Skip to main content
CORSAIR RM1000x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2x6 Connector – Black

CORSAIR RM1000x Fully Modular Low-Noise ATX Power Supply

Bottom line: The CORSAIR RM1000x Fully Modular Low-Noise ATX Power Supply ($179.99 on Amazon as of 2026-10-31 12:20 UTC): Native 12V-2x6 cable runs PSU to GPU directly, no adapter needed; main trade-off: gold tier, not Platinum or Titanium, so efficiency trails top-tier units.

$179.99 on Amazon, checked (price may vary)

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

Buy on Amazon — $179.99 Compare to similar power supplies & cables

Complete build that uses this part: Dual Radeon AI PRO R9700 Workstation: 64 GB Local LLM Build (PSU) — see the full parts list for the rest of the build.

This part is in Dual Radeon AI PRO R9700 Workstation: 64 GB Local LLM Build: $3,002.39 for 5 of 6 parts, including this part (GPU (×2) not included — no current Amazon price; case not in this list — add your own), at Amazon prices checked or later (price may vary). 🛒 Add the 5 priced parts to Amazon cart

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-31. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Native 12V-2x6 cable runs PSU to GPU directly, no adapter needed
  • ✓ ATX 3.1 compliant with PCIe 5.1 support for GPU transient spikes
  • ✓ Cybenetics Gold certified, rated up to 91% efficiency
  • ✓ 100% Japanese 105°C-rated electrolytic capacitors
  • ✓ Ten-year warranty plus a low-noise 140mm FDB fan

Cons

  • ✗ Gold tier, not Platinum or Titanium, so efficiency trails top-tier units
  • ✗ Far more capacity than a low-power or retro build will ever draw
  • ✗ ATX unit, not usable in AT-era retro PCs without an adapter
  • ✗ Fan curve and zero-RPM behavior not specified in the listing

Manufacturer description

The CORSAIR RM1000x is a fully modular ATX power supply for modern high-end GPU builds. It meets the Intel ATX 3.1 standard and supports PCIe 5.1, so it is designed to handle the short power spikes that current graphics cards produce. A native 12V-2x6 connector runs straight from the PSU to your GPU, so you don't need an adapter or a bundle of 8-pin cables. Efficiency is rated Cybenetics Gold, at up to 91%. That means less wasted power, less heat inside your case and less work for the cooling. A 140mm fluid dynamic bearing (FDB) fan keeps noise low. Inside, Corsair uses 100% Japanese…

Related Products

Other products in this category you may like:

SpecPicks Verdict

SpecPicks scored CORSAIR RM1000x Fully Modular Low-Noise ATX Power Supply using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies & cables category. Compare with similarly-priced alternatives in the power supplies & cables 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 & cables 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 Corsair RM1000x work with RTX 40 and RTX 50 series graphics cards?

Yes. It has a native 12V-2x6 connector that runs directly from the PSU to the GPU with no adapter. It is also ATX 3.1 compliant with PCIe 5.1 support, the standard current high-power cards are designed around.

Is the RM1000x fully modular?

Yes. Every cable is detachable, so you connect only what your system needs. The cables are embossed, very flexible, and come with low-profile combs for routing.

How efficient is the Corsair RM1000x?

It is Cybenetics Gold certified and rated for up to 91% efficiency. That reduces wasted power and heat, which helps keep the fan quiet.

How loud is the RM1000x under load?

Corsair builds it for low-noise operation with a 140mm fluid dynamic bearing (FDB) fan. The listing does not give decibel figures or a fan-off threshold, so check Corsair's product page for acoustic specs.

What warranty comes with the Corsair RM1000x?

The RMx Series is backed by a ten-year warranty. Check Corsair's current warranty terms for registration and claim details.

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

BrandCorsair
ColorBlack
Wattage1000 watts
Model NameRMx
Form FactorInternal
Model NumberCP-9020271-NA
Fully ModularReliable and efficient low-noise power supply with fully modular cabling, so you only have to connect the cables your system needs.
Built-In MediaItem
Connector TypeATX
Cooling MethodAir
Number of Fans1
Output Wattage1000 Watts
Item Dimensions2.3 x 3.39 x 5.91 inches
Mfr Part NumberCP-9020271-NA
ATX 3.1 CompliantCompliant with the ATX 3.1 power standard from Intel, supporting PCIe 5.1 and resisting transient power spikes.
Compatible DevicesMonitor
Power Supply DesignFull Modular
Warranty Description10 Year Manufacturer
Maximum Input Voltage240 Volts (AC)
Minimum Input Voltage100 Volts (AC)
Full listing titleCORSAIR RM1000x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2x6 Connector – Black

Hardware benchmark data

Ready to buy?

CORSAIR RM1000x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – 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.

Buy on Amazon — $179.99

*Price sourced from Amazon.com. Last updated 2026-10-31. Price and availability subject to change.

Related Power Supplies & Cables

Keep exploring SpecPicks

Other buying guides

Browse the catalog

Editorial

More guides & deep dives from the SpecPicks archive

Browse all articles & guides →

More reviews from the SpecPicks archive

Browse all reviews →

Earliest SpecPicks reviews

Browse full archive →
CORSAIR RM1000x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2x6 Connector – Black
$179.99
View on Amazon →