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Rectangular black ATX power supply unit with modular cable sockets and a 140mm fan grille

Corsair

Corsair CP-9020073-NA HX850i 850W power supply

SKU CH-5AEA-CTX0T MPN CP-9020073-NA

Fully modular 850 W ATX unit with 80 PLUS Platinum efficiency, C-Link monitoring, a 140 mm fluid-dynamic fan and twelve SATA connectors

  • TypeATX12V / EPS12V
  • Maximum Power850 W
  • Fans1 x 140mm Thermally Controlled Fluid Dynamic Bearing Fan
  • PFCActive
  • Main Connector20+4Pin
  • +12V RailsSingle or 7

Options ATX 80+ Platinum (850W) HXi Series

  • 850 W output powers demanding builds
  • 92 % efficiency at 80 PLUS PLATINUM saves energy
  • Full modular cables reduce clutter
  • 140 mm fluid dynamic bearing fan runs quietly
  • C-Link monitoring enables software control

HX850i 850W Platinum ATX Supply

The Corsair HX850i is a fully modular ATX12V and EPS12V power supply rated at 850 W. It carries 80 PLUS Platinum certification and delivers 92% typical efficiency across a 100 to 240 V input range. The unit suits high-end desktop builds that need reliable, efficient power delivery.

Installation and common issues

Full modular cabling lets you connect only the 20+4 pin main, six 6+2 pin PCIe and twelve SATA leads required by the build. A 140 mm thermally controlled fluid dynamic bearing fan keeps noise low at typical loads. The 180 mm depth fits most standard ATX cases, though very compact chassis should be measured first. C-Link monitoring requires a free USB header and the Corsair Link software for voltage and fan control.

Ideal users and alternatives

Enthusiasts running multi-GPU SLI or CrossFire configurations benefit from the single or seven +12 V rail modes and the 40 A per rail capability. Builders who prefer a semi-modular or lower-wattage design for smaller systems may find simpler units more appropriate. The Platinum rating and digital monitoring suit users who value efficiency data and software control.

Points forts

  • 850 W output powers demanding builds
  • 92 % efficiency at 80 PLUS PLATINUM saves energy
  • Full modular cables reduce clutter
  • 140 mm fluid dynamic bearing fan runs quietly
  • C-Link monitoring enables software control

Caractéristiques

BrandCORSAIR
SeriesHXi Series
ModelCP-9020073-NA
TypeATX12V / EPS12V
Maximum Power850 W
Fans1 x 140mm Thermally Controlled Fluid Dynamic Bearing Fan
PFCActive
Main Connector20+4Pin
+12V RailsSingle or 7
PCI-Express Connector6 x 6+2-Pin
SATA Power Connector12
SLISLI Ready
Haswell SupportYes
CrossFireCrossFire Ready
Max PSU Length180 mm
ModularFull Modular
Efficiency92%
Energy-Efficient80 PLUS PLATINUM Certified
Over Voltage ProtectionYes
Input Voltage100 - 240 V
Input Frequency Range47 - 63 Hz
Input Current12 - 6 A
OutputSingle +12V Rail Mode: +3.3V@25A, +5V@25A, [email protected] , [email protected] , +5VSB@3A
Multiple +12V Rail Mode: +3.3V@25A, +5V@25A, +12V1@40A, +12V2@40A, -12V3@40A, +12V4@40A, +12V5@40A, +12V6@40A, +12V7@40A, [email protected] , +5VSB@3A
ApprovalsFCC, ICES, CE, UL / CUL, CSA, C-Tick / RCM, TUV, CB, CU, KC Mark, RoHS, WEEE, RoHS (China), REACH.
Connectors1 x ATX Connector
2 x EPS Connector
2 x Floppy Connector
12 x 4-Pin Peripheral Connector
6 x PCI-E Connector
12 x SATA Connector
FeaturesCorsair Link Integration for monitoring performance and adjustment of fan speed and multi-rail/single rail mode.
80 PLUS Platinum efficiency, delivering 92% energy efficiency at real world load conditions.
ZeroRPM mode for fanless operation at low loads and outstanding noise reduction.
140mm thermally controlled fluid dynamic bearing fan spins up as needed.
Fully Modular low profile cables for easy installation, less clutter, and helps maximize airflow through your computer's chassis.
Engineered to meet maximum power output at a server-grade 50 degree C temperature rating.
Fan self-t
Dimensions3.39" x 5.91" x 7.09"
Weight7.44 lbs.
Poids d’expédition3.83 kg
Dimensions du colis394 × 224 × 152 mm

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Questions sur cet article

How do I confirm the HX850i is delivering stable power after installation?

Connect the unit to the Corsair Link software via the C-Link port and monitor the real-time +12V rail voltage and fan speed; both should remain steady under load.

Which cables and accessories ship with the HX850i and what must I source separately?

The box includes the fully modular PSU, all black-sleeved cables for the 20+4-pin motherboard, 6+2-pin PCIe, SATA and peripheral connectors, plus mounting screws and a power cord; no extra cables are required for a standard build.

The specs list both single-rail and seven-rail modes — which should I select for my system?

Use the default single +12V rail mode for most modern builds; switch to the seven-rail configuration only if you need per-rail over-current limits for specific multi-GPU or workstation setups.

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