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.
Q: Is the power supply compatible with the ATX 3.1 power standard?
A: The RMx PSUs are compliant with the ATX 3.1 power standard from Intel.
Q: What is the warranty period for the power supply?
A: The RMx power supply comes with a ten-year warranty.
Q: How many PCIe connectors does the power supply have?
A: This power supply has three 8-pin PCIe connectors and one 12+4-pin PCIe connector.
Q: What type of cooling fan is used in the power supply?
A: The Corsair RM850x power supply uses a 140mm fluid dynamic bearing fan for cooling.
Q: Does the power supply come with a power cord?
A: This power supply includes a power cord.
Q: Will this power supply work with a RTX 5080? Are any additional cables needed?
A: Yes, it will, all cables attached
A: undefined

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.

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.

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.

CORSAIR CX-M Series Low-Noise Power Supplies offer 80 PLUS Bronze efficiency and semi-modular cabling for reliable, low-noise operation. With Dual EPS12V cables and two/four PCIe 8-pin power connectors, CX-M PSUs have all the connections needed to power today’s most demanding PC upgrades. Japanese 105°C-rated capacitors deliver superb electrical performance and reliability for your system, backed by a five-year warranty. Robust DC-DC conversion ensures clean, consistent power for all your components and peripherals. With a compact 140mm size allowing for great flexibility in build configurations, CX-M Series power supplies deliver reliable power for nearly any build.
| Pros for CORSAIR - RMx Series RM850x Cybenetics Gold Fully Modular ATX Power Supply - Black | |||
|---|---|---|---|
| There were no pros for this product— | Overall Performance, Power Capacity, Noise Level, Cable Management, Fan Control | Overall Performance, Noise Level, Cable Management, Power Capacity, Modularity | Overall Performance, Noise Level, Cable Management, Power Supply, Price |
| Cons for CORSAIR - RMx Series RM850x Cybenetics Gold Fully Modular ATX Power Supply - Black | |||
| There were no cons for this product— | Coil Whine | There were no cons for this product— | Coil Whine, Size |
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Picked this up for a new PC build and it's been running great. The installation was straightforward, and the fully modular cables definitely made things a lot cleaner inside the case. Everything powered on the first try, and it's been stable without any issue. Running a Core i7 & PNY 5060 without breaking a sweat. Also really quiet – honestly can’t hear it at all most of the time. It seems well-built and came nicely packaged too. No complaints so far. Hopefully it holds up long-term, but first impressions are all positive. Would buy again.
This review is from CORSAIR - RMx Series RM850x Cybenetics Gold Fully Modular ATX Power Supply - Black
Posted by Squall
I purchased a RTX 5070 Founders Edition GPU and wanted to upgrade my Corsair CX 650 M PSU as well. Moving up to the RMx Corsair series was the right move. It has better internal components, greater efficiency and a manual over-ride control for the fan. In addition, it comes with the latest power cable, perfect for my new GPU!
This review is from CORSAIR - RMx Series RM850x Cybenetics Gold Fully Modular ATX Power Supply - Black
Posted by LP1419IVSM
Had to buy a new PSU since I made a major upgrade on my GPU. I ended up buying this and it was definitely worth the money. Very easy to install and it came with every cable necessary, I didn't even have to buy any extra cables. Runs very quiet even with the newest AAA games which is great.
This review is from CORSAIR - RMx Series RM850x Cybenetics Gold Fully Modular ATX Power Supply - Black
Posted by AubrianaW