Seasonic CORE GC-850 ATX 3.1 power supply unit 850 W 24-pin ATX Black
Seasonic CORE GC-850 ATX 3.1, 850 W, 100 - 240 V, 50/60 Hz, 11 - 5.5 A, 100 W, 840 W
| Date | Price |
|---|---|
| 9 March 2026 | £130.57 |
| 9 March 2026 | £130.57 |
| 14 March 2026 | £135.99 |
| 2 April 2026 | £135.99 |
| 3 April 2026 | £135.99 |
| 6 April 2026 | £135.99 |
| 8 April 2026 | £135.22 |
| 10 April 2026 | £135.99 |
| 11 April 2026 | £113.99 |
| 23 April 2026 | £113.99 |
| 28 April 2026 | £107.99 |
| 5 May 2026 | £107.99 |
| 7 May 2026 | £107.99 |
| 1 June 2026 | £107.99 |
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Product Information
CORE GX ATX 3.1
The updated Seasonic CORE GX ATX 3.1 Series complies with the latest ATX 3.1 and PCIe 5.1 standards and includes four output ranges from 1000 W to 650 W in both black and white colors. Catering to a broad spectrum of PC enthusiasts and system builders, these power supplies provide a fine balance between cost and performance. The 80 PLUS® Gold certified Seasonic’s Core GX line is a fully modular design equipped with black cables featuring a braided pattern. These power supplies are solid performers for a large range of applications, where a 120 mm Hydro Dynamic Bearing fan is combined with Seasonic’s Smart and Silent Fan Control to ensure the optimal cooling performance at the lowest possible noise level. These quality power supplies are backed up by Sea Sonic’s 7-year worldwide manufacturer’s warranty.
New Seasonic OptiSink Design
The overall quality and reliability of the new CORE GX ATX 3.1 Series has been greatly improved by a brand-new PCB (Printed Circuit Board) layout and the implementation of automated surface mount technology during production, which minimizes human production errors.
By using a redesigned PCB combined with smaller MOSFET and heat sink components, the internal space within the power supply was increased to enhance heat dissipation and airflow to result in better component cooling.
The eightfold increase in heat dissipation keeps the internals of the power supply cooler, eventually leading to improved product quality, long-term reliability, and more efficient operation.
The redesigned layout of the power supply components and its improved thermal performance creates versatility and allows the power supply to be safely installed in any orientation.
The OptiSink design is an eco-friendly solution that not only lowers the costs of material usage and production but also leads to energy savings in the long run.
Next-Gen and Legacy GPU Cable
Includes native 12V-2x6 and 2× 8-pin adapter for maximum compatibility
S2FC - Smart And Silent Fan Control
The intelligent thermal circuit feature is designed to find the optimal balance between the necessity to cool the components and the need to run the power supply in the most silent manner possible.
Product
- Name
- Seasonic CORE GC-850 ATX 3.1 power supply unit 850 W 24-pin ATX Black
- Category
- Power Supply Units
- Brand
- Seasonic
Power
- Total power
- 850 W
- AC input voltage
- 100 - 240 V
- AC input frequency
- 50/60 Hz
- Input current
- 11 - 5.5 A
- 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
- Power protection features
- Over current, Over power, Under voltage, Over total voltage, Over voltage, Short circuit
Operational conditions
- Operating temperature (T-T)
- 0 - 50 °C
Weight & dimensions
- Width
- 150 mm
- Depth
- 140 mm
- Height
- 86 mm
Ports & interfaces
- Motherboard power connector
- 24-pin ATX
- Peripheral (Molex) power connectors (4-pin)
- 2
- Motherboard power cable length
- 61 cm
- Number of SATA power connectors
- 2
- Number of PATA power connectors
- 2
- Cabling type
- Fully-Modular
Packaging data
- Package type
- Box
Performance
- Purpose
- PC
- Power supply unit (PSU) form factor
- ATX
- 80 PLUS certification
- 80 PLUS Gold
- ATX version
- 3.1
- Mean time between failures (MTBF)
- 100000 h
Design
- Product colour
- Black
- Cooling type
- Active
- Fan diameter
- 12 cm
- Number of fans
- 1 fan(s)
- On/off switch
- Yes
Technical details
- Sustainability certificates
- ENERGY STAR
Packaging content
- Cables included
- AC, Peripheral (Molex) to SATA 3.3, CPU, PCIe, SATA
Certificates
- Compliance certificates
- BSMI, CB, CCC, CE, EAC, REACH, RoHS, UKCA, WEEE, cTUVus
- Certification
- OCP, OPP, OTP, SCP, OVP, UVP, BSMI, C-tick, CB, CCC, CE, cTUVus, EAC, FCC, TUV, UKCA, ErP Lot 6, Energy Star, REACH, RoHS, WEEE
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