Power Supply Seasonic GX-850 CORE GX ATX white SRP-CGX851-A5A32SF-W 80 Plus Gold 750W

Seasonic CORE GX-850 V2 850W ATX 3.1 80+ Gold White Power Supply

Seasonic's CORE GX V2 line targets system builders and enthusiasts who want a sensible mix of price and performance. This 850W unit meets the current ATX 3.1 and PCIe 5.1 standards and ships in a clean white finish that suits bright builds. A fully modular layout keeps only the cables you actually need inside the chassis.

Power & efficiency

A continuous 850W rating in an ATX footprint leaves comfortable headroom for a power-hungry CPU paired with a demanding graphics card. The 80 PLUS Gold rating limits how much energy is lost as heat and helps keep draw from the wall in check under load. ATX 3.1 compliance means the unit is built to absorb the brief power spikes that modern components can generate.

Cables & connectors

The supply includes a native 12V-2x6 cable designed for PCIe 5.1 graphics cards, delivering up to 600W through that single connector. An adapter cable from 12V-2x6 to two PCIe 8-pin plugs is also provided, so earlier-generation cards can be powered without swapping the GPU. Because the design is fully modular, you attach only the leads your system requires, which makes for tidy routing and better airflow.

Reliability & cooling

A 120 mm fan built on a Hydro Dynamic Bearing handles cooling over the long term. Seasonic's Smart and Silent Fan Control matches fan speed to load and temperature, aiming for effective heat removal at the lowest practical noise level. That balance suits machines where quiet operation matters as much as stability under sustained load.

• Output: 850W continuous
• Form factor: ATX
• Efficiency rating: 80 PLUS Gold
• Compatibility: ATX 3.1 and PCIe 5.1
• GPU connector: native 12V-2x6 cable up to 600W
• Cabling: fully modular with 2x PCIe 8-pin adapter
• Cooling: 120 mm HDB fan with smart, quiet control