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CORSAIR RM1000x Fully Modular ATX Power Supply - 80 Plus Gold - Low-Noise Fan - Zero RPM - Black

  • Based on 3,414 reviews
Condition: Used - Like New
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Style: RMx (2021)


Size: 1000W


Features

  • Fully Modular: Only connect the cables your system needs, making clean and tidy builds easier.
  • 135mm Magnetic Levitation Fan: Utilizes a magnetic levitation bearing and custom engineered rotors for high performance, low noise, and superior reliability.
  • EPS12V Connector: For wide compatibility with modern graphics cards and motherboards.
  • 100% All Japanese 105C Capacitors: Premium internal components ensure unwavering power delivery and long-term reliability.
  • Modern Standby Compatible: Extremely fast wake-from-sleep times and better low-load efficiency.
  • 80 PLUS Gold Certified: High efficiency operation for lower power consumption, less noise, and cooler temperatures.

Description

CORSAIR RM1000x Series fully modular power supplies with EPS12V connectors are built with the highest quality components to deliver 80 PLUS Gold efficient power to your PC. RM1000x PSUs use only Japanese 105°C capacitors, for long life and reliability backed by a ten-year warranty. A 135mm magnetic levitation bearing fan ensures high performance coupled with low noise.

Model Name: RM1000x


Brand: Corsair


Compatible Devices: Personal Computer


Connector Type: ATX


Output Wattage: 1000 Watts


Form Factor: ATX


Wattage: 850 watts


Cooling Method: Air


Item dimensions L x W x H: 7.09 x 5.91 x 3.39 inches


Item Weight: 2 Kilograms


Compatible Devices: Personal Computer


Connector Type Used on Cable: ATX


Output Wattage: 1000 Watts


Form Factor: ATX


Wattage: 850 watts


Cooling Method: Air


Power Supply Design: Full Modular


Number of Fans: 1


Fan Size: 135 Millimeters


Maximum Input Voltage: 240 Volts (AC)


Minimum Input Voltage: 100 Volts (AC)


System Bus Connector Type: 24 Pin


Item Dimensions: 7.09 x 5.91 x 3.39 inches


Item Weight: 2 Kilograms


Model Name: RM1000x


Brand: Corsair


Manufacturer: Corsair


UPC: 840006603559


Global Trade Identification Number: 59


Mfr Part Number: CP-9020201-NA


Model Number: CP-9020201-NA


Warranty Description: 10 year manufacturer


Unit Count: 1.0 Count


Frequently asked questions

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View our full returns policy here.

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Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.


The Corsair RM850x fully modular power supply unit (PSU) has been praised for its excellent efficiency and silent operation, with notable features including an impressive low-noise fan, exceptional power delivery, and a great build quality. One unique factor to consider, however, is the design of its shift model, specifically suited for side-mounted PSU slots; this may not be compatible with some cases and can present wiring and heat dissipation challenges.

Pros

  • 👍 High-quality build, solid, and durable
  • 🌟 Excellent power efficiency and power delivery
  • 🔇 Very quiet operation, with Zero RPM fan mode
  • ⚙️ Great modularity allowing for easy cable management

Cons

  • ⚠️ May not fit into smaller PC cases because of its size
  • 🔄 In the Shift model, side out connector may not be intuitive for some setups
  • 💼 The Shift model might cause some spacing issues in narrower cases
  • ⚡ Potential heat dissipation challenges due to wiring placement (again in Shift model)

Should I Buy It?

If you're seeking a high-quality, highly efficient PSU that offers seamless and quiet operation, the Corsair RM850x undoubtedly fits the bill. However, be mindful of whether the fully modular design suits your particular PC case and setup. If you're considering the Shift model, ensure that it fits with the space and wiring layout of your case. Overall, this PSU is certainly a worthwhile investment for tech-savvy users and gamers.


