SeaSonic Focus GX-850 ATX 3.1 White

The SeaSonic Focus GX-850 ATX 3.1 White is a fully modular 850 W ATX power supply designed for modern gaming systems in light or contrasting builds where compact size, native connectivity for new graphics cards, and managed cooling are essential. The FOCUS GX White ATX 3.1 series complies with ATX 3.1 and PCIe 5.1 standards, features a depth of just 140 mm, a 135 mm fan with FDB bearing, a new OptiSink internal layout, and a native 12V-2x6 cable for modern GPUs. The SeaSonic Focus GX-850 ATX 3.1 White delivers up to 70 A on the +12 V rail, equaling 840 W, while the +3.3 V and +5 V rails combined provide 100 W. The connector set includes a 24-pin ATX, two EPS/CPU 4+4-pin, one 16-pin 12V-2x6, three PCIe 6+2-pin, eight SATA, and three Molex connectors, making the unit suitable for systems with a single high-end graphics card as well as workstations with multiple storage drives. From a technical standpoint, the unit is certified 80 PLUS Gold, and Cybenetics testing showed average efficiency of 89.03% at 115 V and 91.30% at 230 V, with a noise level around 28.4 dBa. The unit also supports semi-passive fan mode and a standard suite of protections against overload, overheat, short circuit, overvoltage, and voltage sag. The SeaSonic Focus GX-850 ATX 3.1 White is worth considering for builds requiring 850 W of headroom, compact depth, and compatibility with new graphics cards without adapters.