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Corsair HX850i High-Performance ATX 850W 80 PLUS Platinum PSU
Corsair

Corsair HX850i

Power SuppliesView on corsair.com
Wattage:
850 W
80 PLUS Rating:
Platinum
Modularity:
Fully Modular
ATX Standard:
ATX 2.x

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Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.

Manufacturer: Corsair Last updated: 2026-09-15

Where to buy

Corsair HX850i (850W/80+ Platinum/Fully Modular/Digital/Multi-GPU Legacy Flagship) Review

If you're looking at the Corsair HX850i for an 850W 80 PLUS Platinum digital PSU with iCUE monitoring, it's the older HXi-generation unit that predates Corsair's ATX 3.0 refresh.

We'd still consider it for a multi-GPU or heavily overclocked build wanting Platinum efficiency and a 10-year warranty, but if you need native 12V-2x6 for a current RTX 40/50-series card, the newer HX1000i or HX1200i are the better ATX 3.0 picks.

Legacy Digital Feature Set

The HX850i predates native 12V-2x6 support, so RTX 40/50-series GPUs need an adapter cable. Where it still earns its keep is iCUE-based digital monitoring and a selectable single/multi-rail 12V configuration, both features some newer budget units drop.

Specifications

Identity

BrandCorsair
Model NumberHX850i

Connector inventory

SATA Connectors12

Form factor and fit

Length180 mm
ColourBlack

Cooling

Fan BearingFluid Dynamic

Build quality

MTBF100000 hours

Cables

ModularityFully Modular

Monitoring, protection and price

Digital MonitoringYes
Price224.99 USD
Warranty10 years
Wattage850 W
80 PLUS RatingPlatinum
ATX StandardATX 2.x
Form FactorATX
Zero-RPM ModeYes
PCIe 8-pin Connectors6
Connector Count1x 24-pin ATX, 2x EPS 8-pin, 6x PCIe 6+2-pin, 12x SATA, 2x Molex, 2x FDD
Fan Size140 mm
Fan Model / Bearing140mm fluid dynamic bearing
Japanese CapacitorsYes
Source URLhttps://www.corsair.com/us/en/p/psu/cp-9020073-na/hxi-series-hx850i-high-performance-atx-power-supply-850-watt-80-plus-platinum-certified-psu-cp-9020073-na

Expert Review

Reviewed by Burooj Alam. Rated by us, not by users.

Best for

  • Multi-GPU or heavy overclocking builds wanting Platinum efficiency
  • Buyers who want iCUE digital PSU monitoring
  • Long-term builds valuing the 10-year warranty

Not for

  • Builders wanting native ATX 3.0/12V-2x6 support
  • Compact cases (180mm length)
  • Anyone prioritizing the newest efficiency certifications

FAQs

What are the key specifications of the Corsair HX850i (850W/80+ Platinum/Fully Modular/Digital/Multi-GPU Legacy Flagship)?

The Corsair HX850i (850W/80+ Platinum/Fully Modular/Digital/Multi-GPU Legacy Flagship) is a power supply from Corsair. Key specs: Wattage 850, 80 PLUS Rating Platinum, Modularity Fully Modular, ATX Standard ATX 2.x, PCIe 8-pin Connectors 6.

Will the Corsair HX850i (850W/80+ Platinum/Fully Modular/Digital/Multi-GPU Legacy Flagship) work with my current setup?

The Corsair HX850i (850W/80+ Platinum/Fully Modular/Digital/Multi-GPU Legacy Flagship) lists Wattage is 850. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.

Who is the Corsair HX850i (850W/80+ Platinum/Fully Modular/Digital/Multi-GPU Legacy Flagship) best suited to?

It suits multi-gpu or heavy overclocking builds wanting platinum efficiency, buyers who want icue digital psu monitoring, long-term builds valuing the 10-year warranty.

What are the drawbacks of the Corsair HX850i (850W/80+ Platinum/Fully Modular/Digital/Multi-GPU Legacy Flagship)?

It is a poor fit for builders wanting native atx 3.0/12v-2x6 support, compact cases (180mm length), anyone prioritizing the newest efficiency certifications.

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