Seasonic - PRIME TX-1300 vs Seasonic - VERTEX GX-1200
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Seasonic - PRIME TX-1300 | Seasonic - VERTEX GX-1200 |
|---|---|---|
| Wattage | 1300 W | 1200 W |
| Efficiency | 80+ Titanium | 80+ Gold |
Between the PRIME TX-1300 and VERTEX GX-1200, the PRIME TX-1300 comes out ahead in wattage / efficiency, while the VERTEX GX-1200 wins on several specs. Overall, the PRIME TX-1300 scores 91.5 and the VERTEX GX-1200 scores 84.5 on our Mars Score.
Which should you buy?
The PRIME TX-1300 edges ahead on the Mars Score (91.5 vs 84.5), but the 7.0-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the PRIME TX-1300 if you care most about wattage / efficiency. The biggest gaps in its favor are wattage, efficiency. The single most decisive one: Wattage — 8.33% more. 1300 W vs 1200 W.
The VERTEX GX-1200 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 PRIME TX-1300 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: Seasonic - PRIME TX-1300 or Seasonic - VERTEX GX-1200?
Seasonic - PRIME TX-1300 leads the current Mars Score by 7.0 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 Seasonic - PRIME TX-1300 if…
Seasonic - PRIME TX-1300 has the measurable edge on wattage w, efficiency.
Choose Seasonic - VERTEX GX-1200 if…
Seasonic - VERTEX GX-1200 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 Seasonic - PRIME TX-1300 wins
- ▲Wattage — 8.33% more. 1300 W vs 1200 W.
- ▲Efficiency: 80+ Titanium (vs 80+ Gold).
Why Seasonic - VERTEX GX-1200 wins
- No decisive advantages.
Spec comparison
Spec
| Spec | Seasonic - PRIME TX-1300 | Seasonic - VERTEX GX-1200 |
|---|---|---|
| Wattage | 1300 Wlead | 1200 W |
| Efficiency | 80+ Titaniumlead | 80+ Gold |
| Form factor | ATX | ATX |
Features
| Spec | Seasonic - PRIME TX-1300 | Seasonic - VERTEX GX-1200 |
|---|---|---|
| Modular | full | full |
| Average noise (Cybenetics) | 11.02 dB(A)lead | 25.41 dB(A) |
| ATX 3.0 / 12VHPWR | true | true |
| Warranty | 12 yrs | 12 yrs |