  • Top-tier internal components, Platinum-certified, Stable Top-tier internal components, Platinum-certified, Stable
Style: RMx (2024) - ATX 3.1 Size: 1000W
Excellent power supply. I previously had a 2017 RM850x with very thick cables that were a nightmare to manage. Now, 9 years later, I’ve upgraded to this RM1000x, which has very flexible and easy-to-route cables. Surprisingly, I received a Platinum-certified unit instead of the Gold one! This PSU stands out for its top-tier internal components (excellent element base). It’s dead silent, runs stably, and shows no voltage drops. The only downside is that it only comes with 2 cable combs ... show more
Reviewed in the United States on February 23, 2026 Reviewed in the United States on February 23, 2026 by Yulian Orlov

  • With great power comes great peformance
Style: RMx (2024) - ATX 3.1 Size: 1000W
It's a great power supply. Modular and not too big of a unit. I'm using to to power an Intel 14900K CPU and Geforce RTX 5080 GPU. It also powers a handful of peripherals. It does the job with plenty of power to spare. I especially appreciate the native 16pin GPU connector. Don't hesitate and just buy it. You won't regret it. ... show more
Reviewed in the United States on May 3, 2026 by Scott H.

  • Nice cables and low noise
Style: RMx (2024) - ATX 3.1 Size: 1000W
Only owned this power supply for about 3 days but I really like it. its quiet and I really like the cables. I also own the 750watt version and the cables seem way cheaper and harder to work with. while this unit has each wire sleeved individually the whole cable is sleeved in the 750 watt version making it hard to bend and do any wire management. i mostly got this powersupply because i bought a used 3080 that needs 3 pcie for its power and my motherboard also requires 3 aswell. 2 for the cpu and one for the board itself. this is a very good power supply if your kind of still wanting to use your old pc parts with a new power hungry motherboard/cpu while also still has a new 12V-2x6 port/cable. very happy. if the power supply fails or something else ill do a edit and update this review. ... show more
Reviewed in the United States on April 29, 2026 by arron b.

  • Great quality!
Style: RMx (2024) - ATX 3.1 Size: 1000W
Works great! Plug and play with a RTX 5080
Reviewed in the United States on July 1, 2026 by Brandon

  • A winner
Style: RMx (2021) Size: 1000W
Solid performance, high quality
Reviewed in the United States on July 2, 2026 by Amazon Customer

  • Fantastic Worry Free PSU! Fantastic Worry Free PSU!
Style: RMx (2024) - ATX 3.1 Size: 1000W
So far so great! I was having some issues with my new graphics card failing and after some research realized I needed to upgrade my PSU. This one was at a great price and was probably more power than I technically needed, but after installing it out works great and my video card doesn't crash anymore. I also like that this PSU has a dial to turn up or down the fan speed manually if I choose or let the fan operate on its own. On it's own it's super quiet, I would even say silent most of the time. The cables that came with it were long enough that I could hook them in outside if the PC Case. If I had one little complaint, it would be on the cables themselves, they could use better indication for what they are or plug into. Very satisfied so far with this product! ... show more
Reviewed in the United States on June 14, 2026 Reviewed in the United States on June 14, 2026 by Andy D.

  • Great PSU
Style: RMx (2024) - ATX 3.1 Size: 1000W
Had to RMA a Seasonic Focus PSU because I now know that it couldn't handle the transient spikes of my 9070xt. Frequent driver crashes, resets. Thought it was my GPU. Decided to go back to Corsair as my previous PSU from this brand never failed me and I couldn't be happier. Any issue I previously had has completely disappeared with the 2024 model of the RM1000x. Really appreciate the 4 PCIe cables, as I already needed one for the iCue link hub and it still leaves room for a future upgrade. ... show more
Reviewed in the United States on February 2, 2026 by JAA

  • Clean power, no issues
Style: RMx (2024) - ATX 3.1 Size: 1000W
Great power supply. Had all the right connectors for a new z890 motherboard and 5080 GPU.
Reviewed in the United States on May 17, 2026 by DIY Guy

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