Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White

Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White

Brand Seasonic

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£131.62

Free delivery

3 offers at 3 retailers

Listed since 7 April 2026

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Description

850 W 100 - 240 V 50/60 Hz. Motherboard power connector: 20+4 pin ATX. PC ATX 80 PLUS Gold. Active 12 cm. White. CORE GX White ATX 3.1. The updated Seasonic CORE GX White 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 White line is a fully modular design equipped with white 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 White 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.. Fully Modular Cables. In Sea Sonic’s patented design feature full modularity comes hand-in-hand with the extensive use of SMD technology to increase the overall performance and reliability of this power supply. The simple and inventive layout scheme helps to attain unsurpassed quality and performance, where efficiency is further enhanced by minimized line resistance, reduced voltage drop and lower impedance. Reduced component count and better space utilization facilitate optimal air flow inside the case and promote heat dissipation, proper cooling and ultimately longer product life.. 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.. Power. Power protection features. Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage. Max output current (+5Vsb). 3 A. Max output current (-12V). 0.3 A. Max output current (+5V). 20 A. Max output current (+12V). 70 A. Max output current (+3.3V). 20 A. Combined power (+5Vsb). 15 W. Combined power (-12V). 3.6 W. Combined power (+12V). 840 W. Combined power (+3.3V). 100 W. Input current. 11 - 5.5 A. AC input frequency. 50/60 Hz. AC input voltage. 100 - 240 V. Total power. 850 W. Ports & interfaces. Cabling type. Fully-Modular. CPU power cable length. 75 cm. CPU power connector (4+4 pin). Yes. PCI Express power connectors (12+4 pin) cable length. 700 mm. PCI Express power connectors (12+4 pin). 1. PCI Express power connectors (6+2 pin). 3. Peripheral (Molex) power cable length. 690 mm. Peripheral (Molex) power connectors (4-pin). 3. SATA power cable length. 750 mm. Number of SATA power connectors. 3. Motherboard power cable length. 61 cm. Motherboard power connector. 20+4 pin ATX. Performance. Mean time between failures (MTBF). 100000 h. Bearing technology. Hypro Bearing. ATX version. 3.1. 80 PLUS certification. 80 PLUS Gold. Power supply unit (PSU) form factor. ATX. Purpose. PC. Design. On/off switch. Yes. Fan diameter. 12 cm. Cooling type. Active. Product colour. White. Operational conditions. Operating temperature (T-T). 0 - 50 °C. Weight & dimensions. Height. 86 mm. Depth. 150 mm. Width. 140 mm. leaflet

Full specifications

Marque Seasonic
Référence fabricant srpcgx851a5a32sfw
EAN 4711173878728

Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White in 2026: still the right choice?

When it comes to Informatique, the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White by Seasonic is a reference that savvy buyers know well. Its value for money in 2026 deserves particular attention, especially given its availability across many retailers and the brand's strength in the market. Our comparison tool lets you view all available offers in real time, with or without free delivery, and click directly on the offer of your choice.

Buy the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White now or wait?

With the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White, Seasonic delivers a quality level consistent with its market positioning. This product suits both newcomers and regular users of the Informatique category. Its quick setup and reliable performance make it a recommended choice for anyone looking to invest in durable equipment without facing technical complications in the first weeks of use.

Value for money analysed in 2026

At £131.62, the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White offers value for money consistent with its positioning in the Informatique category. Seasonic maintains a consistent quality level across this range, justifying the investment at this price. Compare with other available offers on our comparison tool to ensure you get the best rate at the time of purchase. The Seasonic Nicht kategorisiert power supply unit 650 W ATX Black from the same range may also interest you for comparison.

Serious alternatives to consider

If the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White does not exactly match your expectations, the Informatique category offers other options to explore. Our comparison tool lists all available products with their prices in real time. Filter by budget, brand or availability to find the most suitable alternative for your situation. The Seasonic SRP-CGX751-A5A32SF power supply unit 750 W ATX Black is another reference from the same brand to consider.

Market price ranges in 2026

RangeIndicative price
Entry-levelUnder 384300 £
Mid-range384300 £ to 896710 £
High-endOver 896710 £

The Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White is available from several trusted retailers. Always check stock availability and delivery times before finalising your order to avoid any unpleasant surprises. On Compiral, offers showing "In stock" can be delivered quickly, often within 2 to 5 working days depending on the retailer and your delivery address.

Frequently asked questions about Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White

Is delivery free for the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White at all retailers?

Free delivery is not guaranteed for the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White at every retailer. Some include it in their price, others charge separately. On Compiral, use the free delivery filter to display only offers with free postage. The total price shown in our table always includes delivery costs for a true cost comparison.

How do I return the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White if I am not satisfied?

You have a 14-day right of withdrawal for any online purchase, applicable to the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White regardless of the retailer. Precise return conditions vary by retailer: check their returns policy before buying. Statutory consumer rights protect you in the event of a defect discovered after delivery.

Is the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White worth its price in 2026?

In 2026, the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White is listed from £131.62 at our partner retailers. This price is consistent with the positioning of Seasonic in the Informatique category. To judge whether this price is currently attractive, check the price history on our product page. Also compare the total price including delivery to avoid any surprises at checkout.

What warranty does the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White come with?

The Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White generally comes with a manufacturer warranty of 1 to 2 years depending on the retailer. In addition to the commercial warranty from Seasonic, statutory consumer rights apply to all purchases. Check the warranty conditions directly on the retailer's page before finalising your order.

Is the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White in stock?

Stock availability for the Seasonic CORE GX-850 power supply unit 850 W 20+4 pin ATX ATX White is updated in real time on Compiral. Retailers showing "In stock" can usually deliver quickly, often within 2 to 5 working days. If the product is temporarily out of stock at one retailer, check the other offers in our table. Check back regularly as stock levels change frequently in the Informatique category.

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