Between the SF1000L and VERTEX GX-1200, the SF1000L comes out ahead in several specs, while the VERTEX GX-1200 wins on wattage and warranty. Overall, the SF1000L scores 68.3 and the VERTEX GX-1200 scores 77.5 on our Mars Score.
Which should you buy?
The VERTEX GX-1200 is the clear pick on raw spec strength, leading by 9.2 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.
The SF1000L doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
Pick the VERTEX GX-1200 if you care most about wattage and warranty. Its strongest claims are wattage, 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 VERTEX GX-1200 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
- No decisive advantages.
Why Seasonic - VERTEX GX-1200 wins
- ▲Wattage — 20.00% more. 1200 W vs 1000 W.
- ▲Warranty — 5.00 yrs more. 12 vs 7.
Spec comparison
Spec
| Spec | Corsair - SF1000L | Seasonic - VERTEX GX-1200 |
|---|---|---|
| Wattage | 1000 W | 1200 Wlead |
| Efficiency | 80+ Gold | 80+ Gold |
| Form factor | SFX-Llead | ATX |
Features
| Spec | Corsair - SF1000L | Seasonic - VERTEX GX-1200 |
|---|---|---|
| Modular | full | full |
| ATX 3.0 / 12VHPWR | true | true |
| Warranty | 7 yrs | 12 yrslead |
Frequently asked
Spec-level deep dives
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