--- product_id: 302229463 title: "RM850x Fully Modular ATX Power Supply - 80 Plus Gold - Low-Noise Fan - Zero RPM - Black" brand: "corsair" price: "$499.62" currency: USD in_stock: true reviews_count: 10 url: https://www.desertcart.us/products/302229463-rm850x-fully-modular-atx-power-supply-80-plus-gold-low store_origin: US region: United States of America --- # 80 PLUS Gold Efficiency 850W Full Modular Power 10-Year Warranty Reliability RM850x Fully Modular ATX Power Supply - 80 Plus Gold - Low-Noise Fan - Zero RPM - Black **Brand:** corsair **Price:** $499.62 **Availability:** ✅ In Stock ## Summary > ⚡ Power your passion with silence and style! ## Quick Answers - **What is this?** RM850x Fully Modular ATX Power Supply - 80 Plus Gold - Low-Noise Fan - Zero RPM - Black by corsair - **How much does it cost?** $499.62 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/302229463-rm850x-fully-modular-atx-power-supply-80-plus-gold-low) ## 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 - • **Whisper-Quiet Cooling:** 135mm magnetic levitation fan with Zero RPM mode keeps noise near silent. - • **Next-Gen Compatibility:** EPS12V connectors ensure seamless support for modern GPUs and motherboards. - • **Energy-Smart Performance:** 80 PLUS Gold certification means cooler temps, lower bills, and eco-friendly operation. - • **Tailored Cable Management:** Connect only what you need for a sleek, clutter-free build. - • **Premium Japanese Capacitors:** 105°C rated for unmatched durability and stable power delivery. ## Overview The CORSAIR RM850x is a fully modular 850W ATX power supply featuring 80 PLUS Gold efficiency, a whisper-quiet 135mm magnetic levitation fan with Zero RPM mode, and premium 105°C Japanese capacitors. Designed for modern PC builds, it offers EPS12V connectors for broad compatibility and is backed by a 10-year warranty, delivering reliable, clean, and efficient power with exceptional cable management and ultra-low noise. ## Description CORSAIR RM850x 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. RM850x 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. Review: You won't waste your money. - First and foremost, this power supply delivers rock-solid and stable power to my system. With an 80 PLUS Gold certification, it's highly efficient and ensures that my components receive clean and consistent power. Whether I'm gaming, video editing, or running demanding applications, I've never experienced any issues with power delivery. One of the standout features of the RM850x is its low-noise fan. Even under heavy loads, the fan remains incredibly quiet, ensuring a peaceful computing experience. I no longer have to worry about my power supply adding to the noise levels in my workspace. It offers efficient power delivery, exceptional cable management options, and silent operation, thanks to the low-noise fan and zero RPM fan mode. Whether you're a gamer, content creator, or PC enthusiast, this power supply won't disappoint. It's become an integral part of my system, and I can wholeheartedly recommend it to anyone seeking a power supply that combines performance, silence, and quality in one package. Corsair has once again delivered a product that exceeds expectations. Review: Energy Efficiency and Noise Level - This is the first PSU I ever bought for a PC, and first time installing one in a new case to move my build over from an old. My old PSU was one that came with my pre-built PC which was 500w. It started making some grinding and humming noises for a while and I also upgraded my cooling method for my CPU. I originally had a Thermalake CPU Cooler which I hated because it always got so hot. But I had to upgrade my PSU because my old one was not giving enough power. My RGB Fans and my Liquid Cooler RGB Lights would either dim or turn completely off and sometimes the PSU would get even louder like it was working a lot harder to keep the power flowing which caused a lot of performance issues. I. Love. Everything about this PSU, it's so much quieter, my computer is performing like new again, and all of my lights are staying on with no issue. I took online advice and made sure not to go cheap with this kind of thing because one cheap psu, if it's bad, it can go from cheap to expensive if you know what I mean. Your entire PC can fry which would make every component unsalvagable which means replacing the entire thing! My old PSU has been making the noises at least for over a year, I didn't think anything of it. I kept up with cleaning and maintaining it every 3 to 6 months to make sure dust never accumulated enough to cause issues. I'm still fairly new to this PC building thing but as far as my experience with this PSU so far, it's great, it's quiet, and it made my pc performance so much better. Take the advice like I did, don't go cheap with something like this. You won't regret it. The heart of your pc deserves the best for its lifespan. ## 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 105°C 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08R5JPTMZ | | Best Sellers Rank | #4 in Computer Power Supplies | | Brand | Corsair | | Compatible Devices | Personal Computer | | Connector Type Used on Cable | ATX | | Cooling Method | Air | | Customer Reviews | 4.8 4.8 out of 5 stars (5,640) | | Fan Size | 135 Millimeters | | Form Factor | ATX | | Item Dimensions | 6.3 x 5.91 x 3.39 inches | | Item Weight | 1.7 Kilograms | | Manufacturer | Corsair | | Maximum Input Voltage | 240 Volts | | Mfr Part Number | CP-9020200-NA | | Minimum Input Voltage | 100 Volts | | Model Name | RM850X | | Model Number | CP-9020200-NA | | Number of Fans | 1 | | Output Wattage | 850 | | Power Supply Design | Full Modular | | System Bus Connector Type | EPS | | UPC | 840006604839 | | Unit Count | 1.0 Count | | Warranty Description | 10 year manufacturer | | Wattage | 850 watts | ## Product Details - **Brand:** Corsair - **Compatible Devices:** Personal Computer - **Connector Type:** ATX - **Cooling Method:** Air - **Form Factor:** ATX - **Item Weight:** 1.7 Kilograms - **Item dimensions L x W x H:** 6.3 x 5.91 x 3.39 inches - **Model Name:** RM850X - **Output Wattage:** 850 - **Wattage:** 850 watts ## Images ![RM850x Fully Modular ATX Power Supply - 80 Plus Gold - Low-Noise Fan - Zero RPM - Black - Image 1](https://m.media-amazon.com/images/I/81k55rfk1iL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: Does this come with cables, or not?