Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Corsair - RM1200x SHIFT | EVGA - SuperNOVA 850 G7 |
|---|---|---|
| Wattage | 1200 W | 850 W |
| ATX 3.0 / 12VHPWR | true | false |
Between the RM1200x SHIFT and SuperNOVA 850 G7, the RM1200x SHIFT comes out ahead in wattage / atx 3.0 / 12vhpwr, while the SuperNOVA 850 G7 wins on several specs. Overall, the RM1200x SHIFT scores 84.5 and the SuperNOVA 850 G7 scores 80.3 on our Mars Score.
Which should you buy?
The RM1200x SHIFT edges ahead on the Mars Score (84.5 vs 80.3), but the 4.2-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the RM1200x SHIFT if you care most about wattage / atx 3.0 / 12vhpwr. The biggest gaps in its favor are wattage, atx 3.0 / 12vhpwr. The single most decisive one: Wattage — 41.18% more. 1200 W vs 850 W.
The SuperNOVA 850 G7 similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable efficiency, modular, warranty, 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: Corsair - RM1200x SHIFT or EVGA - SuperNOVA 850 G7?
Corsair - RM1200x SHIFT leads the current Mars Score by 4.2 points.The more useful decision is the trade-off behind that result: compare wattage against the way you will actually use the product.
Choose Corsair - RM1200x SHIFT if…
Corsair - RM1200x SHIFT has the measurable edge on wattage w, has atx 3.
Choose EVGA - SuperNOVA 850 G7 if…
EVGA - SuperNOVA 850 G7 does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
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 Corsair - RM1200x SHIFT wins
- ▲Wattage — 41.18% more. 1200 W vs 850 W.
- ▲Has ATX 3.0 / 12VHPWR.
Why EVGA - SuperNOVA 850 G7 wins
- No decisive advantages.
Spec comparison
Spec
| Spec | Corsair - RM1200x SHIFT | EVGA - SuperNOVA 850 G7 |
|---|---|---|
| Wattage | 1200 Wlead | 850 W |
| Efficiency | 80+ Gold | 80+ Gold |
| Form factor | ATX | ATX |
Features
| Spec | Corsair - RM1200x SHIFT | EVGA - SuperNOVA 850 G7 |
|---|---|---|
| Modular | full | full |
| Average noise (Cybenetics) | 29.40 dB(A)lead | 32.40 dB(A) |
| ATX 3.0 / 12VHPWR | truelead | false |
| Warranty | 10 yrs | 10 yrs |