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Corsair

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

  • Based on 295 reviews
Condition: Used - Very Good
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Arrives Wednesday, Oct 21
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Style: RMx (2024) - ATX 3.1


Size: 1000W


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.

Description

CORSAIR RMx Series Fully Modular Low-Noise Power Supplies deliver quiet, dependable power with Cybenetics Gold efficiency to your PC. Fully modular, ultra-flexible embossed cables make PC builds easy, as you connect only the cables your system requires. Compliant with the ATX 3.1 power standard from Intel®, RMx PSUs have the connections needed to power today’s demanding PC hardware including a native 12V-2x6 connector. 100% Japanese 105°C-rated electrolytic capacitors deliver fantastic electrical performance, while a 140mm FDB fan provides low noise cooling. Backed by a ten-year warranty, RMx PSUs are the gold standard for many years to come.

Model Name: RM1000x


Brand: Corsair


Compatible Devices: Monitor


Connector Type: ATX


Output Wattage: 1000 watts


Form Factor: ATX


Wattage: 1000 watts


Cooling Method: Air


Item dimensions L x W x H: 2.3 x 3.39 x 5.91 inches


Item Weight: 6.9 pounds


Compatible Devices: Monitor


Connector Type Used on Cable: ATX


Output Wattage: 1000 watts


Form Factor: ATX


Wattage: 1000 watts


Cooling Method: Air


Power Supply Design: Full Modular


Number of Fans: 1


Maximum Input Voltage: 120 volts_of_alternating_current


Minimum Input Voltage: 120 volts_of_alternating_current


System Bus Connector Type: ATX


Item Dimensions: 2.3 x 3.39 x 5.91 inches


Item Weight: 6.9 pounds


Model Name: RM1000x


Brand: Corsair


Number of Items: 1


Unit Count: 1 Count


Manufacturer: Corsair


UPC: 840440415190


Model Number: CP-9020271-NA/AM


Mfr Part Number: CP-9020271-NA/AM


Warranty Description: 10 Year Manufacturer


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Oct 21

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Absolute rock-solid power, great price, and easy cable management!
Style: RMx (2024) - ATX 3.1 Size: 1000W
I picked up the Corsair RM1000x at a great price to handle some serious hardware demands, and it has been an absolute champion. This unit has seamlessly powered both my previous power-hungry RTX 3090 and my current RTX 5080 without a single hitch or power instability issue. It handles transient power spikes like a breeze, thanks to the updated ATX 3.1 and PCIe 5.1 standards. Installation was incredibly smooth. The flexible, modular cables are designed beautifully and fit extremely easy right into the back and shroud of my Cooler Master H500 case. Even with a large mid-tower setup, routing everything neatly took no effort at all. One of the biggest unsung perks of this unit is its compatibility with a simulated sine wave. Many high-end modern PSUs with tight Active PFC can be incredibly finicky and trip or shut down when a UPS switches to a simulated/stepped sine wave battery backup. This Corsair PSU handles it gracefully, giving me total peace of mind during quick power blips. It operates near-silently, offers flawless power delivery, and provides incredible value for the performance. If you need a reliable 1000W foundation for flagship-tier hardware, this is an excellent device that I highly recommend. ... show more
Reviewed in the United States on July 22, 2026 by Lantorax
    • Fantastic Worry Free PSU!
Style: RMx (2024) - ATX 3.1 Size: 1000W
Review Image by Andy D.
Review Image by Andy D.
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 by Andy D.
    • Great PSU.
Style: RMx (2024) - ATX 3.1 Size: 1000W
Upgraded from a Corsair 650 RMe to this for stability with my RTX 5060Ti as I was a bit worried about power spikes in some of my games. This PSU has a fan switch (I leave it set to off), the fan will still come on if the PSU gets hot but that has not happened yet. Gone are the days of whirring fans on PSUs that's a win right there. I had no issues installing it and the modular cables are the same as the 650 RMe so no need to change them out. Although I did swap out the GPU cable out of caution. All in all it does the job and does it quietly, which is nice. Recommended, would buy again. ... show more
Reviewed in the United States on August 6, 2026 by Amazon Customer
    • Great, individually-sleeved cables.
Style: RMx (2024) - ATX 3.1 Size: 1000W
I am told by web sites I trust that this is a reliable power supply, and I've been using Corsair power supplies for years without problems. This model has individually-sleeved cables which look great and are easy to manage. This model supports three pciE cables for high power AMD video cards (I'm not willing to risk melting my video card with a 12-volt high power connector), so I'll stick with this model. ... show more
Reviewed in the United States on July 29, 2026 by Howard
    • Great unit
Style: RMx (2024) - ATX 3.1 Size: 1000W
Great power unit, very quiet with a 4060 as it doesn’t draw much power and good value as it’s a better tier unit. Easy to connect.
Reviewed in the United States on July 26, 2026 by Merin
    • Great PSU. Definitely recommend.
Style: RMx (2024) - ATX 3.1 Size: 1000W
This is the perfect PSU. I bought this to power my 9070xt/9850x3d build and it works flawlessly. There are plenty of 8-pin PCIE cables to power my 9070xt, which needs 3, and a fourth for to power my iCue hub. This is a great buy for a high end system.
Reviewed in the United States on August 11, 2026 by Michael K
    • So far great
Style: RMx (2024) - ATX 3.1 Size: 1000W
So far I've been very happy with this product. As long as it doesn't fry my setup this will stay five star review. It does have a fan controller that I don't use and it works just fine without messing with it. It's powering my RTX 4090 and one thing I like about it, it natively runs power with that dreadful 12VHPWR cable without the use of an adapter. The power supply I had before had to use an adapter and I switched to this because of concerns with it in the history of the connection burning up. That may have nothing to do with it, but I figure since this one part has the ability to fry a machine worth thousands of dollars especially with today's prices, it is worth the money to get a quality PSU. ... show more
Reviewed in the United States on May 31, 2026 by Great book for children!
    • Great product, vender questionable.
Style: RMx (2024) - ATX 3.1 Size: 1000W
Review Image by Amazon Customer
Review Image by Amazon Customer
Review Image by Amazon Customer
Product itself is fine. I have purchased a dozen of them in my life and will continue to do so. This particular vender sent an obviously used and returned product. Cables were unwound, twist ties were off and loose in the bottom of the box, manual was creased and folded, interior packaging missing. I highly recommend this power supply, but do not use this vender. I’m not basing a $3000 build off of a power supply someone else deemed returnable, or some vender felt they could refurbish. ... show more
Reviewed in the United States on April 29, 2026 by Amazon Customer

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