The Seasonic FOCUS GX V4 850W is a premium fully modular ATX 3.1 power supply designed for modern gaming PCs, workstations and high-performance systems. It combines 80 PLUS Gold efficiency with PCIe 5.1 support, native 12V-2x6 connectivity and Seasonic's OptiSink thermal design. A large 135mm Fluid Dynamic Bearing fan works with Digital Hybrid Fan Control to provide an excellent balance of quiet operation and thermal performance, while the compact 140mm chassis simplifies installation.

Key Features
80 PLUS Gold (90% efficiency at 50% system load).
ATX 3.1 and PCIe 5.1 support.
Native 12V-2x6 connectivity for modern graphics cards.
Fully Modular cable design.
135mm Fluid Dynamic Bearing (FDB) fan.
Digital Hybrid Fan Control with Fanless, Silent and Cooling modes.
Seasonic OptiSink thermal design for improved heat dissipation.
Comprehensive OCP, OPP, OTP, OVP, SCP and UVP protection.
10-year manufacturer's warranty.

Full Specification
Model:
FOCUS GX V4 850W ATX 3.1

Manufacturer Part Number:
FOCUS-GX-850-V4

Output Power:
850W continuous power

Efficiency:
80 PLUS Gold (90% efficiency at 50% system load)

Voltage Rails:
Single +12V rail

+12V Output:
70A / 840W

ATX Form Factor:
ATX/EPS

ATX Standard:
ATX 3.1

PCIe Standard:
PCIe 5.1

Cabling:
Fully Modular

Connectors:
1 x 20+4-pin ATX
2 x 4+4-pin CPU/EPS
1 x 12V-2x6 (12+4-pin)
3 x 6+2-pin PCIe
8 x SATA
3 x 4-pin Molex

Fan:
135mm Fluid Dynamic Bearing (FDB) fan

Fan Speed Control:
Digital Hybrid Fan Control with Fanless, Silent and Cooling modes

Power Input:
100-240V AC, 50/60Hz

Operating Temperature:
0-50°C

Power Output:
DC outputs: +12V, +5V, +3.3V, -12V and +5VSB

Cable Set:
Individual black cables with braided pattern

Protection:
OCP - Over Current Protection
OPP - Over Power Protection
OTP - Over Temperature Protection
OVP - Over Voltage Protection
SCP - Short Circuit Protection
UVP - Under Voltage Protection

Special Features:
Seasonic OptiSink thermal design, native PCIe 5.1 12V-2x6 connectivity, compact 140mm chassis

Warranty:
10-year manufacturer's warranty

Dimensions without cable (L x W x H), (mm)
140 x 150 x 86