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Corsair
Corsair RM850x (ATX 3.1)
850 W · fully modular
- Wattage 850 W · fully modular
- Standard ATX 3.1, PCIe 5.1
- GPU connector Native 12V-2x6
- Efficiency Cybenetics Gold
See price on Amazon (opens Amazon in a new tab)
Price, availability and customer reviews are on Amazon.
Amazon listing: “CORSAIR RM850x ATX 3.1 PCIe 5.1 Ready Fully Modular 850W Power Supply – Low-Noise, Cybenetics Gold Efficiency, Native 12V-2x6 Connector” · ASIN B0FLFGG1CC
Who it’s for
Single-graphics-card PCs up to an RTX 5080 (NVIDIA asks for 850 W with that card).
Pros
- Native 12V-2x6 cable for current NVIDIA cards
- 10-year warranty
Cons
- Not enough for an RTX 5090 (NVIDIA asks for 1,000 W)
Pros and cons come from the maker’s specs below, not from testing this unit. How we pick.
Specifications
| Wattage | 850 W · fully modular |
|---|---|
| Standard | ATX 3.1, PCIe 5.1 |
| GPU connector | Native 12V-2x6 |
| Efficiency | Cybenetics Gold |
| Warranty | 10 years |
Source: KitGuru review spec table · Amazon listing checked 2026-09-29.
Compare with other power & protection
| Product | Wattage | Standard | GPU connector | Efficiency | Warranty |
|---|---|---|---|---|---|
| Corsair RM850x (ATX 3.1)This product | 850 W · fully modular | ATX 3.1, PCIe 5.1 | Native 12V-2x6 | Cybenetics Gold | 10 years |
| Seasonic Focus GX-850 (ATX 3.1) | 850 W · fully modular | ATX 3.1, PCIe 5.1 | 12V-2x6 | 80 PLUS Gold | 10 years |
| Corsair RM1000x (ATX 3.1) | 1000 W · fully modular | ATX 3.1, PCIe 5.1 | 12V-2x6 | — | — |