Overview

The ANTEC GSK850 V2 White ATX3.1 is a fully modular 850W power supply from Antec, featuring 80 PLUS Gold certification. Its white chassis and cables make it an excellent choice for white-themed builds. It supports the ATX3.1 standard with a native 12VHPWR connector for PCIe 5.0 GPUs, combining quiet operation with high efficiency.

This unit is sold on Amazon.co.jp under model GSK ATX3.1 (ASIN: B0GJZB5DQ1). Seller and shipper is Amazon.co.jp.

Key Features

  • 80 PLUS Gold certified: Up to 90% efficiency under typical load, reducing electricity costs and heat output.
  • Fully modular cables: Connect only the cables you need for clean cable management and better airflow.
  • ATX3.1 & PCIe 5.0 support: Native 12VHPWR connector delivers up to 600W to modern GPUs without adapters.
  • Quiet 120mm PWM fan: Temperature-controlled speed keeps noise low during light loads.
  • Japanese capacitors & comprehensive protection: OVP/UVP/OCP/SCP/OTP ensure long-term reliability.

Compatibility Guide

  • Form factor: Standard ATX (150 x 86 x 140mm) fits most ATX and Micro-ATX cases. The compact 140mm depth leaves room for cable management.
  • Connectors:
    • 1x ATX 24-pin
    • 2x EPS 4+4-pin (for dual CPU power on high-end motherboards)
    • 1x PCIe 5.0 12VHPWR (600W)
    • 3x PCIe 6+2-pin (for legacy GPUs)
    • 8x SATA, 4x peripheral 4-pin
  • Cable lengths: All at least 600mm, ample for full-tower cases.
  • 850W capacity: Sufficient for mid-high to high-end GPUs like RTX 4070 Super or RX 7800 XT with modern CPUs.

Ideal Builds

  • White-themed PCs: All cables and the unit itself are white, matching white components perfectly.
  • Quiet gaming rigs: The 120mm fan remains near-silent under light loads; even under load it's unobtrusive.
  • RTX 40/50 series builds: Native 12VHPWR eliminates adapter clutter.
  • Energy-efficient workstations / servers: 80 PLUS Gold reduces power waste and heat.

Upgrade Considerations

  • No performance bottleneck: A PSU does not directly affect frame rates. However, ensure your total system draw stays below 850W (e.g., avoid pairing with RTX 5090 + Core i9-14900K under full load). Consider a 1000W unit for such extreme builds.
  • Cable compatibility: Only use cables provided with this unit – mixing Antec GSK series cables with other PSUs can cause damage.
  • Longevity: Expect 5–7 years of reliable operation with proper dust management and ventilation.

Product Disclosure (Amazon)

  • Manufacturer: Antec
  • Brand: ANTEC
  • Seller: Amazon.co.jp
  • Fulfilled by: Amazon.co.jp
  • Model: GSK ATX3.1
  • ASIN: B0GJZB5DQ1
  • Note: This article covers a manufacturer-made product based on Amazon listing details.