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Compact silver SFX power supply unit with modular cable connectors and cooling fan visible

Corsair

Corsair SF850 SFX power supply CP-9020256-NA

SKU CH-KFY0-1XNGH MPN CP-9020256-NA

An 850 W SFX power supply with 80 PLUS Platinum efficiency, fully modular cabling, a 92 mm PWM fan with Zero RPM mode, 105 °C Japanese capacitors, ATX 3.1 and PCIe 5.1 readiness.

  • TypeSFX
  • Maximum Power850 W
  • Fans92mm PWM cooling fan
  • Max PSU Length125 mm
  • ModularFull Modular
  • Energy-Efficient80 PLUS PLATINUM Certified

Options 850W

  • 80 PLUS Platinum efficiency reduces energy waste
  • 850 W output supports high-end components in small builds
  • Fully modular Type-5 cables keep the interior tidy
  • 92 mm PWM fan with Zero RPM mode stays silent at low load
  • 105 °C Japanese capacitors rated for 50 °C continuous operation

SF850 850 W SFX power supply

This Corsair SF Series unit delivers 850 W in the compact SFX form factor. It carries 80 PLUS Platinum certification and meets ATX 3.1 and PCIe 5.1 specifications. A 92 mm PWM fan provides cooling with a Zero RPM mode at low load. Japanese capacitors rated for 105 °C support continuous operation at 50 °C.

Ideal for high-performance small-form-factor builds

The fully modular design with Type-5 Micro-Fit connectors suits compact systems that need substantial headroom for modern GPUs and CPUs. Builds constrained to smaller SFX volumes or lower wattage requirements should consider other models in the range. The SFX-to-ATX bracket allows installation in standard ATX cases when needed.

Check case clearance and cable routing

Verify the chassis accepts a 125 mm deep SFX unit and plan routing for the 300 mm ATX 24-pin cable alongside 400 mm EPS and PCIe leads. Confirm the motherboard and graphics card use standard 24-pin, 8-pin EPS and 12+4-pin PCIe connectors. Ensure the 100-240 V input matches local mains supply.

Points forts

  • 80 PLUS Platinum efficiency reduces energy waste
  • 850 W output supports high-end components in small builds
  • Fully modular Type-5 cables keep the interior tidy
  • 92 mm PWM fan with Zero RPM mode stays silent at low load
  • 105 °C Japanese capacitors rated for 50 °C continuous operation

Caractéristiques

BrandCORSAIR
SeriesSF Series
ModelCP-9020256-NA
TypeSFX
Maximum Power850 W
Fans92mm PWM cooling fan
Max PSU Length125 mm
ModularFull Modular
Energy-Efficient80 PLUS PLATINUM Certified
Input Voltage100 - 240 V
Input Frequency Range47 - 63 Hz
Input Current10A-5A
Output+3.3V@20A, +5V@20A, [email protected] , +5VSB@3A
Connectors1 x ATX Cable (24-PIN) (24): 300mm
2 x EPS/ATX12V Cable (8-PIN) (4+4): 400mm
3 x PCI-E Cable (8-PIN) (6+2): 400mm
1 x PCI-E Cable (12+4)PIN: 400mm
1 x SATA CABLE (4 Straight: 100mm, 115mm, 115mm, 115mm
1 x SATA CABLE (4 Right SATA): 100mm, 115mm, 115mm, 115mm
1 x PATA-PATA-PATA: 100mm, 115mm, 115mm
Dimensions4.92*3.94*2.50 inch
Weight2.31 lbs
Package ContentSF850 Power Supply | DC Cable Kit | SFX-ATX Adapter Bracket | Power Cord | Mounting Screws | Cable Ties
Poids d’expédition2.18 kg
Dimensions du colis311 × 159 × 105 mm

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Questions sur cet article

Does the SF850 require an SFX-to-ATX bracket if my case only fits standard ATX power supplies?

Yes, an SFX-to-ATX adapter bracket is included in the package so the 125 mm SFX unit can mount in a regular ATX opening.

Will the 12+4 pin PCIe 5.1 connector work with my older graphics card that uses an 8-pin plug?

The supply also ships with three 6+2 pin PCIe cables, so you can power legacy cards without using the new 12+4 pin lead.

How can I confirm the fan’s Zero RPM mode is active after I build the system?

Under light loads the 92 mm PWM fan stops completely; you will hear no fan noise until the internal temperature rises above the Zero RPM threshold.

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