---
product_id: 662797448
title: "RM1000x ATX 3.1 PCIe 5.1 1000W Power Supply – Black"
brand: "corsair"
price: "R9044"
currency: ZAR
in_stock: true
reviews_count: 13
category: "Corsair"
url: https://www.desertcart.co.za/products/662797448-rm1000x-atx-3-1-pcie-5-1-1000w-power-supply
store_origin: ZA
region: South Africa
---

# 1000W peak power Fully modular cabling 10-year warranty RM1000x ATX 3.1 PCIe 5.1 1000W Power Supply – Black

**Brand:** corsair
**Price:** R9044
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up like a pro—quiet, clean, and future-ready.

## Quick Answers

- **What is this?** RM1000x ATX 3.1 PCIe 5.1 1000W Power Supply – Black by corsair
- **How much does it cost?** R9044 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/662797448-rm1000x-atx-3-1-pcie-5-1-1000w-power-supply)

## Best For

- corsair enthusiasts

## Why This Product

- Trusted corsair brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Premium 105°C Japanese capacitors and a decade-long warranty ensure your investment powers on for years.
- • **Next-Gen Ready:** ATX 3.1 & PCIe 5.1 compliant with native 12V-2x6 GPU connector—future-proof your build effortlessly.
- • **Power Your Ambition:** 1000W of clean, reliable power to fuel your high-performance rig without compromise.
- • **Tailored Connectivity:** Fully modular design means you only plug in what you need—streamlined, clutter-free, and ultra-flexible.
- • **Whisper-Quiet Efficiency:** Cybenetics Gold 91% efficiency and a 140mm FDB fan keep noise low and temps cooler for marathon sessions.

## Overview

The CORSAIR RM1000x is a fully modular 1000W power supply designed for high-end PC builds. It meets Intel's ATX 3.1 standard and supports PCIe 5.1 with a native 12V-2x6 GPU connector, delivering up to 91% efficiency certified by Cybenetics Gold. Featuring ultra-flexible embossed cables, a quiet 140mm FDB fan, and premium 105°C Japanese capacitors, it ensures stable, low-noise power delivery. Backed by a 10-year warranty, it’s engineered for durability and future-proof performance.

## 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.

Review: Seems stable and has nicely sheathed cables - My last PSU was an EVGA 750w that has lasted 10+ years, and still going strong through multiple builds. When I built a new system recently I figured I'd get ahead a bit and purchase another with a bit of headroom. There are a lot of options now and I saw that this particular psu was well recommended. It's been a few days now and it seems perfectly stable. It's actually smaller in dimensions than my old evga, fits well in a Silverstone GD11 case. The modularity is a must to me but I wasn't expecting the cables to be individually sheathed like they are. They look really nice in the case and are easily manipulated into a position out of the way. I can tell thing gets flooded with power as it turns on as all my lights dim but after that initial dump, it's good. Only time can really tell with these units but at the moment I'm happy I went with Corsairs RMx series.
Review: The RM1000x is an excellent PSU with individually sleeved cables. - I bought this Corsair RM1000x ATX 3.1 (2024) PSU to replace a faulty ASRock PSU. As one other review mentioned, the Cybenetics rating on the box for power efficiency has been recently updated from Gold to Platinum, which will help keep long term energy costs down for people who live in areas with expensive electricity. When unboxed, the power supply feels and looks like a premium product, and indeed it is. The modular cables in the box all come with individually sleeved wires, and the 12V 2x6 connector and ATX 24 pin connectors come with clamshell style cable combs preinstalled, which seems to be a newer development with this unit. I looked at multiple tech site reviews of this power supply and the only one with cable combs I found was the Kit Guru review, and those were manually installable traditional style combs. The cables did have a bit of a petrochemical smell to them, but it was far better than the ASRock unit I replaced. The cables on the RM1000x are also longer and more flexible than on the ASRock unit, making routing in my mid-tower case easier, specifically for the CPU (length) and ATX 24 pin (flexibility). The power supply performs exceptionally well, making absolutely no coil whine noise at any load, and works completely silently at loads below 500 watts. The fan control knob on the back of the unit comes out of the box set to 0 RPM low noise mode, leaving the fan off until the aforementioned 500 watt limit is exceeded. If you don't care about 0 RPM low noise mode, you can adjust the knob clockwise until it clicks, at which point you're manually controlling the fan, allowing you to set a constant fan speed anywhere in the fans RPM range. One thing to note is that the 12V 2x6 connector that comes in the box only has 2 of the four sense pins, but this is totally fine, as it powers my RTX 5080 without issue, so don't be concerned that two sense wires are "missing". I was extremely lucky to get this unit at a cheaper price only a day before it raised to its current price, but even around the $200 mark, this power supply is worth the price. Overall I give this power supply a 9/10, and only because I don't like that the fan is gray instead of black, which honestly is likely a complete non-issue for most people.

