Corsair SF850 (850W) SFX 80 Plus Platinum ATX 3.1, Fully Modular - CP-9020256-EU

Corsair SF850 is a compact SFX power supply with 850W power and 80+ Platinum certification – a combination rarely seen in such a small format. It is aimed at more demanding mini-ITX and compact builds, where there is no room for a large ATX PSU, but you want a serious system with a powerful GPU. Full modularity gives you a clean internal look and better airflow, while efficiency of up to 94% helps reduce consumption and heat. Add to that ATX 3.0/3.1 support with PCIe Gen 5.0/5.1 and you have a current standard ready for modern graphics cards.

What you get

With a power of 850W, you have enough resources for a serious gaming or creator build in a small case, including with high-end GPU and multi-core CPU, without the PSU becoming a bottleneck. Support for ATX 3.0/3.1 and PCIe Gen 5.0/5.1 plus 1x 16-Pin PCIe 5.1 12V-2x6 connector with up to 600W output for GPU means you can comfortably power current and future graphics cards with a single cable. Full modularity allows you to use only the necessary cables – important in SFX cases where every centimeter inside matters for airflow and easy organization. A 92mm PWM fan takes care of cooling according to the load, so the PSU doesn't generate excessive noise under light to medium load. The operating range of 100 – 240 VAC makes it suitable for any electrical installations and stable operation under various conditions.

• Power 850W – sufficient for high-end GPU and powerful CPU in a compact SFX configuration without worries about power shortages.
• 80+ Platinum efficiency (up to 94%) – less energy loss as heat, lower consumption, and quieter operation under the same load.
• SFX format with dimensions 100 x 125 x 63.5 mm – ideal for mini-ITX and small cases where standard ATX power supplies simply do not fit.
• Full modular cabling – connect only the necessary cables for a cleaner internal look and better airflow.
• 1x 16-Pin PCIe 5.1 12V-2x6 (600W) + 3x 6/8-Pin PCIe – ready for modern and future graphics cards, plus options for multiple PCIe devices.
• Rich set of connectors – 1x 20/24-Pin, 2x 4/8-Pin ATX12V, 8x SATA and 3x IDE cover both modern SSD/HDD and older hardware.
• 92mm PWM fan and Active PFC – more stable power supply and intelligent cooling management according to the load.
• Long warranty of 120 months – 10 years of peace of mind for a component that is critical to your entire build.

Who it is suitable for

This power supply is suitable if you are planning a compact yet powerful system – mini-ITX or small microATX build with a current high-end GPU and want to keep up with ATX 3.1 and PCIe Gen 5. If you are aiming for an ultra-budget computer or a large mid-tower with more modest hardware, you probably won't be using its full potential and can look towards a lower-class PSU.

The combination of SFX format, 850W power, 80+ Platinum efficiency, and modern ATX 3.1 / PCIe 5.1 connectors makes Corsair SF850 a very strong choice for a serious, compact build that you won't be replacing anytime soon.