CORSAIR RM850e (2025) Fully Modular Low-Noise ATX Power Supply with 12V-2x6 Cable – ATX 3.1 & PCIe 5.1 Compliant, Cybenetics Gold Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black
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Availability:
In Stock.
Arrives
Nov 24 – Nov 26
Style: RMe (2025) ATX 3.1, PCIe 5.1
Size: 850 Watts
Color: Black
Features
- Fully Modular PSU: Reliable and efficient, low-noise power supply with fully modular cabling, so you only have to connect the cables your system build needs.
- Intel ATX 3.1 Certified: Compliant with the ATX 3.1 power standard, supporting PCIe 5.1 platform withstands 2x transient power excursions from the GPU.
- Keeps Quiet: A 120mm rifle bearing fan with a specially calculated fan curve keeps fan noise down, even when operating at full load.
- 105C-Rated Capacitors: Delivers steady, reliable power and dependable electrical performance.
- Modern Standby Compatible: Extremely fast wake-from-sleep times and better low-load efficiency.
Description
CORSAIR RMe Series Fully Modular Low-Noise Power Supplies provide quiet, reliable power with Cybenetics Gold efficiency to your PC. The modular cables make PC builds easy, as you connect only the cables your system requires. With ATX 3.1 and PCIe 5.1 compliance with inclusion of native 12V-2x6 connnector and cable, and an array of PCIe 8-pin power connectors, RMe PSUs have the connections needed to power today’s demanding PC hardware. Industrial-grade, 105°C-rated capacitors deliver superb electrical performance, backed by a seven-year warranty. With a 140mm-long casing that works with nearly any modern case, the CORSAIR RMe Series is steady power for your system. Box Contents 1x 24-pin ATX (24-pin) Connector Cable 2x 8-pin ATX 12V/EPS12V (4+4-pin) Connector Cables 1x 8-pin PCIe (6+2-pin) Connector Cable 1x 600W 12V-2x6 (12+4-pin) Connector Cable 1x 12V-2x6 (12+4-pin) to dual 8-pin PCIe (6+2-pin) Cable 6x SATA Connectors 2x PATA Connectors
Model Name: CORSAIR RM850e
Brand: Corsair
Compatible Devices: Monitor
Connector Type: ATX
Output Wattage: 850 Watts
Form Factor: ATX
Wattage: 850 watts
Cooling Method: Air
Item dimensions L x W x H: 5.91 x 5.51 x 3.35 inches
Item Weight: 3.4 Pounds
Brand: Corsair
Series: CORSAIR RM850e
Item model number: CP-9020296-NA
Item Weight: 3.37 pounds
Product Dimensions: 5.91 x 5.51 x 3.35 inches
Item Dimensions LxWxH: 5.91 x 5.51 x 3.35 inches
Color: Black
Manufacturer: Corsair
Date First Available: January 7, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Nov 24 – Nov 26
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: RMe (2025) ATX 3.1, PCIe 5.1
Size: 1000 Watts
Color: Black
I've used Corsair power supplies for years. Well recently I updated my PC and needed a bigger Power supply. So I bought one that WASN"T corsair because I thought that "Its just a Power Supply I'll be fine and cheap out on it" Turns out the one I bought, the PCIE cable was super weird and had way too many extra cables. The CPU cord just was not long enough, so I was not able to have nice looking cable management. And to top it all off my PC would boot up but instantly shut down. So instead of messing with it, I just bought this Power Supply. And it has all the correct cables you need, all the appropriate lengths. And I love that you can choose which cables you need and which ones you do not. It makes for a nice clean look for your PC. I hooked up all the appropriate cables, and it powered up and worked first try. So all in all lesson learned, I will be sticking for CORSAIR power supplies for the rest of my life!
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Reviewed in the United States on November 2, 2025 by Colton Zieber
Style: RMe (2025) ATX 3.1, PCIe 5.1
Size: 850 Watts
Color: Black
I recently built a new computer and decided that my old Corsair RM850X needed to be retired. I chose the PSU because, for me, Corsair has always been a rock solid choice. They are priced competitively and I have never had an issue with power rails or delivery. I used custom cables so the color of the PSU itself wasn't really an issue. The cable length would have been long enough had I used them and they seemed to be high quality material. It's currently powering an AMD ryzen 9 9900x and a 7900xtx with no issues. I have 7 140mm fans, a 420mm aio and lots of RGB and it doesn't skip a beat. It may make me a Corsair fanboy but I will continue using their products until they give me a reason not to.
