PC Power Supply - 850 W, ATX form factor, 80 PLUS Gold certification, detachable cables, thermal speed control and power switch, 120 mm fan size, 2× EPS/CPU 4+4pin, 1× PCI Express 16-pin, 3× PCI Express 8-pin / 6+2-pin, 6× Serial ATA 15-pin, 3× Molex HDD 4-pin connectors, dimensions 150 × 86 × 140 mm (W×H×D)
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
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.
Clearly specifies the maximum computing power performance in watts (W). The most common values include 400 W but some gaming computers have a 1000 W or more.
The physical dimensions of the source determine its next deployment. For classical computers there is the type ATX, but some miniature cases require a source with smaller dimensions (TFX).
This is a list of other functional equipment of the resource. Desired parameters are primarily detachable cables, thermal fan speed control or completely passive cooling.
Detachable cables, Power switch, Thermal speed control
Clearly specifies the maximum computing power performance in watts (W). The most common values include 400 W but some gaming computers have a 1000 W or more.
The physical dimensions of the source determine its next deployment. For classical computers there is the type ATX, but some miniature cases require a source with smaller dimensions (TFX).
This is a list of other functional equipment of the resource. Desired parameters are primarily detachable cables, thermal fan speed control or completely passive cooling.
Detachable cables, Power switch, Thermal speed control
80 Plus certification program focuses on the selection of power saving resources. According to the results obtained with different load, the source gets awards - Bronze, Silver, Gold, Platinum, Titan...
Each motherboard needs to be powered directly from the source. This item specifies the exact type of used connectors. The most common combination is ATX 24-pin ATX + 4-pin.
12V-2x6 16pin, ATX 24pin, CPU 8pin / 4+4pin, Molex 4pin, PCI-E 8pin / 6+2pin, SATA 15pin
Dobrý den, Koupil jsem si tento zdroj. Vše funguje jak má. Jen se chci zeptat na kabel 600W. Mám ho použít nebo ne. Nepoužil jsem ho a myslím, že to funguje. Mám Grafickou kartu ASUS TUF GeForce RTX 3080 GAMING V2 O10G.
Děkuji předem za názor , odpověď.
Karel
Dobrý den, Koupil jsem si tento zdroj. Vše funguje jak má. Jen se chci zeptat na kabel 600W. Mám ho použít nebo ne. Nepoužil jsem ho a myslím, že to funguje. Mám Grafickou kartu ASUS TUF GeForce RTX 3080 GAMING V2 O10G.
Děkuji předem za názor , odpověď.
Karel
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