CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully Modular 1000W Power Supply – Low-Noise, Cybenetics Gold Efficiency, Native 12V-2x6…
Best for
Best 1000W (for RTX 4080+)
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Current price
$159.99
Updated May 18, 2026 · 1 min read
Sources behind this verdict
11 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the Corsair RM1000x is essentially the RM850x with more headroom, and the consensus carries over cleanly. kitguru.net describes the broader RMx 2024 platform as fully modular with all-Japanese capacitors, low-noise dynamic-bearing fans, and a 10-year warranty. Corsair's own spec sheet (Cybenetics Gold, ATX 3.1, PCIe 5.1, Zero-RPM mode) is straightforwardly corroborated by retailer listings on newegg.com.
What reviewers liked
- Generous headroom for RTX 4080, 4090, and 5090-class GPUs, with verified r/Corsair owner reports of stable operation
- Same Cybenetics Gold efficiency, Japanese capacitors, and 10-year warranty as the rest of the high-rated RMx ATX 3.1 line
- Native 12V-2x6 cable plus zero-RPM fan mode for quiet operation at typical loads
- Very large verified-purchase base (3,519 Amazon reviews at 4.7 stars) corroborates real-world reliability
Where it falls short
- Overkill and wasteful for builds below an RTX 4080 tier
- r/buildapcsales has flagged Amazon listings from third-party sellers with poor reputations, so seller verification is important
- Premium pricing versus equivalent-wattage budget alternatives
- No higher efficiency tier (Platinum/Titanium) at this price point, unlike the ASUS ROG Strix Platinum
Across the reviewers we read, the Corsair RM1000x is essentially the RM850x with more headroom, and the consensus carries over cleanly. kitguru.net describes the broader RMx 2024 platform as fully modular with all-Japanese capacitors, low-noise dynamic-bearing fans, and a 10-year warranty. Corsair's own spec sheet (Cybenetics Gold, ATX 3.1, PCIe 5.1, Zero-RPM mode) is straightforwardly corroborated by retailer listings on newegg.com.
Specialist-community sentiment is the strongest endorsement here. r/buildapcsales and r/Corsair threads include multiple owners running RTX 4080 Super and RTX 5090 systems on this unit with no stability problems and 'dead quiet' acoustics in water-cooled builds. r/buildapcsales commenters specifically call out that newer batches now ship with cable combs on the 24-pin and 12V-2x6 cables, an upgrade that earlier RMx buyers had to pay extra for.
The main consideration is whether you actually need 1000W. For RTX 4080-class and above, transient spikes and future-proofing make it the sensible step up; for anything below a 4080, the 850W RM850x is the better value. One r/buildapcsales thread warns about third-party Amazon sellers with negative ratings, so buyers are advised to confirm the seller before purchase.
- Fully Modular
- Reliable and efficient low-noise power supply with fully modular cabling, so you only have to connect the cables your system needs.
- Cybenetics Gold-Certified
- Rated for up to 91% efficiency, resulting in lower power consumption, less noise, and cooler temperatures.
- ATX 3.1 Compliant
- Compliant with the ATX 3.1 power standard from Intel, supporting PCIe 5.1 and resisting transient power spikes.
- Native 12V-2x6 Connector
- Ensures compatibility with the latest graphics cards with a direct GPU to PSU connection – no adapter necessary.
- Embossed Cables with Low-Profile Combs
- Sleek, ultra-flexible embossed cables look great and make installing and connecting the RMx a breeze.
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[PSU] CORSAIR RM1000x ATX 3.1 PCIe 5.1 1000W Power Supply – 80+ Gold Efficiency, Native 12V-2x6 Connector - $139.99. PSU.
I have 2 of these. They work great. No problem powering RTX 5090. The newer one I got even have cable combs on 24pin and 12v-2x6.
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“Corsair RM1000x 1000W Power Supply” · LABS Test Report
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