CORSAIR RM850e (2025) ATX 3.1 PCIe 5.1 Ready 850W Power Supply – Black
Bottom line: The CORSAIR RM850e ATX 3.1 PCIe 5.1 Ready 850W Power Supply ($115.99 on Amazon as of 2026-10-21 04:20 UTC): Native 12V-2x6 connector and cable for current GPUs, no adapter needed; main trade-off: cybenetics Gold efficiency, a step below Platinum-rated units.
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*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Native 12V-2x6 connector and cable for current GPUs, no adapter needed
- ✓ ATX 3.1 certified to ride out 2x GPU transient power spikes
- ✓ Fully modular cabling: connect only what your build uses
- ✓ Compact 140mm casing length fits tighter ATX cases
- ✓ Seven-year warranty and 105°C-rated capacitors
Cons
- ✗ Cybenetics Gold efficiency, a step below Platinum-rated units
- ✗ Rifle-bearing fan rather than a fluid-dynamic-bearing design
- ✗ 850W leaves limited headroom for flagship GPU plus high-end CPU
- ✗ Exact PCIe 8-pin connector count not stated; verify for your GPU
Manufacturer description
The CORSAIR RM850e (2025) is an 850W power supply for current PC builds. It is Intel ATX 3.1 certified and PCIe 5.1 ready, and it ships with a native 12V-2x6 connector and cable. That means a current-generation graphics card plugs straight in, with no adapter dongle crowding your case. An array of PCIe 8-pin connectors covers cards that still use the older standard. The ATX 3.1 standard means the PSU is built to handle GPU power spikes of up to 2x rated load. Those spikes are what trip weaker units during gaming. The cabling is fully modular, so you connect only the cables your build needs…
SpecPicks Verdict
SpecPicks scored CORSAIR RM850e ATX 3.1 PCIe 5.1 Ready 850W Power Supply using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies & cables category. Compare with similarly-priced alternatives in the power supplies & cables category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for power supplies & cables of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Does the Corsair RM850e work with graphics cards that use the 12V-2x6 or 12VHPWR connector?
Yes. The RM850e (2025) includes a native 12V-2x6 connector and cable, and it is ATX 3.1 and PCIe 5.1 compliant. You can power current-generation cards directly without an adapter.
Will the RM850e fit in my case?
The casing is 140mm long, which fits nearly all standard ATX cases. Check your case's PSU clearance, and leave extra room for cable routing behind the unit.
How loud is the Corsair RM850e under load?
It uses a 120mm rifle-bearing fan with a specially calculated fan curve to keep noise down, even when running at full load.
What warranty comes with the RM850e?
Corsair backs the RMe series with a seven-year warranty. Check the product listing or Corsair's site for current warranty terms and registration details.
Is the RM850e fully modular, and does it support Modern Standby?
Yes to both. Every cable is modular, so you install only the ones your build needs. Modern Standby compatibility gives fast wake-from-sleep and better efficiency at low loads.
Key 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.
- 105°C-Rated Capacitors: Delivers steady, reliable power and dependable electrical performance.
- Modern Standby Compatible: Extremely fast wake-from-sleep times and better low-load efficiency.
Full Specifications
| Brand | Corsair |
|---|---|
| Color | Black |
| Wattage | 850 watts |
| Model Name | CORSAIR RM850e |
| Form Factor | ATX |
| Keeps Quiet | A 120mm rifle bearing fan with a specially calculated fan curve keeps fan noise down, even when operating at full load. |
| Model Number | CP-9020296-NA |
| Connector Type | ATX |
| Cooling Method | Air |
| Number of Fans | 1 |
| Output Wattage | 850 watts |
| Item Dimensions | 5.91 x 5.51 x 3.35 inches |
| Mfr Part Number | CP-9020296-NA |
| Number of Items | 1 |
| 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. |
| Compatible Devices | Monitor |
| Power Supply Design | Full Modular |
| Warranty Description | 7 Years Manufacturer |
| Maximum Input Voltage | 240 volts_of_alternating_current |
| Minimum Input Voltage | 100 volts_of_alternating_current |
Ready to buy?
CORSAIR RM850e (2025) ATX 3.1 PCIe 5.1 Ready 850W Power Supply – Black is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
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