About Corsair SF850 80 Plus Platinum PSU
| Category | Specification |
|---|---|
| Power & Output | Total Power: 850 W +3.3 V: 20 A, +5 V: 20 A (combined up to 130 W) +12 V: 70.8 A (single rail, 850 W total) +5 VSB: 3 A / 15 W |
| Input | AC Input: 100–240 V, Input Current: 10–5 A, Frequency: 47–63 Hz |
| Form Factor & Compliance | SFX form factor Compliant with ATX 3.1 standard, PCIe 5.1 ready |
| Cooling & Fan | 1 × 92 mm fluid-dynamic bearing fan, with Zero RPM mode for silent operation under light to moderate load |
| Capacitors / Components | 100% Japanese electrolytic capacitors rated for 105 °C, for stability and longevity |
| Connectors (fully modular cables) | 1 × 24-pin ATX motherboard 2 × 4+4-pin EPS/ATX12V (CPU) 3 × PCIe 6+2-pin 1 × 12+4-pin (12VHPWR) for modern GPUs 8 × SATA power connectors 3 × Molex / PATA legacy connectors |
| Dimensions & Weight | 125 mm × 100 mm × 63.5 mm Weight: ~2.30 kg (including modular cables) |
| Reliability & Warranty | MTBF: 100,000 hours Warranty: 7 years |
| Operating Conditions | Rated for continuous output up to 50 °C ambient temperature |
| Certification & Safety | 80 PLUS Platinum certified; complies with ATX 3.1; includes standard PSU protections (OVP/UVP/OPP/OTP/SCP) per manufacturer specs |
One of its standout strengths is the 80 PLUS Platinum efficiency certification.
This means the SF850 operates with high energy efficiency — converting a larger portion of AC input into usable DC output, thereby reducing wasted energy as heat.
Such efficiency not only contributes to lower electricity bills but also reduces thermal stress within compact cases, which can help prolong component lifespan and maintain stable performance under load.
The fully modular design is another major benefit, especially for compact builds.
Modular cables let you connect only the cables you need — eliminating excess clutter, improving airflow, and making cable management simpler.
This is especially helpful in mini-ITX or micro-ATX builds where space is at a premium.
Cooling and acoustics are well addressed: the SF850 uses a 92 mm fluid-dynamic bearing fan, which is efficient and long-lasting.
Under low to medium system loads, the PSU can enter Zero RPM mode, turning off the fan entirely and ensuring near-silent operation — an ideal scenario for media builds, silent workstations, or nighttime usage.
In terms of future-proofing: the SF850 is compliant with the ATX 3.1 standard and is ready for PCIe 5.1 GPUs.
It even includes the necessary 12V-to-12VHPWR cable to support modern high-wattage graphics cards, making it suitable for powerful gaming rigs or workstation machines that may require GPU upgrades down the line.
Reliability is assured through high-quality internals: all capacitors are Japanese electrolytic rated for 105 °C, designed to withstand high temperatures and long hours of usage.
The PSU is rated for continuous operation up to 50 °C ambient, which means it can handle demanding workloads or warm climates without compromising stability — a useful feature for users in hotter regions or compact cases with restricted airflow.
The unit’s connector roster is generous, supporting a variety of components: a 24-pin ATX connector for the motherboard; two 4+4-pin EPS/ATX12V connectors for CPU power; three 6+2-pin PCIe connectors plus one 12+4-pin (12VHPWR) connector for GPUs; multiple SATA and Molex ports for drives and accessories.
This makes the SF850 versatile for both modern builds and more legacy-driven systems.
Physical dimensions are 125 × 100 × 63.5 mm, so it’s compact enough for SFF cases.
Despite the small size, the PSU doesn’t compromise on power or performance. Its design, combined with a 7-year warranty and an MTBF rating of 100,000 hours, underlines that this PSU isn’t just for show — it’s built for durability and long-term performance.
The Corsair SF850 80 PLUS Platinum PSU strikes a strong balance between power, efficiency, size, and build quality.
Whether you’re building a compact gaming rig, a small-form-factor workstation, or a powerful upgrade-ready desktop, this PSU delivers reliable, efficient, and quiet power — with flexibility and future-proofing.
