Power Supply Seasonic Focus GX-850 ATX SRP-FGX851-A5A32SF 80 Plus Gold 850W

Seasonic Focus V4 GX-850 850W ATX 3.1 80+ Gold Power Supply

Seasonic's FOCUS GX line carries on the long-running FOCUS legacy, and in its V4 revision it has been upgraded to meet the ATX 3.1 and PCIe 5.1 standards. This 850W unit holds an 80 PLUS Gold rating and is meant to drive next-generation, power-hungry graphics cards and processors. Every unit includes a large 135 mm fan and the new OptiSink technology.

Power & efficiency

An 850W output in an ATX footprint is matched to modern systems running demanding components. The 80 PLUS Gold rating reduces energy wasted as heat and helps keep draw moderate under load. Building to the ATX 3.1 standard lets the unit cope with the brief power surges typical of newer hardware.

Cables & connectors

Seasonic's FOCUS ATX 3 line was designed and built to power new PC components that call for the ATX 3.1 and PCIe 5.1 standards. To that end the unit includes a PCIe Gen 5 16-Pin cable of the 12V-2x6 type, intended for a direct connection to current-generation graphics cards. That link allows an installation aligned with the latest standards for power-hungry cards and processors.

Reliability & cooling

Cooling relies on a large 135 mm fan that delivers generous airflow even under load. The new OptiSink technology is built into the thermal design to improve how heat is dissipated inside the unit. The combination aims at stable operation over time for next-generation systems.

• Output: 850W
• Form factor: ATX
• Efficiency rating: 80 PLUS Gold
• Compatibility: ATX 3.1 and PCIe 5.1
• GPU connector: PCIe Gen 5 16-Pin (12V-2x6) cable
• Cooling: 135 mm fan
• Thermal technology: OptiSink