# Corsair RM1000x 1000W ATX 3.1 Power Supply

Corsair RM1000x is a 1000W internal power supply with fully modular cables, ATX 3.1 compliance and a native 12V-2x6 connector. Its listed efficiency certification and cable setup may suit a PC build where modern GPU power connections and tidy wiring matter.

- [Original product page](https://best-deals.pro/product/corsair-rm1000x-1000w-atx-3-1-power-supply)
- [View offer](https://best-deals.pro/visit/corsair-rm1000x-1000w-atx-3-1-power-supply)
- Market: US
- Language: en-US
- Currency: USD
- Brand: Corsair
- Model: RMx
- Category: Computers > Computer Components > Power Supplies
- Price: 164.99 USD
- Previous price: 209.99 USD
- Discount: 21%
- Price checked: 2026-11-14T06:14:52.124Z
- Rating: 4.5 / 5
- Reviews: 813

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Fully modular cables let builders connect only the leads their system uses.
- A native 12V-2x6 connector is listed for direct GPU-to-PSU connection without an adapter.
- The listing states ATX 3.1 compliance and PCIe 5.1 support.
- The manufacturer claims Cybenetics Gold certification and up to 91% efficiency.
- Embossed, flexible cables and low-profile combs are described as installation aids.

## Pros

- Fully modular cabling can reduce unused leads inside a build.
- Native 12V-2x6 connection can simplify cabling for compatible graphics cards.
- The manufacturer states a ten-year warranty.

## Specifications

### Identity and output
- Brand: Corsair
- Model: RMx
- Output wattage: 1000 watts
- Connector type: ATX
- Form factor: Internal
- Cooling method: Air
- Fan count: 1
- Current rating: 25 A
### Standards and cabling
- Power supply design: Full Modular
- Compliance: ATX 3.1 compliant with PCIe 5.1 support
- GPU power connector: Native 12V-2x6 connector
### Dimensions and installation
- Dimensions listed: 2.3 x 3.39 x 5.91 inches
- Weight listed: 6.9 pounds
### Manufacturer claims
- Warranty description: 10 Year Manufacturer

## Before you buy

- The listed dimensions are 2.3 x 3.39 x 5.91 inches, so compare them with the case's PSU clearance before buying. The manufacturer describes a 140mm FDB fan, while the specifications also list one fan without giving its size. Customer feedback reports mixed durability and motherboard compatibility, so confirm fit for the exact system and review warranty terms.

## A good fit for

- PC builders seeking a 1000W fully modular PSU with ATX 3.1 and a native 12V-2x6 connection.
- Builders who want to connect only the power cables their system needs.

## Less suited to

- Buyers whose case or system requires a different PSU size or connector arrangement.
- Buyers who need assured compatibility with a particular motherboard without checking its requirements.

## Customer feedback

Customer feedback highlights quiet operation, cable management and power quality, with some buyers also praising efficiency at low loads. Those impressions are relevant to a modular 1000W unit advertised with flexible cables and efficiency certification, but they do not establish performance for every build. Feedback on durability and motherboard compatibility is mixed, so buyers should confirm system fit and weigh the reported reliability concerns.
- Positive themes: Customers describe operation as quiet, including reports of an inaudible fan.
- Positive themes: Customers appreciate the modular cable arrangement and power quality.
- Mixed feedback: Durability feedback ranges from reports of a robust unit to reports of failure within 1.5 years.
- Mixed feedback: Compatibility feedback varies, including reports that it does not work with every motherboard.

## Frequently asked questions

### Is the Corsair RM1000x fully modular?
Yes. The listing describes it as fully modular, with cables connected as needed.
### Does it have a native 12V-2x6 connector?
Yes. The listing claims a native 12V-2x6 connector for direct connection to compatible graphics cards.
### What efficiency certification is stated?
The listing claims Cybenetics Gold certification and says it is rated for up to 91% efficiency. These are manufacturer claims, not independent measurements here.
### What should I check before installation?
Check that the listed dimensions fit your case and that the PSU and cable connections match your motherboard and other components.

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## Add-ons

- [AMD RYZEN 7 9800X3D 8-Core, 16-Thread Desktop Processor](https://best-deals.pro/visit/corsair-rm1000x-1000w-atx-3-1-power-supply)
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## Images

![Corsair RM1000x 1000W ATX 3.1 Power Supply — 1](https://best-deals.pro/i/wzbeLROqh6GqERzFkl-QgWLOxZln9AvVgIphMrSdfkGX_L0_b2kKoGgBVcgwzVYUXC-kbd_A7HYb6s5-oKKCeodNkbJpefbflKrSQs8KDxvEiL6q_BdVQmrw.jpg)

![Corsair RM1000x 1000W ATX 3.1 Power Supply — 2](https://best-deals.pro/i/0RtWUiJwUmq14_wnTgOEhDBs-yP1OqDB74rQ4oTLkWY_TXIhIlmGNsuMRfErhfRjd-cQV9NFiDLt38KKTP9dh63whGTTkxx9JJdI1M41bLtDdfWTUJhKLlf_.jpg)

![Corsair RM1000x 1000W ATX 3.1 Power Supply — 3](https://best-deals.pro/i/MwKnCOmBoFOXX8mIHyR9swP4l9iQSu4FurwwYPyS07ta0jraiS4qlJdXjaz9-EvZIrmr2fvgkcR9jZRzaFCv582551fWxZhu29s1XGrlNDQ3U0008th1TA_y.jpg)

![Corsair RM1000x 1000W ATX 3.1 Power Supply — 4](https://best-deals.pro/i/vvii3oUZ8ve300Z6qpKIpAzyQu8qqINigIMoj12_oPycNOpKH2_SjXPq6Awm04q67lcEFlhzUQR9H91rkZHbbdKkMS5FTpcj81Bt9tLHi9gSmoOLyrRPBkHt.jpg)

![Corsair RM1000x 1000W ATX 3.1 Power Supply — 5](https://best-deals.pro/i/9abZOn4n4UGgfhx8xVu0IQ44pMZ1qTob92YnFaY02qcDf_v_Y7iG23wdMyGxiFZJkPpL50JcvqX4WaJ5sB2l-gWFOrstv4sXyMdtewtpFk__QogoKFZgf_D_.jpg)

![Corsair RM1000x 1000W ATX 3.1 Power Supply — 6](https://best-deals.pro/i/uLGXpMFUMbFbd_PUWQaiHYU_njoswNBT4m8_Fa18zf88TrvrxBHxXEHaWCkRAM2ooPkX4T4uJghMT8b85dLbQ-qDpyO2eM3ltmWVP1Ris8zTOSZNdzvqEC9R.jpg)

![Corsair RM1000x 1000W ATX 3.1 Power Supply — 7](https://best-deals.pro/i/OI4iyFJ6OTGMwANWWRa_b2ZALplRVfx9M7EekZ-hoO-HOM5vs24O-KEGw-SGJ0HUQvzzy3p4Q2RB_4_BjE__DVAo4EDsnPMLi6stC1GTg5W7iYbA3GVT3xsA.jpg)