Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | GMKtec - NucBox M6 | Minisforum - UM790 Pro |
|---|---|---|
| RAM | 16 GB | 32 GB |
| Storage | 512 GB | 1024 GB |
| TDP | 45 W | 65 W |
| Volume | 0.55 L | 0.75 L |
Between the NucBox M6 and UM790 Pro, the NucBox M6 comes out ahead in tdp / volume, while the UM790 Pro wins on ram / storage. Overall, the NucBox M6 scores 67.1 and the UM790 Pro scores 71.8 on our Mars Score.
Which should you buy?
The UM790 Pro edges ahead on the Mars Score (67.1 vs 71.8), but the 4.7-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the NucBox M6 if you care most about tdp / volume. The biggest gaps in its favor are tdp, volume. The single most decisive one: TDP — 20.00 W less. 45 vs 65.
Pick the UM790 Pro if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. Its strongest claims are ram, storage. The single most decisive one: RAM — 100.00% more. 32 GB vs 16 GB.
Both ship with comparable thunderbolt, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: GMKtec - NucBox M6 or Minisforum - UM790 Pro?
Minisforum - UM790 Pro leads the current Mars Score by 4.7 points.The more useful decision is the trade-off behind that result: compare ram, storage, volume, tdp against the way you will actually use the product.
Choose GMKtec - NucBox M6 if…
GMKtec - NucBox M6 has the measurable edge on tdp w, volume l.
Choose Minisforum - UM790 Pro if…
Minisforum - UM790 Pro has the measurable edge on ram gb, storage gb.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why GMKtec - NucBox M6 wins
- ▲TDP — 20.00 W less. 45 vs 65.
- ▲Volume — 0.20 L less. 0.55 vs 0.75.
Why Minisforum - UM790 Pro wins
- ▲RAM — 100.00% more. 32 GB vs 16 GB.
- ▲Storage — 100.00% more. 1024 GB vs 512 GB.
Spec comparison
Core
Form & I/O
| Spec | GMKtec - NucBox M6 | Minisforum - UM790 Pro |
|---|---|---|
| Volume | 0.55 Llead | 0.75 L |
| Weight | 0.55 kglead | 0.66 kg |
| TDPⓘ | 45 Wlead | 65 W |
| USB ports | 4 | 5lead |
| Thunderboltⓘ | false | false |