Minisforum UM790 Pro Compatibility Guide
The UM790 Pro pairs a Ryzen 9 7940HS with DDR5 SO-DIMM upgrades and USB4 connectivity, bridging consumer and professional workflows. This guide covers RAM, storage, power, and docking compatibility.
Quick Specs Summary
| Component | Specification |
|---|---|
| Processor | AMD Ryzen 9 7940HS (8-core, 16-thread, 7.0GHz turbo) |
| RAM | DDR5-5200 SO-DIMM x2 (up to 64GB, upgradeable) |
| Storage | M.2 2280 NVMe x2 (PCIe 4.0) |
| Connectivity | USB4, WiFi 6E, Bluetooth 5.1, 2.5GbE |
| Display | HDMI 2.1, USB-C DP, USB4 (all independent outputs) |
| Power | 90W USB-C PD (Type-C, USB PD 3.1 compliant) |
| Form Factor | 156 × 139 × 67mm, 620g |
RAM Compatibility & Upgrades
Two DDR5-5200 SO-DIMM slots support up to 64GB total. The UM790 Pro is officially rated for DDR5-5200, but many users report DDR5-6000 stability. Stick with DDR5-5200 for guaranteed compatibility.
| Capacity | Speed | Price per Module | Total (2 sticks) | Link |
|---|---|---|---|---|
| 16GB DDR5-5200 SO-DIMM | 5200 MHz | £45–60 | 32GB total | View on Amazon UK |
| 32GB DDR5-5200 SO-DIMM | 5200 MHz | £85–115 | 64GB total | View on Amazon UK |
Popular Kits: Kingston FURY Beast, Corsair DOMINATOR, SK Hynix, and Samsung all deliver reliable performance.
Access: Remove the bottom panel with a Phillips screwdriver to access both SO-DIMM slots—installation takes under 2 minutes.
SSD Compatibility
Dual M.2 2280 NVMe (PCIe 4.0). Both slots are independent and user-replaceable. No thermal pads required, but monitor temperatures under heavy sustained workloads.
| Product | Capacity | Speed | Price | Link |
|---|---|---|---|---|
| Samsung 980 Pro | 1TB / 2TB | 7,100 MB/s | £80–150 | View on Amazon UK |
| WD Black SN850X | 1TB / 2TB / 4TB | 7,100 MB/s | £75–200 | View on Amazon UK |
| Crucial P5 Plus | 1TB / 2TB | 6,600 MB/s | £70–130 | View on Amazon UK |
| Sabrent Rocket 4 Plus | 1TB / 2TB | 7,000 MB/s | £65–125 | View on Amazon UK |
Power Supply & 90W USB-C PD
The UM790 Pro ships with a standard USB-C PD adapter and supports 90W USB-C Power Delivery. This is a key advantage for portability and office docking.
- USB-C PD Charging: Use any certified 90W+ USB-C PD charger (laptop, tablet, or standalone).
- Power Draw: 15–20W idle, 40–60W light/office use, 70W+ gaming.
- Docking Advantage: USB-C dock that supplies 90W PD will simultaneously charge and power all peripherals.
Recommended Chargers: Baseus 100W, Anker 100W, or Minisforum’s 90W USB-C adapter.
USB4 & Display Connectivity
The UM790 Pro includes USB4 (40 Gbps), enabling:
- Thunderbolt 3 Dock Support: Daisy-chain up to 6 devices; USB-C PD passthrough.
- eGPU Enclosures: Connect external GPUs (Razer Core X, OWC Thunderdock) for gaming/rendering boosts.
- High-Speed Data Transfer: 40 Gbps is overkill for current USB SSDs, but future-proof.
Display Outputs (all independent):
- HDMI 2.1 (4K@60Hz)
- USB-C DP 1.4 (4K@60Hz)
- USB4 (supports DP Alt Mode, 5K@60Hz)
Docking Recommendations:
- Premium: CalDigit TS4 or OWC Thunderdock (90W PD passthrough, dual HDMI/DP, 6 USB 3.1 ports).
- Budget: UGREEN 12-in-1 USB4 hub (multi-display, USB 3.1, SD, PD 65W pass-through).
WiFi 6E & Connectivity
WiFi 6E (802.11ax): ~1.2Gbps peak in ideal lab conditions. Real-world speeds: 300–600 Mbps.
- Bluetooth 5.1: Stable, low-latency wireless peripherals.
- 2.5GbE Ethernet: For home/office networks, use wired for guaranteed gigabit performance.
Thermal Management
The UM790 Pro runs cool under normal use (40–50°C), but sustained gaming (20+ min) can reach 70–80°C with fan noise increasing. Adequate ventilation (clear bottom) is essential.
- Passive Cooling: Possible for light office work if ambient temps are below 20°C.
- Intensive Use: Plan for active cooling and elevated fan noise under sustained 70W+ load.
Upgradeability Score
8/10 — Excellent RAM and SSD upgradeability, USB4 for future expansion (eGPU, docking), and 90W USB-C PD for modern workflows. Thermal design is the only limiting factor under sustained load.
FAQ
Can the UM790 Pro support 128GB RAM?
No. Maximum is 64GB with 2x32GB DDR5-5200 SO-DIMM. The Ryzen 9 7940HS platform limits memory to 64GB.
Does USB4 support eGPU?
Yes. USB4 is Thunderbolt 3/4 compatible. External GPUs like Razer Core X Chroma work, delivering ~70–80% of native GPU performance.
What’s the real-world gaming performance?
The Ryzen 9 7940HS iGPU handles esports titles (CS:GO, Valorant) at high settings 60+ fps. AAA titles (Cyberpunk 2077, Starfield) run at 30–45 fps low-medium settings at 1440p.
Can I use a 65W USB-C charger?
Yes, but it will charge slowly under load. For simultaneous charging and docking, use 90W+.
Is the WiFi module upgradeable?
No. WiFi 6E is soldered. Use 2.5GbE wired Ethernet as a fallback for critical applications.
Recommended Products
These are the products we recommend based on this guide. All links go to Amazon UK where you can check current prices and availability.
| Product | Why We Recommend It | Amazon UK |
|---|---|---|
| Corsair Vengeance DDR5 SO-DIMM 32GB (2×16GB) 5600MHz | Top-rated DDR5 kit for gaming & productivity | View on Amazon UK |
| Kingston Fury Impact DDR5 SO-DIMM 32GB (2×16GB) 5600MHz | Excellent DDR5 alternative with XMP support | View on Amazon UK |
| Crucial DDR5 SO-DIMM 16GB 5600MHz | Affordable single-stick DDR5 | View on Amazon UK |
| G.Skill Ripjaws DDR5 SO-DIMM 32GB 5600MHz | High performance DDR5 for enthusiasts | View on Amazon UK |
| Samsung 990 Pro 2TB NVMe M.2 2280 | Fastest consumer NVMe — ideal for gaming & editing | View on Amazon UK |
| WD Black SN850X 2TB NVMe | Excellent Gen4 speed with heatsink option | View on Amazon UK |
| Crucial P5 Plus 1TB NVMe | Great value Gen4 SSD | View on Amazon UK |
| Kingston NV2 1TB NVMe | Budget-friendly with solid reliability | View on Amazon UK |
Prices and availability may vary. As an Amazon Associate, we earn from qualifying purchases.
