Power supply Seasonic CORE BC-850 PSU ATX 3.1 850W Bronze, PCIe 5.1 - SRP-CBC851-A5A51JF

Seasonic CORE BC-850 is an ATX power supply with a power of 850W, aimed at mid-range to high-end gaming and workstation configurations where you want stability without unnecessary luxury. It has an 80+ Bronze certification and efficiency up to 85%, which is a good balance between price, heating, and electricity bills. It supports ATX 3.0/3.1 and PCIe Gen 5.0/5.1, so you are ready for modern graphics cards with the new connector. The format is standard ATX, in black color and without RGB – a clean, simple, and functional design.

What you get

With a power of 850W, you have enough resources for a more serious CPU and powerful GPU, plus several additional devices without worrying if the power supply will be sufficient. The only lines that matter to you in real operation – DC 3.3/5/±12 V – are designed for stable power delivery to the motherboard, memory, storage, and graphics card. Thanks to Active PFC, the power supply operates more efficiently across a wide input range of 100 - 240 VAC and reduces excess losses and noise in the electrical network. A 120 mm fan is built-in to take care of cooling – a larger fan means lower RPM for the same airflow and less noise under typical load. It is non-modular, which simplifies the construction and reduces the number of potential weak points in cable connections.

• Power 850W – sufficient for serious gaming and workstation systems with a powerful GPU and multi-core CPU, plus several drives and additional fans.
• 80+ Bronze certification and 85% efficiency – less loss as heat and more stable operation under normal loads compared to non-certified solutions.
• ATX 3.0/3.1 and PCIe Gen 5.0/5.1 – compatibility with the new generation of graphics cards and higher peak loads without overloading the power supply.
• PCI-E 5.1 x 1 and PCI-Express 6+2 pin x 3 – flexibility to power a modern card with a new connector or several older GPUs/additional devices.
• 20+4 Pin ATX x 1 and 4+4 Pin ATX/EPS x 2 – full compatibility with current motherboards, including more serious models with additional CPU connectors.
• SATA x 2 and Molex x 1 – sufficient for a basic to mid-range configuration with several SSD/HDD and one older peripheral component or fan controller.
• Active PFC and input 100 - 240 VAC – more stable operation under varying quality of power supply and better energy efficiency.
• 120 mm fan and non-modular design – a simpler, reliable construction with decent cooling and fewer points of failure in the cables.

Who it is suitable for

This power supply is suitable if you are building a gaming or workstation PC from mid to high class and want a secure foundation for more powerful components, including next-generation GPUs with PCIe 5.1 connector. It is also suitable for upgrading older systems when planning to switch to a more modern graphics card, but you do not need modular cabling or RGB extras. If you are aiming for maximum efficiency of the 80+ Gold/Platinum type and passive or super quiet cooling, you may not find exactly that here.

The combination of 850W power, ATX 3.1 / PCIe Gen 5.1 support, and a practical set of connectors makes Seasonic CORE BC-850 a very sensible choice for a stable build that will not limit you in future upgrades.