Corsair SF850 (2024)
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Corsair SF850 (2024)
The Corsair SF850 2024 power supply unit powers high-performance components in compact Small Form Factor (SFF) PC builds. With a power output of 850W and an SFX form factor, it delivers stable energy to even the most demanding processors and graphics cards. Its fully modular cabling and high efficiency, confirmed by its 80 PLUS Platinum certification, make it the cornerstone for building modern and energy-efficient SFF systems. The PSU combines high performance with a compact SFX size for installation in small cases.
850W
Power
SFX
Form factor
80 PLUS Platinum
Certification
Fully
Modularity
Key technologies of the Corsair SF850 power supply unit
- 850W output powers energy-intensive components
- SFX form factor for installation in compact PC builds
- 80 PLUS Platinum certification reduces energy consumption and heat generation
- ATX 3.1 standard handles high power spikes from modern graphics cards
- Fully modular cabling simplifies installation and improves airflow
- Zero RPM mode switches off the fan under low load for silent operation
Choosing a power supply
When choosing a suitable PC power supply, the key parameter, aside from the form factor, is its power output. This indicates the maximum number of Watts the PSU can continuously supply to the components in the computer. It is a good idea to use an online calculator to work out the optimal power output based on your chosen components.
850W performance in an SFX form factor
The total power output of 850W reliably covers the energy demands of powerful gaming and professional workstations. Thanks to its compact SFX form factor, the PSU fits into small computer cases, where it can power even the most demanding gaming builds without compromising on performance. This makes it ideal for builds where space is limited but performance requirements are high. Support for the ATX 3.1 and PCIe 5.1 standards prepares the build for future generations of hardware. The PSU handles the high instantaneous power draws typical of modern graphics cards. Official certification confirms that it meets the strict requirements of the ATX 3.1 standard and delivers stable power even during sudden load changes, thereby protecting the connected components.
Ready for modern graphics cards
Included in the package is a 16-pin 12VHPWR cable that powers NVIDIA GeForce RTX 40 series and newer graphics cards. This single cable can transfer up to 600W, which simplifies connection and internal cable management. The PSU therefore supplies power directly via a single 12VHPWR cable, without the need for adapters.
Power supply unit efficiency
The 80 PLUS Platinum certification confirms the high efficiency of electrical energy conversion. This means the PSU produces less waste heat and reduces overall electricity consumption. Lower heat losses contribute to quieter operation and a longer lifespan for your components. The 80 PLUS Platinum certification itself confirms high efficiency at various load levels.
Quiet and efficient cooling
Cooling is handled by a 92mm fan with fluid dynamic bearings. The Zero RPM technology keeps the fan inactive under low to medium loads, resulting in completely silent operation. As the temperature and power draw increase, the fan speed smoothly ramps up. The smart speed regulation means the fan only activates under higher loads. The internal construction uses Japanese capacitors rated for an operating temperature of up to 105°C. These components form the basis for long-term stability and reliability. The PSU delivers its full performance at an ambient temperature of up to 50°C, which is crucial in SFF builds with limited airflow.
Fully modular cabling
The fully modular cabling system lets you connect only the cables your specific build requires. Using modern Type-5 Micro-Fit connectors reduces their physical size and makes them easier to handle. This approach simplifies cable management in small cases and improves airflow, where every centimetre of space is critical for effective cooling.
Connectors
- 1× ATX 24-pin
- 2× CPU 8-pin (4+4)
- 3× Molex 4-pin
- 2× PCI-E 8-pin (6+2)
- 8× SATA 15-pin
- 1× 12VHPWR 16-pin
Package contents
- Power supply unit
- 1× Power cable
- 1× ATX 24-pin
- 2× EPS / ATX 12V 8-pin (4+4)
- 3× PCIe 8-pin (6+2)
- 1× 12VHPWR 16-pin (12+4)
- 1× SATA (4 straight SATA)
- 1× SATA (4 right SATA)
- 1× PATA
80 Plus certification on the European market
The 80 Plus certification was created to objectively evaluate the efficiency of computer power supplies. This gives users a simple and clear way to compare different models. On the European market (where 230V is used), there are six levels of 80 Plus certification, each with specific requirements for power supplies. Higher energy efficiency primarily means lower energy consumption.
| PC PSU load | Efficiency at 20% load | Efficiency at 50% load | Efficiency at 100% load |
|---|---|---|---|
| 80 PLUS | 82% | 85% | 82% |
| 80 PLUS Bronze | 85% | 88% | 85% |
| 80 PLUS Silver | 87% | 90% | 87% |
| 80 PLUS Gold | 90% | 92% | 89% |
| 80 PLUS Platinum | 92% | 94% | 90% |
| 80 PLUS Titanium | 94% | 96% | 94% |
Specifications
Performance and format
Equipment
Efficiency
Connectors
Cooling system
Dimensions
| Code: | UY006sf52 |
| Warranty: | 84 months |
| Links: | Producer's Website: |