Between the SF1000L and FOCUS GX-850, the SF1000L comes out ahead in wattage, while the FOCUS GX-850 wins on warranty. Overall, the SF1000L scores 68.3 and the FOCUS GX-850 scores 61.1 on our Mars Score.
Which should you buy?
The SF1000L edges ahead on the Mars Score (68.3 vs 61.1), but the 7.2-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the SF1000L if you care most about wattage. The biggest gaps in its favor are wattage.
Pick the FOCUS GX-850 if you care most about warranty. Its strongest claims are warranty.
Both ship with comparable efficiency, modular, atx 3.0 / 12vhpwr, so those specs don't separate the two — focus on the differences below.
Bottom line: the SF1000L is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Corsair - SF1000L wins
- ▲Wattage — 17.65% more. 1000 W vs 850 W.
Why Seasonic - FOCUS GX-850 wins
- ▲Warranty — 3.00 yrs more. 10 vs 7.
Spec comparison
Spec
| Spec | Corsair - SF1000L | Seasonic - FOCUS GX-850 |
|---|---|---|
| Wattage | 1000 Wlead | 850 W |
| Efficiency | 80+ Gold | 80+ Gold |
| Form factor | SFX-Llead | ATX |
Features
| Spec | Corsair - SF1000L | Seasonic - FOCUS GX-850 |
|---|---|---|
| Modular | full | full |
| ATX 3.0 / 12VHPWR | true | true |
| Warranty | 7 yrs | 10 yrslead |
Frequently asked
Spec-level deep dives
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