Between the SF1000L and FOCUS PX-650, the SF1000L comes out ahead in wattage and atx 3.0 / 12vhpwr, while the FOCUS PX-650 wins on warranty and efficiency. Overall, the SF1000L scores 68.3 and the FOCUS PX-650 scores 50.8 on our Mars Score.
Which should you buy?
The SF1000L is the clear pick on raw spec strength, leading by 17.5 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 SF1000L if you care most about wattage and atx 3.0 / 12vhpwr. The biggest gaps in its favor are wattage, atx 3.0 / 12vhpwr.
Pick the FOCUS PX-650 if you care most about warranty and efficiency. Its strongest claims are warranty, efficiency.
Both ship with comparable modular, 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 — 53.85% more. 1000 W vs 650 W.
- ▲Has ATX 3.0 / 12VHPWR.
Why Seasonic - FOCUS PX-650 wins
- ▲Warranty — 3.00 yrs more. 10 vs 7.
- ▲Efficiency: 80+ Platinum (vs 80+ Gold).
Spec comparison
Spec
| Spec | Corsair - SF1000L | Seasonic - FOCUS PX-650 |
|---|---|---|
| Wattage | 1000 Wlead | 650 W |
| Efficiency | 80+ Gold | 80+ Platinumlead |
| Form factor | SFX-Llead | ATX |
Features
| Spec | Corsair - SF1000L | Seasonic - FOCUS PX-650 |
|---|---|---|
| Modular | full | full |
| ATX 3.0 / 12VHPWR | truelead | false |
| Warranty | 7 yrs | 10 yrslead |
Frequently asked
Spec-level deep dives
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