Short answer: good power supplies come with 7 to 10 year warranties. A long warranty is one of the clearest signs of a quality unit. Keep your proof of purchase, and know that damage from mixing cables usually isn’t covered.
Typical warranty lengths
| Power supply | Warranty |
|---|---|
| Corsair RMx (2024) | 10 years |
| Seasonic Focus GX V4 | 10 years |
| NZXT C Series Gold (2024) | 10 years |
| Seasonic Core GX ATX 3 | 7 years |
| Corsair SF Platinum (2024) | 7 years |
Reviewers don’t always agree on what counts as good. Tom’s Hardware listed the Core GX’s 7 years as a plus, while KitGuru called it a minus next to rivals offering 10.
What’s usually covered
- The unit failing in normal use.
- A failed fan.
- The cables supplied with it.
What’s usually not covered
- Damage from cables made for another unit. NZXT says this isn’t covered by its warranty.
- Opening the unit or modifying it.
- Physical damage or liquid.
- Damage to other parts. Check the terms. Most warranties cover the power supply only.
How to claim
- Find your proof of purchase. Your Amazon order history works.
- Note the serial number from the label on the unit.
- Contact the maker, not the retailer, once the retailer’s return window has passed.
- Describe the fault clearly. Photos of any damage help.
- Keep the original cables. Some makers want them back with the unit.
Warranty and buying
For a unit you’ll keep for years, warranty is worth weighing alongside price. It also tells you how long the unit is likely to last. See how long power supplies last.
- 10-year warranty · Tier ACorsair RMx (2024)80 Plus Gold · Fully modular · ATX · 750/850/1000WCorsair’s cover for the 2024 RMx.Check 850W price
- 10-year warranty · Tier ANZXT C Series Gold (2024)80 Plus Gold · Fully modular · ATX · 850/1000/1200WQuiet and well built, according to KitGuru.Check 850W price
Questions
Is a 7-year warranty bad?
No. It’s still good. Many rivals offer 10 years, so weigh it against price.
Does the warranty transfer if I buy second hand?
It depends on the maker. Many require the original proof of purchase.
Do I need to register my power supply?
Some makers ask you to. Check the box or the maker’s site.
Will the warranty cover my graphics card if the power supply fails?
Usually not. Most warranties cover the power supply only.
Does using the wrong cable void the warranty?
NZXT says damage from incompatible cables isn’t covered. Other brands are likely to take the same view.
Sources
- Corsair: RMx series update (September 2024)
- NZXT: PSU cable compatibility
- KitGuru: Corsair RM850x ATX 3.1 review
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