Seasonic Core GX-850 ATX 3.1
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Seasonic Core GX-850 ATX 3.1
The Seasonic Core GX-850 ATX 3.1 computer power supply powers modern gaming and professional builds with high stability demands. It provides a total output of 850W and meets the ATX 3.1 standard specifications for seamless operation with high-performance components. Thanks to its fully modular cabling, you only connect the necessary wires, which simplifies the internal layout of the case and promotes efficient airflow. The 80 PLUS Gold certification confirms high efficiency in converting electrical energy and contributes to lower waste heat production and an overall reduction in running costs. This power supply is aimed at PC enthusiasts and system builders who are looking for reliability and advanced features.
850 W
Power
ATX 3.1
Format
80 PLUS Gold
Certification
Fully
Modularity
Key technologies of the Seasonic Core GX-850 ATX 3.1 computer power supply
- Provides a stable power output
- Fully modular cable system for easy routing and organisation
- 80 PLUS Gold certification for proven energy conversion efficiency
- Native 12V-2x6 connector powers PCIe 5.1 graphics cards
- S2FC technology maintains low noise levels under lighter loads
- Fluid dynamic fan bearing ensures reliable operation
- A complete set of electrical protections safeguards your build
- OptiSink PCB design improves airflow
Choosing a power supply
When choosing a suitable PC power supply, the key parameter besides the format is its power output. This indicates the maximum number of Watts the power supply can continuously deliver to the components in your computer. It is advisable to use a web-based calculator to work out the optimal power output based on your chosen components.
ATX 3.1 standard of the Seasonic Core GX-850
The power supply fully complies with the requirements of the ATX 3.1 specification, which defines stricter rules for handling the high power spikes typical of NVIDIA RTX 40 series and future generation graphics cards. It includes a native 12V-2x6 connector for directly powering PCIe 5.1 standard graphics cards with up to 600W. This eliminates the need for unreliable adapters and increases both the stability and safety of the power delivery.
Cable management with the Seasonic Core GX-850
The fully modular cabling system gives you control over the internal space of your PC case. You only connect the cables your build requires. The result is a cleaner look and unrestricted airflow, which helps to cool all components. The detachable cables also simplify the installation process and any future upgrades to your build.
Intelligent fan control
Smart and Silent Fan Control (S2FC) technology actively regulates the speed of the 120mm fan to achieve an optimal balance between cooling and quiet operation. Under low and medium loads, it keeps the fan in a passive or low-speed mode. The speed increases smoothly only at higher power draws, allowing the power supply to maintain low noise levels without compromising the cooling performance of key components.
80 PLUS Gold efficiency of the 850W power supply
The 80 PLUS Gold certification is proof of high energy efficiency. At 50% load, the power supply's efficiency reaches up to 90%, meaning only 10% of the energy is converted into unwanted heat. Higher efficiency means less wasted energy and lower operating temperatures. This leads to reduced cooling demands, quieter fan operation, and direct savings on your electricity bills.
OptiSink technology
The printed circuit board construction utilises the OptiSink design, which is the result of an innovative PCB layout and automated manufacturing. This solution optimises the placement of MOSFETs and heatsinks, thereby improving their thermal management and the airflow inside the power supply. More effective heat dissipation from critical points contributes to overall stability and operational reliability, even under heavy loads.
Comprehensive set of protections for the Seasonic 850W
The power supply integrates a complete set of electrical protections that actively safeguard connected components from damage in the event of abnormal operating conditions. These protective mechanisms constantly monitor voltage, current, and temperature, and will instantly cut the power in case of an anomaly. The set includes Over Voltage Protection (OVP), Under Voltage Protection (UVP), Over Current Protection (OCP), Over Power Protection (OPP), Short Circuit Protection (SCP), and Over Temperature Protection (OTP).
Connecting older graphics cards
In addition to the native connector for the PCIe 5.1 standard, the package also includes an adapter from 12V-2x6 to two 8-pin PCIe connectors. This element expands the options for connecting older graphics cards. The power supply thus offers backward compatibility and flexibility for builds with different generations of hardware, making it easier to gradually upgrade your computer.
Durable fan in the ATX 3.1 power supply
Cooling is handled by a 120mm fan equipped with a fluid dynamic bearing (FDB). This type of bearing uses an oil film that minimises friction and vibration between moving parts. The result is significantly quieter operation and a longer service life compared to standard sleeve or ball bearings, which contributes to the overall reliability of the power supply throughout its use.
Connectors
- 1× ATX 24-pin
- 2× CPU 4+4-pin
- 1× 12V-2x6 16-pin
- 3× PCI-E 6+2-pin
- 6× SATA 15-pin
- 3× Molex 4-pin
Package contents
- PC power supply
- 1× Power cable
- 1× ATX 24-pin (20+4)
- 2× CPU 8-pin (4+4)
- 2× PCI-E 8-pin (6+2)
- 2× SATA 15-pin
- 1× Molex 4-pin
- 1× 12V-2x6 16-pin (12+4)
80 Plus certification in the European market
The 80 Plus certification was created to objectively assess the efficiency of PC power supplies. It gives users a simple and clear way to compare different models. On the European market (which uses a 230V voltage), there are six levels of 80 Plus certification with set requirements for PC power supplies. Higher energy efficiency primarily means lower energy consumption.
| PC power supply load | Efficiency at 20% load | Efficiency at 50% load | Efficiency at 100% load |
|---|---|---|---|
| 80 PLUS | 82 % | 85 % | 82 % |
| 80 PLUS Bronze | 85 % | 88 % | 85 % |
| 80 PLUS Silver | 87 % | 90 % | 87 % |
| 80 PLUS Gold | 90 % | 92 % | 89 % |
| 80 PLUS Platinum | 92 % | 94 % | 90 % |
| 80 PLUS Titanium | 94 % | 96 % | 94 % |
Specifications
Performance and format
Equipment
Efficiency
Connectors
Cooling system
Dimensions
| Code: | UEcgx5 |
| Warranty: | 84 months |
| Links: | Producer's Website: |
| Manufacturer information |
Sea Sonic Europe BV, Rietveld 7, 5258 ED Berlicum, Netherlands [email protected] 
|