## 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DJ1M9C62 |
| Best Sellers Rank | #7 in Computer Power Supplies |
| Brand | Corsair |
| Built-In Media | Item |
| Compatible Devices | Monitor |
| Connector Type | ATX |
| Connector Type Used on Cable | ATX |
| Cooling Method | Air |
| Current Rating | 25 A |
| Customer Reviews | 4.5 out of 5 stars 773 Reviews |
| Form Factor | Internal |
| Item Dimensions | 2.3 x 3.39 x 5.91 inches |
| Item Highlight | Native 12V-2x6 Connector, Fully Modular, Low-Noise, Cybenetics Gold, NA |
| Item Weight | 6.9 pounds |
| Manufacturer | Corsair |
| Maximum Input Voltage | 240 volts_of_alternating_current |
| Mfr Part Number | CP-9020271-NA |
| Minimum Input Voltage | 100 volts_of_alternating_current |
| Model Name | RMx |
| Model Number | CP-9020271-NA |
| Number of Fans | 1 |
| Number of Items | 1 |
| Output Wattage | 1000 watts |
| Power Supply Design | Full Modular |
| System Bus Connector Type | ATX |
| UPC | 840006667698 |
| Warranty Description | 10 Year Manufacturer |
| Wattage | 1000 watts |

## Product Details

- **Brand:** Corsair
- **Compatible Devices:** Monitor
- **Connector Type:** ATX
- **Cooling Method:** Air
- **Form Factor:** Internal
- **Item Weight:** 6.9 pounds
- **Item dimensions L x W x H:** 2.3 x 3.39 x 5.91 inches
- **Model Name:** RMx
- **Output Wattage:** 1000 watts
- **Wattage:** 1000 watts

## Images

![RM1000x ATX 3.1 PCIe 5.1 1000W Power Supply – Black - Image 1](https://m.media-amazon.com/images/I/71K5YbKrcYL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Seems stable and has nicely sheathed cables
*by B***K on August 13, 2026*

My last PSU was an EVGA 750w that has lasted 10+ years, and still going strong through multiple builds. When I built a new system recently I figured I'd get ahead a bit and purchase another with a bit of headroom. There are a lot of options now and I saw that this particular psu was well recommended. It's been a few days now and it seems perfectly stable. It's actually smaller in dimensions than my old evga, fits well in a Silverstone GD11 case. The modularity is a must to me but I wasn't expecting the cables to be individually sheathed like they are. They look really nice in the case and are easily manipulated into a position out of the way. I can tell thing gets flooded with power as it turns on as all my lights dim but after that initial dump, it's good. Only time can really tell with these units but at the moment I'm happy I went with Corsairs RMx series.

### ⭐⭐⭐⭐⭐ The RM1000x is an excellent PSU with individually sleeved cables.
*by M***A on May 31, 2025*

I bought this Corsair RM1000x ATX 3.1 (2024) PSU to replace a faulty ASRock PSU. As one other review mentioned, the Cybenetics rating on the box for power efficiency has been recently updated from Gold to Platinum, which will help keep long term energy costs down for people who live in areas with expensive electricity. When unboxed, the power supply feels and looks like a premium product, and indeed it is. The modular cables in the box all come with individually sleeved wires, and the 12V 2x6 connector and ATX 24 pin connectors come with clamshell style cable combs preinstalled, which seems to be a newer development with this unit. I looked at multiple tech site reviews of this power supply and the only one with cable combs I found was the Kit Guru review, and those were manually installable traditional style combs. The cables did have a bit of a petrochemical smell to them, but it was far better than the ASRock unit I replaced. The cables on the RM1000x are also longer and more flexible than on the ASRock unit, making routing in my mid-tower case easier, specifically for the CPU (length) and ATX 24 pin (flexibility). The power supply performs exceptionally well, making absolutely no coil whine noise at any load, and works completely silently at loads below 500 watts. The fan control knob on the back of the unit comes out of the box set to 0 RPM low noise mode, leaving the fan off until the aforementioned 500 watt limit is exceeded. If you don't care about 0 RPM low noise mode, you can adjust the knob clockwise until it clicks, at which point you're manually controlling the fan, allowing you to set a constant fan speed anywhere in the fans RPM range. One thing to note is that the 12V 2x6 connector that comes in the box only has 2 of the four sense pins, but this is totally fine, as it powers my RTX 5080 without issue, so don't be concerned that two sense wires are "missing". I was extremely lucky to get this unit at a cheaper price only a day before it raised to its current price, but even around the $200 mark, this power supply is worth the price. Overall I give this power supply a 9/10, and only because I don't like that the fan is gray instead of black, which honestly is likely a complete non-issue for most people.

### ⭐⭐⭐⭐⭐ Premium Quality
*by A***K on September 16, 2026*

Best premium quality cables I’ve ever seen , setting up was also easy!

## Frequently Bought Together

- 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
- Samsung 990 PRO SSD NVMe M.2 PCIe Gen4, M.2 2280 Internal Solid State Hard Drive, Seq. Read Speeds Up to 7,450 MB/s for High End Computing, Gaming, and Heavy Duty Workstations, MZ-V9P2T0B/AM
- AMD RYZEN 7 9800X3D 8-Core, 16-Thread Desktop Processor

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.za/products/662797448-rm1000x-atx-3-1-pcie-5-1-1000w-power-supply](https://www.desertcart.co.za/products/662797448-rm1000x-atx-3-1-pcie-5-1-1000w-power-supply)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-09-27*