Seasonic FOCUS GX-850 V4 PSU ATX 3.1 850W Gold

Seasonic FOCUS GX-850 V4 is an 850W modular ATX power supply from the higher mid-range, aimed at serious gaming and workstation configurations. With 80+ Gold certification and up to 90% efficiency under load, it is designed to keep the system stable and relatively quiet under load. Support for ATX 3.0/3.1 and PCIe Gen 5.0/5.1 prepares you for modern and future graphics cards. Combined with a 135mm FDB fan, this power supply balances reliability, efficiency, and acoustics.

What you get is a power supply that can easily handle high-end GPUs and powerful CPUs, without worrying about a lack of cables or unstable voltages. With a PCI-E Gen5 12VHPWR connector and three standard PCI-Express 6+2 pin connectors, you have the freedom to power both modern and older graphics cards. The eight SATA and three Molex connectors cover SSDs, HDDs, fan hubs, and additional accessories in a more serious build. The modular design allows you to use only the necessary cables, which simplifies cable management and improves airflow. Active PFC and the wide input range of 100–240 VAC help for more stable operation during fluctuations in mains voltage.

• Power 850W – sufficient for powerful gaming configurations with high-end GPUs and multi-core CPUs, without reaching the power supply's limit under peak loads.
• 80+ Gold certification and up to 90% efficiency – less loss as heat, lower consumption from the outlet, and quieter fan operation under typical loads.
• ATX 3.0/3.1 and PCIe Gen 5.0/5.1 support – ready for modern and upcoming generations of graphics cards and components, compliant with new standards for peak loads.
• PCI-E Gen5 12VHPWR + 3 x PCI-Express 6+2 pin – flexibility to power both new GPUs with a single cable and older models with several separate connectors.
• 8 x SATA and 3 x Molex – enough lines for multiple SSDs, HDDs, RGB controllers, and fan hubs in more complex configurations.
• 135mm FDB fan – lower noise and better durability compared to standard bearings, especially under long loads.
• Modular design and ATX format – easy installation in standard cases and a cleaner internal look, as you only connect the necessary cables.

Who it is suitable for: if you are building a mid-range to high-end gaming or creative configuration with a modern graphics card and want a power supply that won't need to be replaced with the next upgrade, this model is a logical choice. It is also suitable for quieter systems, where efficiency and the larger fan help reduce noise. It is not the most logical solution only if you are doing a very budget build with low consumption, where 850W would be excessive.

The combination of 850W power, 80+ Gold efficiency, and ATX 3.1 + 12VHPWR connector makes the Seasonic FOCUS GX-850 V4 a stable foundation for a current and future high-end build. You get a power supply with which you can confidently plan upgrades for the coming years.