Seasonic FOCUS GX-850 ATX 3.1 850W 80 Plus Gold Modular PSU

High-Performance 850W Power for Gaming, Workstation and Creator PCs

The Seasonic FOCUS GX-850 ATX 3.1 is a premium fully modular power supply designed for enthusiasts, gamers, content creators and professionals who demand exceptional reliability, high efficiency and future-ready compatibility. Built upon Seasonic's award-winning FOCUS platform, this latest-generation model supports the newest ATX 3.1 and PCIe 5.1 standards, ensuring compatibility with today's powerful graphics cards and tomorrow's hardware upgrades.

Featuring 80 Plus Gold certification, advanced Hybrid Silent Fan Control, a durable Fluid Dynamic Bearing fan, premium modular cabling and industry-leading build quality, the FOCUS GX-850 provides dependable performance for demanding gaming and workstation environments.

Key Features & Benefits

Reliable 850W Continuous Power

Delivering 850W of continuous power, the FOCUS GX-850 is ideal for powering modern high-performance systems.

Perfect for:

• High-end gaming PCs
• Streaming systems
• Content creation workstations
• Professional productivity builds
• AMD Ryzen gaming systems
• Intel Core i7 and i9 platforms
• Multi-drive storage configurations

Its strong +12V rail delivers up to 840W, providing stable power for performance CPUs and graphics cards.

ATX 3.1 & PCIe 5.1 Ready

Built to meet the latest industry standards, the FOCUS GX-850 supports:

• ATX 3.1 Compliance
• PCIe 5.1 Compatibility
• Improved Power Excursion Handling
• Modern GPU Requirements
• Future Hardware Upgrades

Designed to support current and next-generation graphics cards with confidence.

80 Plus Gold Certified Efficiency

The FOCUS GX-850 achieves 80 Plus Gold certification, ensuring highly efficient power conversion.

Benefits include:

• Lower power consumption
• Reduced heat generation
• Higher overall efficiency
• Reduced operating costs
• Improved long-term reliability

Ideal for systems running intensive workloads over extended periods.

Fully Modular Cable Design

The fully modular design allows users to install only the required cables.

Advantages include:

• Cleaner cable management
• Improved airflow
• Easier installation
• Reduced cable clutter
• Simpler future upgrades

Perfect for custom gaming PCs and professional workstation builds.

Premium Individual Braided Cables

Featuring high-quality individually sleeved braided cables for improved aesthetics and flexibility.

Benefits:

• Cleaner internal appearance
• Easier cable routing
• Enhanced airflow
• Professional build quality

Suitable for both showcase systems and minimalist builds.

Hybrid Silent Fan Control

Seasonic's patented Hybrid Silent Fan Control intelligently balances cooling and acoustics through three operating stages.

Fanless Mode

The fan remains off during low-load operation, delivering silent performance.

Silent Mode

Under moderate loads, the fan spins quietly to maintain optimal temperatures.

Cooling Mode

When system demand increases, fan speed adjusts automatically to provide efficient cooling.

This intelligent control system helps maintain excellent thermal performance while minimising noise.

Premium Fluid Dynamic Bearing Fan

The high-quality Fluid Dynamic Bearing (FDB) fan offers exceptional durability and quiet operation.

Advantages include:

• Reduced vibration
• Lower noise levels
• Improved cooling efficiency
• Longer lifespan
• Greater reliability than standard bearing designs

Rated for up to 50,000 hours of operation.

Trusted Seasonic Engineering

The FOCUS series is widely recognised for its outstanding reliability and performance.

Key benefits include:

• Premium internal components
• Excellent voltage regulation
• Proven long-term stability
• High manufacturing standards
• Exceptional power delivery consistency

Comprehensive Protection Features

Industrial-grade protection technologies help safeguard both the power supply and connected hardware.

Protection Includes:

• OPP (Over Power Protection)
• OVP (Over Voltage Protection)
• UVP (Under Voltage Protection)
• OCP (Over Current Protection)
• OTP (Over Temperature Protection)
• SCP (Short Circuit Protection)

Providing peace of mind for high-value PC components.

Ideal For

✅ High-End Gaming PCs
✅ RTX 4070 Ti / RTX 4080 / RTX 5080 Systems
✅ AMD Ryzen 7 & Ryzen 9 Builds
✅ Intel Core i7 & i9 Systems
✅ Content Creation Workstations
✅ Streaming PCs
✅ Professional Productivity Systems
✅ Future PCIe 5.1 Upgrades

Technical Specifications

General

• Brand: Seasonic
• Model: FOCUS GX-850 ATX 3.1
• Part Number: FOCUS-GX-850-V4
• Colour: Black
• Form Factor: ATX / EPS

Power

• Total Continuous Power: 850W
• 80 Plus Gold Certified

Electrical Specifications

• Input Voltage: 100V - 240V
• Input Current: 12A - 6A
• Frequency Range: 50Hz - 60Hz
• Full Range AC Input

Cooling

• 120mm Fan
• Fluid Dynamic Bearing (FDB)
• S3FC Hybrid Silent Fan Control
• Fanless Mode Support
• Fan Life Expectancy: 50,000 Hours

Reliability

• MTBF: 100,000 Hours

Cable Design

• Fully Modular
• Individual Braided Cables

Protection Features

• OPP
• OVP
• UVP
• OCP
• OTP
• SCP

Power Distribution

Total Continuous Power: 850W

Dimensions

• 140 x 150 x 86mm

Operating Temperature

• 0°C to 40°C

Certifications

• 80 Plus Gold
• CE
• CB
• TUV
• cTUVus
• CCC
• BSMI
• EAC

Environmental Compliance

• Energy Star
• RoHS
• WEEE
• REACH
• ErP Lot 6

Warranty

• Manufacturer Warranty: 10 Years*

*The product title references a 12-year warranty; however, the supplied manufacturer specifications list a 10-year warranty.

What's in the Box?

• Seasonic FOCUS GX-850 Power Supply
• Fully Modular Cable Set
• CPU Power Cables
• PCIe Power Cables
• Motherboard Power Cable
• Mounting Screws
• User Documentation

Why Choose the Seasonic FOCUS GX-850?

The Seasonic FOCUS GX-850 ATX 3.1 offers an outstanding combination of performance, efficiency and reliability for modern PC builders. With 850W of continuous power, 80 Plus Gold efficiency, ATX 3.1 and PCIe 5.1 support, advanced Hybrid Silent Fan Control, and a fully modular cable design, it provides the ideal foundation for powerful gaming systems and professional workstations. Backed by Seasonic's renowned engineering quality and long-term durability, the FOCUS GX-850 is a dependable choice for users seeking premium power delivery and quiet operation.