or GPU compute workloads.
• Some users report mixed experiences with unit longevity or firmware updates, so driver updates should be applied before major OS upgrades.

Specifications

Processor	AMD Ryzen 7 8745H (8 cores, up to 5.0 GHz)
Graphics	AMD Radeon 780M (RDNA3, 12 CUs, up to 2700 MHz)
Memory	Dual DDR5 SODIMM support (configured here with 32GB)
Storage	M.2 2280 PCIe 4.0 SSD slot (1TB included, up to 4TB supported)
Display Outputs	HDMI 2.1 (8K@60Hz), DisplayPort 1.4 (4K@144Hz), USB4 (8K@60Hz)
Networking	Wi-Fi 6E, Bluetooth 5.3, 2.5G Ethernet

Our Verdict

The UM870 Slim is a strong choice for users who want near-desktop Ryzen 7 performance in a compact machine at good value. It pairs fast DDR5 RAM and PCIe 4.0 storage with capable integrated RDNA3 graphics and modern I/O, making it ideal for creators, professionals and casual gamers who need performance without a tower. Apply driver updates before major system changes to ensure optimal stability and longevity.

Frequently Asked Questions

Does it support multiple displays?
Yes. The UM870 Slim offers HDMI 2.1, DisplayPort 1.4 and USB4 outputs to drive high-resolution multi-monitor setups.

Can I upgrade RAM and storage?
Yes. It supports dual DDR5 SODIMM modules and an M.2 2280 PCIe 4.0 SSD slot, with total storage expandable up to the capacity the chassis and slots allow.

Is it quiet under load?
The active cooling system keeps noise typically below 35dB while sustaining around 60W performance, so it runs noticeably quieter than many small form factor systems under similar loads.