MINISFORUM UM790 Pro-32GB/1TB
MINISFORUM Venus UM790 Pro Mini PC User Manual
Model: UM790 Pro-32GB/1TB | Brand: MINISFORUM
1. Introduction
The MINISFORUM Venus UM790 Pro Mini PC is a compact yet powerful computing solution designed for various applications, from demanding professional tasks to immersive gaming. Featuring the AMD Ryzen 9 7940HS processor and AMD Radeon 780M graphics, it delivers high performance in a small form factor. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your device.

Image: The MINISFORUM Venus UM790 Pro Mini PC, showcasing its compact design and front/rear ports.
2. Setup Guide
2.1 Package Contents
Verify that all components are present in the package:
- MINISFORUM Venus UM790 Pro Mini PC
- Power Adapter (minimum 65W PD power supply recommended)
- HDMI Cable
- User Manual (this document)
- Wall Mount Bracket (for VESA mounting)
2.2 Connecting Your Mini PC
- Power Connection: Connect the power adapter to the 19V= port on the rear of the Mini PC and plug it into a power outlet.
- Display Connection:
- Connect your monitor(s) to the HDMI 2.1 ports (x2) or USB4 ports (x2) on the Mini PC. The device supports up to four 4K displays simultaneously.
- For optimal performance, ensure your display cables are securely connected.

Image: The Mini PC connected to four monitors, demonstrating its quad display support for enhanced productivity.
- Peripherals: Connect your keyboard, mouse, and other USB devices to the available USB-A (x4) or USB4 (x2) ports.
- Network Connection:
- For a wired connection, connect an Ethernet cable from your router or modem to the RJ45 2.5G LAN port on the Mini PC.
- For wireless connectivity, the device supports Wi-Fi 6E and Bluetooth 5.3. Ensure your wireless network is configured correctly.

Image: An illustration showing the Mini PC's network capabilities, including Wi-Fi 6E, 2.5G RJ45 Ethernet, and Bluetooth 5.3.
- Audio: Connect speakers or headphones to the Audio Jack.
2.3 Wall Mounting (Optional)
The MINISFORUM UM790 Pro can be mounted to the back of a VESA-compatible monitor using the included bracket. This saves desk space and provides a cleaner setup.
- Attach the VESA mount bracket to the back of your monitor using the provided screws.
- Secure the Mini PC to the bracket.
3. Operating Your Mini PC
3.1 Powering On/Off
- Power On: Press the power button located on the front of the Mini PC. The power indicator light will illuminate.
- Power Off: To shut down, use the operating system's shutdown function. Alternatively, press and hold the power button for 5 seconds to force a shutdown (not recommended for regular use).
3.2 Performance Overview
The UM790 Pro is equipped with high-performance components to handle demanding tasks:
- Processor: AMD Ryzen 9 7940HS (8 cores/16 threads, up to 5.2GHz) with AMD Radeon 780M graphics.
- Memory: 32GB DDR5 5600 SODIMM dual-channel memory (expandable up to 64GB).
- Storage: Two M.2 2280 PCIe4.0 1TB SSDs, supporting RAID0 and RAID1 configurations for enhanced speed or data redundancy.

Image: An internal view highlighting the high-speed DDR5 RAM, capable of up to 5600MHz support.

Image: Demonstrating fast transfer speeds with dual PCIe4.0 NVMe SSDs and full-speed 40G USB4 ports.
3.3 BIOS Interface
The UM790 Pro features a new graphical BIOS interface, allowing for intuitive and clear adjustment of relevant parameters. To access the BIOS, press Del or F7 (as per user reviews) during startup.
3.4 USB4 Port Functionality
The two fully functional 40G full-speed USB4 ports support PD-IN and PD-OUT. This allows for versatile connections with monitors, portable displays, or docking stations. Note that a minimum 65W PD power supply is required for PD-IN, and maximum PD output power is 15W.