** A: Yes, our PSUs always include cables. With the 2021 RM750x' cables, the following connections are provided: o x1 ATX Cable 24-pin o x2 EPS/ATX12V 8-pin (4+4) o x4 PCIe 8-pin (6+2) o x4 PATA 4-pin o x10 SATA If you have any more questions or concerns, please feel free to reach out via support on our website and we'll happily assist you. **Q: 1000watt. How loud is the fan? My current psu is insanely loud and don’t want another.** A: You can barely here the fan of this PSU, you are more likely to hear your case fans than this PSU, that include under heavy usage. The fan of this PSU has a unique design which I think contribute to it's quite operation. I highly recommend this! **Q: What do I need in order to connect it to EU sockets?** A: Just the Power cable, these work with 110-240v and are auto switching. You need a C13 to whatever wall plug type is in use in the UK. I'm sure you can find them in abundance here on Amazon **Q: Is this compatible with cable kits for previous RMx power supplies?** A: Yes, cable kits compatible with the 2019 RMx are also compatible with 2021 RMx. If you have any more questions or concerns, please feel free to reach out via support on our website and we'll happily assist you. ## Customer Reviews ### ⭐⭐⭐⭐⭐ You won't waste your money. *by F***A on September 22, 2023* First and foremost, this power supply delivers rock-solid and stable power to my system. With an 80 PLUS Gold certification, it's highly efficient and ensures that my components receive clean and consistent power. Whether I'm gaming, video editing, or running demanding applications, I've never experienced any issues with power delivery. One of the standout features of the RM850x is its low-noise fan. Even under heavy loads, the fan remains incredibly quiet, ensuring a peaceful computing experience. I no longer have to worry about my power supply adding to the noise levels in my workspace. It offers efficient power delivery, exceptional cable management options, and silent operation, thanks to the low-noise fan and zero RPM fan mode. Whether you're a gamer, content creator, or PC enthusiast, this power supply won't disappoint. It's become an integral part of my system, and I can wholeheartedly recommend it to anyone seeking a power supply that combines performance, silence, and quality in one package. Corsair has once again delivered a product that exceeds expectations. ### ⭐⭐⭐⭐⭐ Energy Efficiency and Noise Level *by K***R on August 15, 2022* This is the first PSU I ever bought for a PC, and first time installing one in a new case to move my build over from an old. My old PSU was one that came with my pre-built PC which was 500w. It started making some grinding and humming noises for a while and I also upgraded my cooling method for my CPU. I originally had a Thermalake CPU Cooler which I hated because it always got so hot. But I had to upgrade my PSU because my old one was not giving enough power. My RGB Fans and my Liquid Cooler RGB Lights would either dim or turn completely off and sometimes the PSU would get even louder like it was working a lot harder to keep the power flowing which caused a lot of performance issues. I. Love. Everything about this PSU, it's so much quieter, my computer is performing like new again, and all of my lights are staying on with no issue. I took online advice and made sure not to go cheap with this kind of thing because one cheap psu, if it's bad, it can go from cheap to expensive if you know what I mean. Your entire PC can fry which would make every component unsalvagable which means replacing the entire thing! My old PSU has been making the noises at least for over a year, I didn't think anything of it. I kept up with cleaning and maintaining it every 3 to 6 months to make sure dust never accumulated enough to cause issues. I'm still fairly new to this PC building thing but as far as my experience with this PSU so far, it's great, it's quiet, and it made my pc performance so much better. Take the advice like I did, don't go cheap with something like this. You won't regret it. The heart of your pc deserves the best for its lifespan. ### ⭐⭐⭐⭐⭐ It a top power supply *by J***N on March 30, 2026* Great for the price I give works like a champ ## Frequently Bought Together - CORSAIR RM850x Fully Modular ATX Power Supply - 80 PLUS Gold - Low-Noise Fan - Zero RPM - 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 - ARCTIC MX-4 (4 g) - Premium Performance Thermal Paste for All Processors (CPU, GPU - PC), Very high Thermal Conductivity, Long Durability, Safe Application, Non-Conductive --- ## 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.us/products/302229463-rm850x-fully-modular-atx-power-supply-80-plus-gold-low](https://www.desertcart.us/products/302229463-rm850x-fully-modular-atx-power-supply-80-plus-gold-low) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-04-22*