Overview

The Seasonic FOCUS GX-850 ATX3 (V4) - White is an 850W fully modular ATX power supply with 80PLUS GOLD certification. It supports the latest ATX 3.1 and PCIe 5.1 standards and includes a native 12V-2x6 cable. Its compact 140mm depth houses a 135mm fluid dynamic bearing (FDB) fan for quiet and efficient cooling. All capacitors are Japanese 105°C rated, ensuring long-term reliability. With a 10-year warranty, this PSU is built to last. The white version matches white-themed PC builds perfectly. OptiSink technology improves heat dissipation, while digital hybrid fan control offers fanless, silent, and cooling modes to adapt to load. This unit is ideal for mid-range to high-end gaming PCs and workstations, providing stable power and clean aesthetics.

Compatibility Guide

The FOCUS GX-850 ATX3 is a standard ATX power supply (140mm deep × 150mm wide × 86mm high) that fits most PC cases. It is fully compliant with ATX 3.1, making it a perfect match for modern GPUs like the NVIDIA GeForce RTX 40/50 series. The included native 12V-2x6 cable eliminates the need for adapters. It also works with older ATX 2.x motherboards, so upgrades from legacy systems are straightforward. Dual CPU 4+4 pin EPS12V connectors support high-end processors such as Ryzen 9 or Core i9. Multiple PCIe 6+2 pin connectors allow for multi-GPU configurations or high-power single GPUs. SATA and Molex cables are also provided for storage and peripherals.

Product Info

Released in late 2024, the FOCUS GX-850 ATX3 (V4) White carries the 80PLUS GOLD certification, achieving over 90% efficiency at 50% load. This reduces electricity costs and heat output. It is positioned as a mid-range to high-end PSU, suitable for gaming PCs, creative workstations, and upgrade builds. The 10-year warranty and official Japanese distributor support add peace of mind. Key specs: 850W rated output, single +12V rail, 135mm FDB fan, fully modular cabling, all Japanese 105°C capacitors. The compact 140mm depth improves case airflow and simplifies installation.

Best Use Cases

  • Gaming PC Builds: Ideal for systems with an RTX 4070 Ti SUPER / RTX 5080 and a Ryzen 7 / Core i7. ATX 3.1 compliance handles transient power spikes from modern GPUs. The white color fits white-themed rigs perfectly. - Creative Workstations: For video editing, 3D rendering, and other sustained high loads, the high efficiency and Japanese capacitors ensure stable long-term operation. Modular cables keep the interior tidy and improve airflow. - Silence-Oriented Users: The digital hybrid fan control offers a fanless mode at low loads, minimizing noise during everyday tasks. Perfect for those who prioritize a quiet environment.

Things to Consider

Although the FOCUS GX-850 provides 850W, it may have limited headroom for extremely high-end configurations like an RTX 5090 or RX 7900 XTX, especially with overclocking or many storage drives. In such cases, a 1000W+ unit is recommended. The white model is often priced slightly higher and may have lower stock availability than the black version. Cable length may be insufficient for full-tower cases; extension cables could be required. Additionally, check your GPU's power connector requirements—while the included 12V-2x6 cable covers most newer cards, some may need multiple PCIe cables. Verify compatibility before purchase. Competitors include the Corsair RM850x and be quiet! Straight Power 12. The Seasonic FOCUS GX-850 ATX3 stands out for its compact 140mm size, 10-year warranty, and Japanese capacitors. However, some users may find its fan noise slightly higher than the quietest alternatives at equivalent loads, so review independent noise tests if silence is your top priority.