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Seasonic Core GX-850 850W Power Supply - SRP-CGX851-A5A32SF-W

Seasonic Core GX-850 850W Power Supply - SRP-CGX851-A5A32SF-W

The Seasonic Core GX-850 is a high-efficiency 850W ATX power supply unit designed to cater to the ...

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Seasonic White Core Gx-850 Power Supply Unit 850 W 20+4 Pin Atx Atx

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12 offers from £104.29 - £143.76

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PCHUB.UKSeasonic White Core Gx-850 Power Supply Unit 850 W 20+4 Pin Atx Atx
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£104.29
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Box.co.ukSeasonic White Core Gx-850 850W Atx 80 Plus Gold Psu Power Supply
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£118.95
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Laptop OutletSeasonic White Core Gx-850 850W Atx 80 Plus Gold Psu Power Supply
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£118.95
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AWD-IT.co.ukSeasonic Gold/White Core Gx-850 850W Atx 3.1 80 Plus Power Supply - Srp-Cgx851-A5a32sf-W
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£119.52
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Scan ComputersSeasonic Core Gx Atx 850W Fully Modular 80+ Pcie 5.1 Po Size 3.1 White/Gold Core Gx 850V2 White
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£119.99
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Product Information

Full details

The Seasonic CORE GX-850 is a high-performance, 850W fully modular power supply designed for modern PC builders and gamers who prioritize both aesthetics and reliable power delivery. Featuring 80 PLUS Gold certification and full support for ATX 3.1 and PCIe 5.1 standards, this unit offers excellent efficiency and future-proofing for high-end hardware; however, users should ensure their case has sufficient clearance for the 150mm depth of the unit.

All features

Model Part NumberSRP-CGX851-A5A32SF-W
BrandSeasonic

Extended Product Information

FAQs

Is the Seasonic CORE GX-850 compatible with older motherboards?

Yes, it uses a standard 20+4 pin ATX connector which is backward compatible with virtually all standard motherboards.

Does this PSU come with the 12+4 pin cable for NVIDIA GPUs?

Yes, it includes a dedicated PCIe 5.1 cable (12+4 pin) to power modern GPUs without requiring adapters.

How long is the warranty?

The Seasonic CORE GX-850 is backed by a 7-year worldwide manufacturer warranty.

Can I use custom sleeved cables with this unit?

While it is a fully modular unit, only use the cables provided by Seasonic for this specific model to avoid pin-out mismatches that can damage your components.

Is the fan always spinning?

Yes, it uses an active cooling system with a 120mm fan that adjusts speed based on load to balance cooling and noise.

Troubleshooting

System will not power on

Verify the power switch on the back of the PSU is set to the 'I' position and ensure the wall outlet has power.

Fan is spinning loudly

Ensure the intake grill is not blocked by dust or cables and that there is adequate ventilation in the case.

System shuts down under load

Check all modular cable connections to ensure they are seated firmly and verify your total system power draw does not exceed 850W.

Pros and Cons

Pros

  • Clean white aesthetic suitable for thematic builds
  • Fully modular cabling reduces clutter
  • ATX 3.1 compliance for next-gen hardware
  • 7-year manufacturer warranty
  • Quiet operation under typical loads

Cons

  • 150mm depth may be tight in smaller mini-ITX cases
  • White cables are specialized and may not match all build palettes
  • Requires careful installation of the PCIe 12+4 pin connector

Setup, Compatibility & Care

Installation of the CORE GX-850 is straightforward thanks to its standard ATX form factor. Before installing, ensure your case supports a 150mm deep power supply.

  1. Mounting: Secure the PSU in your case using the provided screws. The unit can be mounted with the fan facing up or down depending on your case's air intake configuration.
  2. Cabling: Connect the 20+4 pin ATX cable to the motherboard and the 4+4 pin CPU cables to the top of the motherboard. Plug in your PCIe 12+4 pin cable directly into the GPU.
  3. Maintenance: To keep the unit running optimally, periodically blow out dust from the intake grill using compressed air. Ensure that no cables are obstructing the 120mm fan blades.
  4. Compatibility: This unit is compatible with all standard ATX motherboards and is designed for modern GPUs requiring the 12+4 pin connector.

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