Powerful, compact power is essential for a smooth-running small-form-factor PC, yet many SFF builds struggle with overheating or insufficient wattage. The Corsair SF850, 850 W, 100 - 240 V, 47 - 63 Hz, 5 - 10 A, Power Supply delivers reliable, Platinum-rated efficiency in an SFX case, keeping your components cool and your system stable.
Corsair Power Supply
A reliable power source prevents crashes, protects expensive hardware and ensures your build can handle demanding workloads. Without enough clean power, you risk instability, data loss and shortened component life. This unit solves those issues with full modular cabling, top-mounted fan and comprehensive protection, giving you confidence that every component receives the right voltage at all times.
Usages of a 850 W Power Supply
Ideal for high-performance SFF gaming rigs, workstation PCs and compact servers, this 850 W supply powers multiple GPUs, fast CPUs and numerous drives while fitting into tight cases that require an SFX form factor.
Benefits of Corsair Power Supply
You enjoy industry-leading 80 PLUS Platinum efficiency, which lowers electricity costs and reduces heat output. The silent top-mounted fan and optional silent mode keep noise to a minimum, perfect for work or entertainment environments. Full modular cables simplify cable management, improving airflow and aesthetics. Robust protection features guard against over-current, over-voltage and short circuits, extending the lifespan of your build.
Key Features of a 850 W Power Supply
- Power protection features: Over current, Over power, Over voltage, Overheating, Short circuit. Keeps your system safe from electrical faults.
- Max output current (+12V): 70.8 A. Provides ample power for high-end graphics cards and CPUs.
- Combined power (+12V): 850 W. Delivers the full wattage rating for demanding builds.
- Fully-Modular cabling: Yes. Allows you to use only the cables you need, reducing clutter.
- PCI Express power connectors (6+2 pin): 3. Supports multiple GPUs or other high-draw devices.
- PCI Express cable length: 75 cm. Gives flexibility to reach components in compact cases.
- Fan diameter: 9.2 cm. Small fan fits tight spaces while delivering effective cooling.
- Silent mode: Yes. Enables quieter operation when full cooling isn’t required.
- MTBF: 100 000 h. Indicates long-term reliability for continuous use.
- Dimensions (HxDxW): 63.5 mm × 100 mm × 125 mm. Fits easily into SFX chassis without sacrificing performance.
Specifications
| Power |
| Power protection features |
Over current, Over power, Over voltage, Overheating, Short circuit |
| Max output current (+5Vsb) |
3 A |
| Max output current (+5V) |
20 A |
| Max output current (+12V) |
70.8 A |
| Max output current (+3.3V) |
20 A |
| Combined power (+5Vsb) |
15 W |
| Combined power (+5V) |
130 W |
| Combined power (+12V) |
850 W |
| Combined power (+3.3V) |
130 W |
| Input current |
5 - 10 A |
| AC input frequency |
47 - 63 Hz |
| AC input voltage |
100 - 240 V |
| Total power |
850 W |
| Ports & interfaces |
| Cabling type |
Fully-Modular |
| ATX power connector (12+4 pin) |
Yes |
| PCI Express power cable length |
75 cm |
| PCI Express power connectors (6+2 pin) |
3 |
| EPS power connector (4+4 pin) |
Yes |
| SATA power cable length |
455 mm |
| Number of PATA power connectors |
1 |
| Number of SATA power connectors |
3 |
| Motherboard power cable length |
30 cm |
| Motherboard power connector |
24-pin ATX |
| Performance |
| Mean time between failures (MTBF) |
100000 h |
| Bearing technology |
FDB |
| Silent mode |
Yes |
| ATX version |
3.1 |
| 80 PLUS certification |
80 PLUS Platinum |
| Power supply unit (PSU) form factor |
ATX |
| Purpose |
PC |
| Design |
| On/off switch |
Yes |
| Fan location |
Top |
| Number of fans |
1 fan(s) |
| Fan diameter |
9.2 cm |
| Cooling type |
Active |
| Product colour |
Black |
| Packaging content |
| Cables included |
AC |
| Weight & dimensions |
| Weight |
2.3 kg |
| Height |
63.5 mm |
| Depth |
100 mm |
| Width |
125 mm |
| Packaging data |
| Package type |
Box |
