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Corsair
Corsair RM1000x (ATX 3.1)
1000 W · fully modular
- Wattage 1000 W · fully modular
- Standard ATX 3.1, PCIe 5.1
- GPU connector 12V-2x6
See price on Amazon (opens Amazon in a new tab)
Price, availability and customer reviews are on Amazon.
Amazon listing: “CORSAIR RM1000x ATX 3.1 PCIe 5.1 1000W Power Supply – Black” · ASIN B0DJ1M9C62
Who it’s for
RTX 5090-class systems — NVIDIA asks for 1,000 W.
Pros
- Meets NVIDIA's 1,000 W recommendation for the RTX 5090
- ATX 3.1 with 12V-2x6
Cons
- More capacity than a mid-range build needs — NVIDIA asks for 650–750 W with an RTX 5070 or 5070 Ti
Pros and cons come from the maker’s specs below, not from testing this unit. How we pick.
Specifications
| Wattage | 1000 W · fully modular |
|---|---|
| Standard | ATX 3.1, PCIe 5.1 |
| GPU connector | 12V-2x6 |
| Efficiency | Not listed in our source |
| Warranty | Not listed in our source |
Source: Amazon listing from the brand's store · Amazon listing checked 2026-09-29.
Compare with other power & protection
| Product | Wattage | Standard | GPU connector | Efficiency | Warranty |
|---|---|---|---|---|---|
| Corsair RM850x (ATX 3.1) | 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)This product | 1000 W · fully modular | ATX 3.1, PCIe 5.1 | 12V-2x6 | — | — |