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Rectangular black ATX power supply with modular cable sockets and a 120mm fan grille

segotep

segotep 850W ATX 3.1 PCIe 5.1 80 Plus Gold Full Modular power supply

SKU CH-A123-BE3R6

Delivers 850W via ATX 3.1 and PCIe 5.1 with 80 Plus Gold efficiency, a native 12VHPWR cable for 600W GPU power, and fully modular cabling

  • TypeATX 3.1 Compatible
  • Main Connector20+4 Pin

Options 850W

  • Meets ATX 3.1 and PCIe 5.1 standards for 200% total and 300% GPU power excursions
  • 80 Plus Gold certified at 91.8% typical efficiency reducing system heat
  • Fully modular cables let you connect only what you need for better airflow
  • Native 12VHPWR cable delivers up to 600W to PCIe 5.1 graphics cards
  • Includes two PCIe 4.0 and one PCIe 5.1 connector for RTX 4080 and 4070 Ti support

850W ATX 3.1 PSU for modern GPUs

This 850W power supply meets ATX 3.1 and PCIe 5.1 specifications, delivering up to 200% total power excursion and 300% GPU power excursion. It targets builders assembling systems around current-generation graphics cards who need a fully modular, 80 Plus Gold certified unit.

Check 12VHPWR clearance and cable routing

Verify that your case provides enough room for the native 12VHPWR connector and its bend radius near the graphics card. Confirm the motherboard uses a standard 20+4 pin main power socket and that you have space to route only the modular cables your build requires.

Native 600W PCIe 5.1 port frees cable count

The single PCIe 5.1 port supplies up to 600W directly to compatible cards such as the RTX 4080 or 4070 Ti, while two PCIe 4.0 ports handle RTX 20/30 series and AMD GPUs. A 120mm FDB fan and DC-DC topology with LLC resonance keep noise low, letting you omit unused cables for cleaner airflow.

Highlights

  • Meets ATX 3.1 and PCIe 5.1 standards for 200% total and 300% GPU power excursions
  • 80 Plus Gold certified at 91.8% typical efficiency reducing system heat
  • Fully modular cables let you connect only what you need for better airflow
  • Native 12VHPWR cable delivers up to 600W to PCIe 5.1 graphics cards
  • Includes two PCIe 4.0 and one PCIe 5.1 connector for RTX 4080 and 4070 Ti support

Specifications

TypeATX 3.1 Compatible
Main Connector20+4 Pin

Other versions of this model

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Questions about this item

What cables are included and what must I purchase separately?

The fully modular unit ships with a 20+4 pin main connector, two PCIe 4.0 cables for RTX 20/30 series and AMD cards, and one native 12VHPWR cable for PCIe 5.1 graphics cards such as the 4080 or 4070. No extra cables are required for a standard build.

Which PCIe connector version matches my graphics card?

Use the single PCIe 5.1 port with the 12VHPWR cable for RTX 40 series cards like the 4080 or 4070; use the two PCIe 4.0 ports for RTX 20/30 series or AMD GPUs.

What does the 850W rating mean when the system spikes?

The ATX 3.1 design handles 200% total power excursion and 300% GPU power excursion, so the 850W unit can absorb short spikes well above its nominal rating without shutting down.

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