Seasonic CORE GX ATX 3.1 850W - PSU, 80 Plus Gold
Key Specifications
Choose one or multiple features to search for items that have the same specifications.| Ports & interfaces | |
| PCI Express connector | ![]() |
| Number of SATA power connectors | 6 |
| EPS power connector (8-pin) | ![]() |
| ATX power connector (20+4 pin) | ![]() |
| PCI Express power connectors (8-pin) | 3 |
| CPU power connector (4+4 pin) | ![]() |
| PCI Express power connectors (6+2 pin) | 1 |
| Cabling type | Fully-Modular |
| Number of PATA power connectors | 2 |
| SATA power cable length | 690 mm |
| CPU power cable length | 700 mm |
| Weight & dimensions | |
| Height | 86 mm |
| Width | 150 mm |
| Depth | 140 mm |
| Energy management | |
| Input current | 9 A |
| Nominal power | 850 W |
| Power protection features | Over current, Over power, Under voltage, Over total voltage, Over voltage, Short circuit |
| Combined power (+3.3V) | 100 W |
| Combined power (+12V) | 840 W |
| Combined power (-12V) | 3.6 W |
| Combined power (+5Vsb) | 15 W |
| Max output current (+3.3V) | 20 A |
| Max output current (+12V) | 70 A |
| Max output current (+5V) | 20 A |
| Max output current (-12V) | 0.3 A |
| Max output current (+5Vsb) | 3 A |
| AC input frequency | 50/60 Hz |
| AC input voltage | 100 - 240 V |
| Total power | 850 W |
| Operational conditions | |
| Operating temperature (T-T) | 0 - 50 °C |
| Packaging data | |
| Package type | Box |
| Certificates | |
| Certification | BSMI, C-tick, CB, CCC, CE, cTUVus, EAC, FCC, TUV, UKCA |
| RoHS compliance | ![]() |
| 80 PLUS certification | 80 PLUS Gold |
| Packaging content | |
| Cables included | AC, Peripheral (Molex) to SATA 3.3, CPU, PCIe, SATA |
| Design | |
| Product colour | Black |
| Illumination | ![]() |
| Number of fans | 1 fan(s) |
| On/off switch | ![]() |
| Cooling type | Active |
| Fan diameter | 12 cm |
| Performance | |
| Mean time between failures (MTBF) | 100000 h |
| Form factor | ATX |
| Purpose | PC |
| ATX version | 3.1 |
| 80 PLUS certification | 80 PLUS Gold |
| Silent mode | ![]() |
| Power supply unit (PSU) form factor | ATX |
| EAN | 4711173878476 |
The Seasonic CORE GX ATX 3.1 is an 850-watt power supply unit engineered for modern computer systems. It operates with 80 PLUS Gold certified efficiency, ensuring minimal wasted energy during power conversion. The design complies with the latest ATX 3.1 and PCIe 5.1 specifications, making it a forward-compatible choice for new builds. It includes a native 12V-2x6 connector to directly support contemporary high-performance graphics cards, alongside standard motherboard and peripheral connections.
A 120 mm fan manages thermal performance, utilizing Seasonic’s Smart and Silent Fan Control to adjust fan speed based on system load and temperature. This function helps to balance effective cooling with low acoustic output during operation. The fully modular design allows users to connect only the necessary cables, which simplifies the build process and can improve internal airflow. Its 140 mm depth fits within the standard ATX footprint, ensuring compatibility with a wide range of enclosures.
Key Features:- Provides 850W total power output
- Features 80 PLUS Gold certification
- Utilizes a fully modular cabling system
- Built on the ATX 3.1 standard
- Includes one 12V-2x6 and three 8-pin PCIe connectors
- Equipped with a 120 mm fan with intelligent speed control
- Incorporates OCP, OPP, OTP, OVP, SCP, and UVP protections
- Measures 150 x 140 x 86 mm (W x D x H)
Estimated delivery: 22.12 - 23.12
Today: 10:00 - 18:00
Estimated delivery: 22.12 - 23.12
Today: 09:00 - 17:00
Estimated delivery: 22.12 - 23.12
Today: 10:00 - 17:00
Estimated delivery: 22.12 - 23.12
Today: 10:00 - 18:00
Estimated delivery: 22.12 - 23.12
Today: 10:00 - 17:00
Estimated delivery time: 22.12 - 23.12
Estimated delivery time: 23.12
Estimated delivery time: 22.12
Estimated delivery time: 23.12
Estimated delivery time: 23.12
Estimated delivery time: 22.12 - 23.12
Estimated delivery time: 22.12 - 23.12
Estimated delivery time: 23.12


