---
product_id: 679655809
title: "CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2x6 Connector – Black"
brand: "corsair"
price: "€ 447.18"
currency: EUR
in_stock: true
reviews_count: 5
category: "Corsair"
url: https://www.desertcart.com.cy/products/679655809-corsair-rm850x-fully-modular-low-noise-atx-power-supply-atx
store_origin: CY
region: Cyprus
---

# 850W peak power output Ultra-low noise operation Fully modular cabling CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2x6 Connector – Black

**Brand:** corsair
**Price:** € 447.18
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up quietly, build boldly.

## Quick Answers

- **What is this?** CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2x6 Connector – Black by corsair
- **How much does it cost?** € 447.18 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/679655809-corsair-rm850x-fully-modular-low-noise-atx-power-supply-atx)

## 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

- • **Next-Gen Ready:** ATX 3.1 and PCIe 5.1 compliant with native 12V-2x6 GPU connector—no adapters, no hassle.
- • **Power Your Ambition:** 850W of reliable, clean power to fuel your high-performance build without compromise.
- • **Tailored Connectivity:** Fully modular design means you only plug in what you need—streamlined, clutter-free, and future-ready.
- • **Whisper-Quiet Cooling:** 140mm fluid dynamic bearing fan keeps noise to a minimum, so your workspace stays zen.
- • **Built to Last a Decade:** Premium 105°C Japanese capacitors and a 10-year warranty ensure your investment stands the test of time.

## Overview

The CORSAIR RM850x is a fully modular, 850W ATX 3.1 compliant power supply designed for professional-grade PC builds. Featuring Cybenetics Gold efficiency (up to 91%), native 12V-2x6 GPU connectors for PCIe 5.1 compatibility, and ultra-quiet cooling with a 140mm FDB fan, it delivers reliable, low-noise power. Its premium Japanese capacitors and 10-year warranty make it a durable, future-proof choice for demanding users.

## 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: Corsair siempre sacando pecho de su calidad y productos.
Review: For as long as I've been building my own computers - more than twenty-five years now - I've used Corsair power supplies. I don't necessarily think they are better than any other brand, but they've never let me down, despite all my computers generally running 24/7 in dusty, sometimes humid, sometimes 90F environments. I purchased this not because my old Corsair supply failed, but because I was installing a 5070Ti and wanted higher output as a result - the 650W would have barely been suitable. Swapping supplies was dead simple; the old one slotted in place of my old RM650x, and all I needed to do is replace the old power cable from the RX470 with the newer 12V-2x6pin. I have all Cablemod Sleeved cables and debated replacing the the new 12-pin connector with a sleeved variant, but it's so flexible and clean looking I decided the Corsair one was just fine. I've been running for about three months now without any issue. Obviously not much time on a PSU but I doubt I'll have problems. As an aside, this one has a variable fan speed knob. So far as I can tell, if you leave it off it will just run in normal, automatic mode, whereas if you use the knob it will instead always run at a certain speed. I think, I'm not totally clear on it. I just keep the knob off - my system is already very quiet and I don't think I've ever heard the PSU fan turn on even with my old supply, much less this newer one. As my mobo doesn't support PCIe 5.1, I can't comment on that part of the component. I would definitely recommend this RM850x, and would recommend Corsair in general, so far as PSUs are concerned. They seem very solid and well-made, and I've never been disappointed by them in the past.

