CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully Modular 1000W Power Supply

Name: CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully Modular 1000W Power Supply – Low-Noise, Cybenetics Gold Efficiency, Native 12V-2x6 Connector – Black
Brand: Unbranded
SKU: B0FLGMTSRQ

Status: CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully…: Unavailable on Amazon as of 2026-10-06 22:21 UTC. SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.

🛒 Search eBay for this model

Bottom line: The CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully Modular 1000W Power: Native 12V-2x6 connector, no adapter needed for current GPUs; main trade-off: 1000W is more headroom than a mid-range single-GPU build needs.

Unavailable on Amazon as of 2026-10-06 22:21 UTC

As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →

Currently unavailable on Amazon. Not the same product — 3 in-stock alternatives:

Similar: MSI MAG A850GL PCIE5 — $109.99 on Amazon as of 2026-10-06 12:20 UTC (price may vary).

View Current Price — $109.99

Similar: CORSAIR RM750e ATX 3.1 PCIe 5.1 Ready 750W Power… — $85.48 on Amazon as of 2026-10-06 12:20 UTC (price may vary).

View Current Price — $85.48

Similar: CORSAIR RM1000x Fully Modular Low-Noise ATX… — $118.25 on Amazon as of 2026-10-06 12:20 UTC (price may vary).

View Current Price — $118.25

Original listing (currently unavailable) → Compare to similar power supplies

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-06

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. About the author →

Pros & Cons

Pros

✓ Native 12V-2x6 connector, no adapter needed for current GPUs
✓ Cybenetics Gold rated up to 91% efficiency
✓ ATX 3.1 and PCIe 5.1 compliant for GPU transient spikes
✓ 100% Japanese 105C electrolytic capacitors
✓ 140mm fluid dynamic bearing fan for low-noise cooling

Cons

✗ 1000W is more headroom than a mid-range single-GPU build needs
✗ Fully modular cabling means more connectors to seat correctly
✗ ATX form factor rules out SFF and ITX cases needing SFX
✗ Embossed cables are thicker than aftermarket flat custom sets

Manufacturer description

The CORSAIR RM1000x is a 1000W fully modular ATX 3.1 power supply built for current-generation GPUs that pull hard, fast transient spikes. Its native 12V-2x6 connector runs straight from the PSU to your graphics card, so there is no adapter dangling behind the card and no daisy-chained 8-pin conversion to worry about. Cybenetics Gold certification puts efficiency at up to 91%, which means less waste heat inside the case and a quieter room during long sessions. Corsair pairs that with 100% Japanese 105C-rated electrolytic capacitors and a 140mm fluid dynamic bearing fan for low-noise cooling…

SpecPicks Verdict

SpecPicks scored CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully Modular 1000W Power… using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. Compare with similarly-priced alternatives in the power supplies category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Does the RM1000x include a 12V-2x6 cable for a 5090 or 4090?

Yes. Corsair lists a native 12V-2x6 connector that runs directly from the PSU to the GPU, so no 8-pin adapter is required.

Is 1000W enough for a high-end gaming build?

1000W covers a single flagship GPU plus a high-core-count CPU with headroom. Add your components' rated draw and compare against the 1000W total before buying.

What warranty does Corsair provide on the RM1000x?

Corsair backs the RMx series with a ten-year warranty. Check the product listing for current terms and registration requirements in your region.

How efficient is this power supply?

It is Cybenetics Gold-certified and rated for up to 91% efficiency, which lowers waste heat and fan noise compared with lower-tier units.

Key Features

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.

Full Specifications

Brand	Corsair
Color	Black
Wattage	1000 watts
Model Name	RM1000x
Unit Count	1 Count
Form Factor	ATX
Model Number	CP-9020271-NA/AM
Fully Modular	Reliable and efficient low-noise power supply with fully modular cabling, so you only have to connect the cables your system needs.
Connector Type	ATX
Cooling Method	Air
Number of Fans	1
Output Wattage	1000 watts
Item Dimensions	2.3 x 3.39 x 5.91 inches
Mfr Part Number	CP-9020271-NA/AM
ATX 3.1 Compliant	Compliant with the ATX 3.1 power standard from Intel, supporting PCIe 5.1 and resisting transient power spikes.
Compatible Devices	Monitor
Power Supply Design	Full Modular
Warranty Description	10 Year Manufacturer
Maximum Input Voltage	120 volts_of_alternating_current
Minimum Input Voltage	120 volts_of_alternating_current
Full listing title	CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully Modular 1000W Power Supply – Low-Noise, Cybenetics Gold Efficiency, Native 12V-2x6 Connector – Black

Ready to buy?

CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully Modular 1000W Power Supply – Low-Noise, Cybenetics Gold Efficiency, Native 12V-2x6 Connector – Black is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Check price on Amazon →