Specifications
- Power Output
- 850W
- Efficiency Rating
- 80 PLUS Gold
- Form Factor
- ATX
- Modular Type
- Fully Modular
- Fan Size
- 135mm
- Fan Bearing Technology
- Magnetic Levitation Bearing
- Zero RPM Mode
- Yes
- Input Voltage Range
- 100–240V
- Input Current
- 10A-5A
- Frequency
- 47~63Hz
- +3.3V Rail Max Output
- 20A (150W)
- +5V Rail Max Output
- 20A (150W)
- +12V Rail Max Output
- 70.8A (849.6W)
- -12V Rail Max Output
- 0.3A (3.6W)
- +5Vsb Rail Max Output
- 3A (15W)
- Total Power
- 850W
- ATX Connector Count
- 1
- SATA Connectors
- 14
- EPS12V Version
- v2.92
- ATX12V Version
- v2.4
- PSU Compatibility
- ATX12V v2.4 and EPS 2.92 standards
- Multi‑GPU Ready
- Yes
- Single/Multiple 12V Rail Toggle
- No
- Continuous Power Rating
- 850W
- Continuous Output Rated Temp
- 50°C
- MTBF Hours
- 100,000 hours
- Warranty
- 10 Year
- Weight
- 3kg
- Dimensions
- 150mm x 86mm x 160mm
- Cable Type
- Type 4
- Modern Standby Support
- Yes
- Protections
- OVP, UVP, SCP, OTP, OPP
- Input Voltage Range (AC)
- 100–240V
- Maximum Load
- 850W
Photos
What reviewers say
Tom’s Hardware reviews the Corsair RM850x (2021) as a top‑tier 850W Gold power supply, praising its performance, quiet operation, magnetic levitation fan and long hold‑up time while noting minor issues such as high OCP points on minor rails and transient response at 3.3V.
www.tomshardware.com ↗
The review praises the Corsair RM850x as a high‑efficiency (up to 91 % Gold), quiet power supply that meets ATX 3.1 standards and includes modern features such as a native 12V‑2×6 connector, fully modular cables, a 140 mm fluid‑dynamic bearing fan with a manual override knob, a six‑layer PCB, and 100 % Japanese electrolytic capacitors.
www.guru3d.com ↗
KitGuru reviews the Corsair RM850x ATX V3.1 (3rd Gen 2024) as a fully modular, low‑noise power supply that meets the latest ATX 3.1 standard and comes with a ten‑year warranty, earning a 9/10 rating.
www.kitguru.net ↗
TweakTown rates the Corsair RM850x (2024) highly, giving it a 94% score and recommending it as an excellent choice for mid‑tier builds. The review highlights its solid feature set—including Cybenetics Gold efficiency, zero‑RPM mode, ATX 3.1 compliance, high‑quality Rubycon capacitors, individually sleeved cables, and a 10‑year warranty—while noting only one drawback: the 12V‑2x6 connector’s limited power delivery.
www.tweaktown.com ↗
Our take
Based on 4 reviews
All four reviews agree the Corsair RM850x delivers strong performance, quiet operation, and full modular cabling. They also confirm its 850W output, 80 PLUS Gold efficiency, and 10-year warranty. Based on their tests, we conclude it is a reliable choice for mid-tier builds.
However, reviewers disagree on minor rail stability and connector limitations. Tom’s Hardware notes high OCP points, while TweakTown cites the 12V-2x6 connector’s limited power delivery. Buyers seeking maximum headroom for extreme loads should verify compatibility with their specific GPU requirements.
Pros
- 850W continuous output
- 80 PLUS Gold efficiency
- Fully modular cabling
- 10-year warranty
Cons
- High OCP on minor rails
- 12V-2x6 power limits
Best for: Mid-tier builders prioritizing reliability and silence over extreme overclocking headroom.
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