## 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 | B0DJ1JL3MK |
| Brand | Corsair |
| Compatible Devices | Monitor |
| Connector Type Used on Cable | ATX |
| Cooling Method | Air |
| Customer Reviews | 4.7 4.7 out of 5 stars (615) |
| Form Factor | ATX |
| Item Dimensions | 5.8 x 8.6 x 15 centimeters |
| Item Weight | 3.9 Pounds |
| Manufacturer | Corsair |
| Maximum Input Voltage | 264 Volts (AC) |
| Mfr Part Number | CP-9020270-NA |
| Minimum Input Voltage | 100 Volts (AC) |
| Model Name | RMx |
| Model Number | CP-9020270-NA |
| Output Wattage | 850 Watts |
| Power Supply Design | Full Modular |
| System Bus Connector Type | ATX |
| UPC | 840006667506 |
| Wattage | 850 watts |

## Product Details

- **Brand:** Corsair
- **Compatible devices:** Monitor
- **Connector type:** ATX
- **Model name:** RMx
- **Output wattage:** 850 Watts

## Images

![CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2x6 Connector – Black - Image 1](https://m.media-amazon.com/images/I/61eKAbgBZRL.jpg)
![CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2x6 Connector – Black - Image 2](https://m.media-amazon.com/images/I/71ugnWpH5DL.jpg)
![CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2x6 Connector – Black - Image 3](https://m.media-amazon.com/images/I/81WzZbszsQL.jpg)
![CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2x6 Connector – Black - Image 4](https://m.media-amazon.com/images/I/812LOeRvOUL.jpg)
![CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2x6 Connector – Black - Image 5](https://m.media-amazon.com/images/I/81+Mpo7pVOL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***D on 30 January 2026*

Corsair siempre sacando pecho de su calidad y productos.

### ⭐⭐⭐⭐⭐ Review
*by A***C on 12 December 2025*

For as long as I've been building my own computers - more than twenty-five years now - I've used Corsair power supplies. I don't necessarily think they are better than any other brand, but they've never let me down, despite all my computers generally running 24/7 in dusty, sometimes humid, sometimes 90F environments. I purchased this not because my old Corsair supply failed, but because I was installing a 5070Ti and wanted higher output as a result - the 650W would have barely been suitable. Swapping supplies was dead simple; the old one slotted in place of my old RM650x, and all I needed to do is replace the old power cable from the RX470 with the newer 12V-2x6pin. I have all Cablemod Sleeved cables and debated replacing the the new 12-pin connector with a sleeved variant, but it's so flexible and clean looking I decided the Corsair one was just fine. I've been running for about three months now without any issue. Obviously not much time on a PSU but I doubt I'll have problems. As an aside, this one has a variable fan speed knob. So far as I can tell, if you leave it off it will just run in normal, automatic mode, whereas if you use the knob it will instead always run at a certain speed. I think, I'm not totally clear on it. I just keep the knob off - my system is already very quiet and I don't think I've ever heard the PSU fan turn on even with my old supply, much less this newer one. As my mobo doesn't support PCIe 5.1, I can't comment on that part of the component. I would definitely recommend this RM850x, and would recommend Corsair in general, so far as PSUs are concerned. They seem very solid and well-made, and I've never been disappointed by them in the past.

### ⭐⭐⭐⭐⭐ Review
*by S***V on 17 April 2025*

If you’re building a high-end rig and eyeing a power-hungry GPU like the RTX 5080, the Corsair RM850x has your back. I paired it with my RTX 5080 build and it runs buttery smooth—zero stability issues, zero noise drama. Pros: • Handles RTX 5080 Without Breaking a Sweat: Delivers clean, consistent power under load. • Fully Modular Design: Only use the cables you need—clean, simple, and airflow-friendly. • Whisper Quiet: The fan barely runs, and when it does, it’s silent. • 80+ Gold Certified: Efficient and cool, even during long gaming sessions. • Top-Notch Build Quality: Premium components and a 10-year warranty for peace of mind. Cons: • Cables Are a Bit Stiff: Cable management takes some effort, especially with the 24-pin. • Slightly Pricey: But you’re paying for reliability and long-term performance. In short, the RM850x is a future-proof beast. If you’re throwing in a next-gen GPU like the RTX 5080, this PSU is more than ready to carry the load.

## Frequently Bought Together

- CORSAIR RM850x 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 7800X3D 8-Core, 16-Thread Desktop Processor

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-04-24*