Image: The Mini PC connected via a single Type-C cable, illustrating the "Super One-Line Connection" capability for simplified setup.
3.5 Official Product Video
Watch the official product video for a visual guide on the MINISFORUM Venus UM790 Pro Mini PC's features and capabilities.
Video: An overview of the MINISFORUM Venus UM790 Pro Mini PC, highlighting its key features, performance, and connectivity options.
4. Maintenance
4.1 Cooling System (COLD WAVE 2.0)
The UM790 Pro features an innovative liquid metal cooling system, COLD WAVE 2.0, which includes an active memory and SSD cooler (quiet fan + large heatsink). This system ensures optimal performance and lower noise levels by efficiently dissipating heat from the processor, memory, and solid-state drives. Regular cleaning of external vents to prevent dust buildup is recommended to maintain cooling efficiency.

Image: An exploded view illustrating the COLD WAVE 2.0 cooling system, showing the liquid metal application and active cooling components for memory and SSD.
4.2 Hardware Upgrades
The Mini PC is designed for easy hardware upgrades. You can upgrade the DDR5 SODIMM memory (up to 64GB) and add or replace M.2 2280 PCIe4.0 SSDs. Refer to the internal component diagram for slot locations.

Image: An exploded view of the Mini PC, detailing the locations of DDR5 dual-channel SODIMM slots and M.2 2280 PCIe4.0 SSD slots for easy upgrades.
5. Troubleshooting
This section addresses common issues you might encounter with your MINISFORUM UM790 Pro Mini PC.
| Issue | Possible Cause | Solution |
|---|---|---|
| No Power / System Not Starting | Loose power connection, faulty power adapter. | Ensure power adapter is securely connected to both the Mini PC and the power outlet. Verify the power outlet is functional. |
| No Display Output | Incorrect display cable connection, monitor input not selected, driver issues. | Check HDMI/USB4 cable connections. Ensure your monitor is set to the correct input source. Update graphics drivers. |
| Wi-Fi Instability / Disconnections | Driver issues, router interference, MIMO Powersave mode settings. | Update Wi-Fi drivers. Try changing the Wi-Fi adapter's MIMO Powersave mode to "No SMPS" in device settings (Windows). Ensure the Mini PC is within good range of your Wi-Fi router. |
| Random Crashes / Blue Screens (BSOD) | Outdated drivers, software conflicts, hardware issues (RAM/SSD). | Ensure all drivers (chipset, graphics, network) and BIOS are up to date. Run system diagnostics. If using custom RAM/SSD, ensure compatibility and proper installation. Consider reinstalling the operating system as a last resort. |
| Poor Wireless Performance | Antenna configuration, signal interference. | Ensure the Mini PC is not obstructed by metal objects. Consider using a wired Ethernet connection for critical tasks. |
If you continue to experience issues, please refer to the Warranty and Support section for contact information.
6. Specifications
| Feature | Detail |
|---|---|
| Processor | AMD Ryzen 9 7940HS (8 cores/16 threads, up to 5.2GHz) |
| Graphics Coprocessor | AMD Radeon 780M |
| RAM | 32 GB DDR5 (5600 MHz), Dual-channel, Max 64GB |
| Hard Drive | 1 TB (2 x M.2 2280 PCIe4.0 SSD, supports RAID0/RAID1) |
| Operating System | OS (Pre-installed) |
| Wireless Connectivity | Wi-Fi 6E, Bluetooth 5.3 |
| Ethernet | RJ45 2.5G LAN Port x1 |
| USB Ports | USB4 x2 (full-function, PD-IN/OUT), USB3.2 Gen2 Type-A x4 |
| Video Output | HDMI 2.1 x2, USB4 x2 (supports 4K video on four screens) |
| Audio | Audio Jack x1, DMIC x1 |
| Dimensions | 7.17 x 6.34 x 4.61 inches (Package) |
| Weight | 3.25 pounds (Item) |
| Color | Black |
7. Warranty and Support
For warranty information and technical support, please contact MINISFORUM directly. User reviews indicate that MINISFORUM provides prompt support for quality issues.
Contact Email: service@minisforum.com
Please have your product model number (UM790 Pro-32GB/1TB) and purchase details ready when contacting support.
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