Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Corsair - HX1500i (2023) | Seasonic - FOCUS GX-850 |
|---|---|---|
| Wattage | 1500 W | 850 W |
| Efficiency | 80+ Platinum | 80+ Gold |
Between the HX1500i (2023) and FOCUS GX-850, the HX1500i (2023) comes out ahead in wattage / efficiency, while the FOCUS GX-850 wins on several specs. Overall, the HX1500i (2023) scores 91 and the FOCUS GX-850 scores 80.3 on our Mars Score.
Which should you buy?
The HX1500i (2023) is the clear pick on raw spec strength, leading by 10.7 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the HX1500i (2023) if you care most about wattage / efficiency. The biggest gaps in its favor are wattage, efficiency. The single most decisive one: Wattage — 76.47% more. 1500 W vs 850 W.
The FOCUS GX-850 similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable modular, atx 3.0 / 12vhpwr, warranty, so those specs do not separate the two — focus on the differences below.
Bottom line: the HX1500i (2023) is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Corsair - HX1500i (2023) or Seasonic - FOCUS GX-850?
Corsair - HX1500i (2023) leads the current Mars Score by 10.7 points.The more useful decision is the trade-off behind that result: compare wattage, efficiency against the way you will actually use the product.
Choose Corsair - HX1500i (2023) if…
Corsair - HX1500i (2023) has the measurable edge on wattage w, efficiency.
Choose Seasonic - FOCUS GX-850 if…
Seasonic - FOCUS GX-850 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 - HX1500i (2023) wins
- ▲Wattage — 76.47% more. 1500 W vs 850 W.
- ▲Efficiency: 80+ Platinum (vs 80+ Gold).
Why Seasonic - FOCUS GX-850 wins
- No decisive advantages.
Spec comparison
Spec
| Spec | Corsair - HX1500i (2023) | Seasonic - FOCUS GX-850 |
|---|---|---|
| Wattage | 1500 Wlead | 850 W |
| Efficiency | 80+ Platinumlead | 80+ Gold |
| Form factor | ATX | ATX |
Features
| Spec | Corsair - HX1500i (2023) | Seasonic - FOCUS GX-850 |
|---|---|---|
| Modular | full | full |
| Average noise (Cybenetics) | 27.55 dB(A)lead | 30.73 dB(A) |
| ATX 3.0 / 12VHPWR | true | true |
| Warranty | 10 yrs | 10 yrs |