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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, up to 5.2 GHz boost) |
| RAM | DDR5-5600 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 | External DC barrel adapter (19V) |
| Form Factor | 156 × 139 × 67mm, 620g |
RAM Compatibility & Upgrades
Two DDR5-5600 SO-DIMM slots support up to 64GB total. The UM790 Pro is officially rated for DDR5-5600, but many users report DDR5-6000 stability. Stick with DDR5-5600 for guaranteed compatibility.
| Capacity | Speed | Price per Module* | Total (2 sticks) | Link |
|---|---|---|---|---|
| 16GB DDR5-5600 SO-DIMM | 5600 MHz | £45–60 | 32GB total | View on Amazon |
| 32GB DDR5-5600 SO-DIMM | 5600 MHz | £85–115 | 64GB total | View on Amazon |
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 |
| WD Black SN850X | 1TB / 2TB / 4TB | 7,100 MB/s | £75–200 | View on Amazon |
| Crucial P5 Plus | 1TB / 2TB | 6,600 MB/s | £70–130 | View on Amazon |
| Sabrent Rocket 4 Plus | 1TB / 2TB | 7,000 MB/s | £65–125 | View on Amazon |
Power Supply
The UM790 Pro ships with a 19V external DC barrel adapter and supports External DC power input. This is a key advantage for portability and office docking.
- Power input: Use the supplied DC adapter, or a replacement that matches its voltage and wattage. Do not rely on a USB-C charger to power this machine.
- 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 over USB4.
- 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 and USB4 for future expansion (eGPU, docking). Thermal design is the only limiting factor under sustained load.
FAQ
Can the UM790 Pro support 128GB RAM?
No. Maximum is 64GB with 2x32GB DDR5-5600 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 where you can check current prices and availability.
| Product | Why We Recommend It | Amazon |
|---|---|---|
| Corsair Vengeance DDR5 SO-DIMM 32GB (2×16GB) 5600MHz | Top-rated DDR5 kit for gaming & productivity | View on Amazon |
| Kingston Fury Impact DDR5 SO-DIMM 32GB (2×16GB) 5600MHz | Excellent DDR5 alternative with XMP support | View on Amazon |
| Crucial DDR5 SO-DIMM 16GB 5600MHz | Affordable single-stick DDR5 | View on Amazon |
| G.Skill Ripjaws DDR5 SO-DIMM 32GB 5600MHz | High performance DDR5 for enthusiasts | View on Amazon |
| Samsung 990 Pro 2TB NVMe M.2 2280 | Fastest consumer NVMe — ideal for gaming & editing | View on Amazon |
| WD Black SN850X 2TB NVMe | Excellent Gen4 speed with heatsink option | View on Amazon |
| Crucial P5 Plus 1TB NVMe | Great value Gen4 SSD | View on Amazon |
| Kingston NV2 1TB NVMe | Budget-friendly with solid reliability | View on Amazon |
Prices and availability may vary. As an Amazon Associate, we earn from qualifying purchases.
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- Minisforum Upgrade Guide
Not sure what fits? Use our free Compatibility Checker covering 3,195+ models.
Helpful Guides
Upgrades that fit the Minisforum UM790 Pro
What fits: Memory: DDR5-5600 SO-DIMM, 2 user slots, up to 64GB · Storage: 2x M.2 2280 NVMe PCIe 4.0
Spec source: store.minisforum.com (checked 26 Sep 2026).
As an Amazon Associate we earn from qualifying purchases. Prices & availability shown on Amazon.
DDR5 SO-DIMM memory that fits
M.2 2280 NVMe SSDs that fit
*Indicative UK street prices, shown for guidance only. These are not live Amazon prices and change frequently — check the current price on Amazon before buying.
