Key Specifications
Choose one or multiple features to search for items that have the same specifications.| Ports & interfaces | |
| PCI Express connector | ![]() |
| Motherboard power connector | 20+4 pin ATX |
| Number of SATA power connectors | 8 |
| Peripheral (Molex) power connectors (4-pin) | 4 |
| EPS power connector (8-pin) | ![]() |
| ATX power connector (20+4 pin) | ![]() |
| PCI Express power connectors (8-pin) | 4 |
| CPU power connector (4+4 pin) | ![]() |
| PCI Express power connectors (6+2 pin) | 4 |
| Cabling type | Fully-Modular |
| Motherboard power cable length | 60 cm |
| SATA power cable length | 500,650,800,950 mm |
| Peripheral (Molex) power cable length | 500,650,800,950 mm |
| PCI Express power connectors (12+4 pin) | 1 |
| PCI Express power connectors (12+4 pin) cable length | 600 mm |
| Weight & dimensions | |
| Weight | 2.62 kg |
| Height | 86 mm |
| Width | 150 mm |
| Depth | 140 mm |
| Energy management | |
| Peak power | 850 W |
| Input current | 10 A |
| Nominal power | 850 W |
| Power protection features | No load operation, Over current, Over power, Over voltage, Short circuit, Surge & inrush protection (SIP), Under voltage |
| Power Factor Correction (PFC) type | Active |
| Combined power (+3.3V) | 100 W |
| Combined power (+12V) | 849.6 W |
| Combined power (+5V) | 100 W |
| Combined power (-12V) | 3.6 W |
| Combined power (+5Vsb) | 15 W |
| Max output current (+3.3V) | 20 A |
| Max output current (+12V) | 70.8 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 - 40 °C |
| Packaging data | |
| Package weight | 2.84 kg |
| Package depth | 296 mm |
| Package height | 130 mm |
| Package width | 203 mm |
| Package type | Box |
| Certificates | |
| Certification | cTUVus / TUV / CB / RCM / CE / FCC / BSMI / KC / UKCA / ICES |
| RoHS compliance | ![]() |
| 80 PLUS certification | 80 PLUS Gold |
| Design | |
| Product colour | Black |
| Illumination | ![]() |
| Number of fans | 1 fan(s) |
| On/off switch | ![]() |
| Cooling type | Active |
| Fan diameter | 12 cm |
| Fan location | Top |
| Performance | |
| Form factor | ATX |
| Purpose | PC |
| Supported motherboard form factors | ATX |
| ATX version | 3.1 |
| 80 PLUS certification | 80 PLUS Gold |
| Silent mode | ![]() |
| Power supply unit (PSU) form factor | ATX |
| EAN | 0761345200509 |
The Antec GSK ATX3.1 is an 850-watt power supply unit designed for desktop systems requiring stable and efficient power delivery. It is compliant with the ATX 3.1 and PCIe 5.1 standards, ensuring compatibility with current-generation components, including graphics cards that use a 12VHPWR connector. The 80 PLUS Gold certification indicates a high level of efficiency, which translates to reduced energy consumption and lower heat output during operation. Its fully modular cabling system allows users to connect only the necessary cables, which can aid in system assembly and improve internal airflow.
Cooling is managed by a single 120 mm fan that provides active airflow over the internal components. The unit's standard ATX form factor and 140 mm depth ensure it fits within a wide range of computer cases. For operational safety and component protection, the power supply incorporates a suite of protective circuits, including safeguards against overloads, short circuits, and undervoltage events. It also features Active Power Factor Correction (PFC) to regulate voltage and enhance power delivery efficiency across different loads.
Key Features:- Delivers 850W of total power
- Features 80 PLUS Gold efficiency certification
- Utilizes a fully modular cable design
- Meets ATX 3.1 and PCIe 5.1 specifications
- Equipped with a 120 mm cooling fan
- Includes eight SATA power connectors
- Provides four 6+2 pin PCIe connectors
- Measures 150 x 140 x 86 mm
Estimated delivery: 22.12 - 24.12
Today: 10:00 - 18:00
Estimated delivery: 22.12 - 24.12
Today: 09:00 - 17:00
Estimated delivery: 22.12 - 24.12
Today: 10:00 - 17:00
Estimated delivery: 22.12 - 24.12
Today: 10:00 - 18:00
Estimated delivery: 22.12 - 24.12
Today: 10:00 - 17:00
Estimated delivery time: 22.12 - 24.12
Estimated delivery time: 23.12 - 24.12
Estimated delivery time: 22.12 - 23.12
Estimated delivery time: 23.12 - 24.12
Estimated delivery time: 23.12
Estimated delivery time: 22.12 - 24.12
Estimated delivery time: 22.12 - 24.12
Estimated delivery time: 23.12
- leaflet (English)