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Reviewed in the United States on November 3, 2025 by Larry Rodriguez
Style: RMe (2025) ATX 3.1, PCIe 5.1
Size: 850 Watts
Color: Black
I’ve been building PCs for over a decade, and this is easily one of the most impressive power supplies I’ve used to date. I picked up the CORSAIR RM850e (2025 revision) as part of a rebuild centered around an Intel i9-12900KS and RTX 3090, and I’ve been nothing but impressed so far. Build Quality & Design: The unit itself is solid — heavy in a reassuring way, with a clean black finish and no unnecessary branding or flashy extras. The fully modular design is a huge plus, especially for managing cables in a tight mid-tower. I appreciated that the included cables were all black and flat — easy to route behind the motherboard tray, and they look clean without custom sleeving. Installation & Cabling: Installation was simple, and everything fit snugly. I’m using the standard 3x 8-pin for the 3090, but it’s nice knowing the 12V-2x6 cable is included in case I upgrade to a future PCIe 5.1 card later on. No loose connectors, no weird bends required — and unlike some modular PSUs I’ve dealt with, the ports on the unit are clearly labeled and firmly seated. Performance & Stability: Despite powering a very power-hungry setup, this PSU hasn’t flinched once. The 12900KS, even under boost/load, can be a voltage-hungry CPU, especially paired with the 3090 — but even during max load stress testing (Cinebench + Heaven benchmark running together), rails stayed completely stable, no crashes or brownouts, and no sign of power-related instability. Noise & Efficiency: Corsair nailed the noise levels. During idle and light gaming, the fan doesn't even spin up. Even when it does under load, it’s so quiet it fades into the background of my other case fans. My case has good airflow, but the fan curve on this PSU is genuinely impressive. It’s also Cybenetics Gold rated, and the system draws power very efficiently — I've been monitoring wattage via a smart plug, and it lines up well with published benchmarks for power efficiency. Extras & Future-Proofing: ATX 3.1 & PCIe 5.1 ready 105°C-rated Japanese capacitors (a must for long-term reliability) Modern Standby support works perfectly — fast wake times, zero sleep issues in Windows 11 Final Thoughts: For anyone running a high-end system like mine — especially with power-hungry components like the i9-12900KS and RTX 3090 — this PSU offers peace of mind. No coil whine, no overheating, no second-guessing whether it’s enough. It’s quiet, efficient, and built with headroom for future GPUs thanks to the included 12V-2x6 cable and compliance with the latest standards. Highly recommend if you’re building or upgrading a performance-focused rig and want something that’ll last.
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Reviewed in the United States on June 27, 2025 by S.b
Style: RMe (2025) ATX 3.1, PCIe 5.1
Size: 750 Watts
Color: Black
Compré la fuente Corsair RM750e (2025) para mi sistema basado en una placa B650 con un procesador Ryzen y la GPU ASUS TUF RTX 5070 Ti, y los resultados han sido excelentes. El consumo se mantiene estable incluso durante sesiones largas de impresión 3D, render y gaming. La certificación 80 PLUS Gold y la compatibilidad con ATX 3.1 me dan tranquilidad para futuras upgrades. La modularidad facilita el orden en el cableado —muy importante cuando también trabajo con impresoras 3D y necesito un espacio limpio y eficiente—. El modo de ventilador “Zero RPM” mantiene el sistema prácticamente silencioso cuando no está en carga pesada.
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Reviewed in the United States on October 28, 2025 by Jean Carlos Vitola Cabarcas Jean Carlos Vitola Cabarcas
Style: RMe (2025) ATX 3.1, PCIe 5.1
Size: 750 Watts
Color: Black
I have used corsair power supplies for the past 15 years and I have never had any bad experiences with them. Their customer support is great, the modular system makes for a much cleaner cable management and nicer looking pc, it never overheats, the cables are quite sturdy. Corsair just makes solid power supplies and this one is no exception.
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Reviewed in the United States on November 12, 2025 by Nicholas Miller
Style: RMe (2025) ATX 3.1, PCIe 5.1
Size: 750 Watts
Color: White
Works perfectly and comes with all cords needed to power on my pc. I do recommend looking at what cords your specific pc needs or else you might be short a few.
Reviewed in the United States on November 10, 2025 by Sherrell
Style: RMe (2025) ATX 3.1, PCIe 5.1
Size: 750 Watts
Color: White
Installation was quick and everything fit perfectly in my case. It’s stable, efficient, and powers my GPU and CPU without a hitch. The build quality is top-notch, and it runs whisper quiet even during heavy gaming. The labeling on the modular cables is bright and easy to read, which made installation in a dim case simple. Power delivery is fast and consistent, and the system starts up instantly every time. It’s fully compatible with modern GPUs and motherboards, no issues or adapter problems at all. For the price, it’s great value and works flawlessly with modern components. If you want reliable, quiet power and a clean, tidy build, this PSU delivers exactly that.
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Reviewed in the United States on October 16, 2025 by VecPrime
Style: RMe (2025) ATX 3.1, PCIe 5.1
Size: 850 Watts
Color: White
The wires are super clean and plenty of length. Its a very quiet PSU and I highly recommend. I've seen a few reviews of people saying there is not enough PCIE cable slots but that's not true. There are three slots labeled CPU/PCIE the 2 on the left are CPU and the slot below the 12V Adapter is the spot for the extra PCIE cable that is included for GPUs with 24 Pin Connectors like the 7900XTX.
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Reviewed in the United States on October 31, 2025 by Steven Steven