Description
The CORSAIR SF850 stands as a pinnacle of small form factor engineering, delivering 850 watts of 80 PLUS Platinum certified power. Designed for the most demanding Mini-ITX builds, this unit integrates ATX 3.1 compliance and native PCIe 5.1 support, ensuring compatibility with next-generation hardware like the NVIDIA GeForce RTX 40-series. Its fully modular Type-5 micro-connectors reduce cable clutter, while the 92mm PWM fan operates silently under low loads thanks to Zero RPM technology.
This product is for:
- SFF Enthusiasts: Builders creating high-end Mini-ITX systems who require maximum power density in a restricted space.
- Next-Gen Gamers: Users upgrading to RTX 40-series or 50-series GPUs that utilize the 12V-2x6 power connector.
- Silent PC Builders: Individuals prioritizing low noise levels, benefiting from the Zero RPM fan mode during productivity tasks.
- Professional Workstation Users: Creators using compact workstations that demand stable, Platinum-rated efficiency for long rendering sessions.
- Cable Management Perfectionists: Builders who appreciate the flexible, space-saving Type-5 micro-fit connectors for cleaner internal airflow.
Detailed specifications:
- Form Factor: SFX (ATX 3.1 Compliant)
- Total Wattage: 850W
- Efficiency Rating: 80 PLUS Platinum
- Cooling: 92mm PWM Fan with Zero RPM Mode
- Connectors: 1x 24-pin ATX, 2x EPS12V (4+4), 1x 12V-2x6 (12+4-pin), 3x PCIe (6+2), 8x SATA, 3x PATA
- MTBF: 100,000 Hours
- Warranty: 5-Year Limited Warranty
Installing the SF850 is a streamlined experience due to the inclusion of CORSAIR’s Type-5 micro-fit connectors. These cables are significantly smaller at the PSU end, allowing for more room to maneuver in tight chassis like the FormD T1 or Fractal Terra. During high-load gaming, the 92mm fan maintains a steady thermal profile without the aggressive whine often associated with smaller units. The transition to ATX 3.1 means the unit is built to handle transient power spikes more effectively, providing peace of mind for users with high-TDP components.
Compared to the previous SF750, the SF850 offers a 100W increase in overhead and updated ATX 3.1 architecture, making it better suited for modern high-draw GPUs. While standard ATX power supplies offer similar wattage at lower prices, they physically cannot fit into the sub-15L cases where the SF850 excels. Against competitors in the SFX space, CORSAIR’s 80 PLUS Platinum efficiency and the reliability of the Type-5 cable ecosystem provide a more premium and future-proof building experience.
Q&A:
- Does the CORSAIR SF850 include a 12VHPWR cable? Yes, it features a native 12V-2x6 (PCIe 5.1) cable compatible with modern high-end graphics cards.
- Is this PSU compatible with standard ATX cases? While designed for SFX, it can fit ATX cases using an optional SFX-to-ATX adapter bracket (sold separately).
- What is the benefit of ATX 3.1 compliance? ATX 3.1 improves power delivery stability and provides better handling of peak power excursions from modern GPUs.
- How does the Zero RPM mode work? The 92mm fan remains stationary at low to medium loads, ensuring completely silent operation until a specific temperature or power threshold is met.
- Are the cables compatible with older CORSAIR PSUs? No, the SF850 uses Type-5 micro-connectors, which are physically different from the Type-4 cables used in many previous CORSAIR models.
