Corsair
Corsair RM850e
850W · 80+ Gold · 12VHPWR
89
/ 100
From $139
VS
Seasonic PRIME TX-1300 wins by 4
Seasonic
Seasonic PRIME TX-1300
1300W · 80+ Titanium · 12VHPWR
93
/ 100
From $359
Specdex verdict
Seasonic PRIME TX-1300 takes it — here’s why.
In our weighted Specdex score, Corsair RM850e lands at 89 and Seasonic PRIME TX-1300 at 93. That puts Seasonic PRIME TX-1300 ahead by 4 points — a narrow margin driven mostly by its strengths in the categories below.
Pick Corsair RM850e if…
- ✓Sub-$150 12VHPWR-ready PSU
- ✓80+ Gold + Cybenetics Gold
- ✓7-year warranty
Pick Seasonic PRIME TX-1300 if…
- ✓80+ Titanium efficiency
- ✓12-year warranty
- ✓Pure-DC fan profile
Corsair RM850e 89
vs 93 Seasonic PRIME TX-1300
Score breakdown
Corsair RM850e
89 efficiency 92
build 90
features 88
value 96
Seasonic PRIME TX-1300
93 efficiency 100
build 96
features 90
value 84
Specs side-by-side
| Spec | Corsair RM850e | Seasonic PRIME TX-1300 |
|---|---|---|
| Wattage | 850W | 1300W |
| Efficiency | 80+ Gold | 80+ Titanium |
| Cooling | 120 mm rifle-bearing fan | 135 mm fluid-dynamic-bearing fan |
| Modular | Fully modular | Fully modular |
| 12VHPWR | 1× 600W native | Native cable included |
| Warranty | 7 years | 12 years |
Corsair RM850e
Pros
- +Sub-$150 12VHPWR-ready PSU
- +80+ Gold + Cybenetics Gold
- +7-year warranty
Cons
- −Single-rail design (mostly fine)
- −Cables ribbon-flat (some prefer round)
- −No iCUE Link
Seasonic PRIME TX-1300
Pros
- +80+ Titanium efficiency
- +12-year warranty
- +Pure-DC fan profile
Cons
- −Premium pricing
- −Heavier than Gold-rated equivalents
- −Cables stiff
FAQ: Corsair RM850e vs Seasonic PRIME TX-1300
Which is better, Corsair RM850e or Seasonic PRIME TX-1300? +
Seasonic PRIME TX-1300 scores 93 on our weighted rubric — ahead by 4. Your best pick depends on the sub-scores above.
Is Corsair RM850e worth the price? +
At $139, Corsair RM850e delivers a Specdex score of 89 — strongest in value.
Is Seasonic PRIME TX-1300 worth the price? +
At $359, Seasonic PRIME TX-1300 delivers a Specdex score of 93 — strongest in efficiency.
Does Corsair RM850e or Seasonic PRIME TX-1300 last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.