Description

Antec GSK 850W Power Supply – ATX 3.1, 80 PLUS Gold, Fully Modular, PCIe 5.1 Ready

Overview

The Antec GSK 850W ATX 3.1 Power Supply Unit (PSU) is engineered for high-end gaming PCs, workstations, and next-generation hardware. Designed to meet the latest Intel ATX 3.1 specifications, this power supply is PCIe 5.1 ready, offering native support for the newest GPUs including the NVIDIA RTX 40 series. Certified with 80 PLUS Gold efficiency, it delivers up to 92% energy efficiency, ensuring lower power consumption, reduced heat output, and longer component lifespan. Its fully modular cable system enables clean cable management, improved airflow, and a more organized build. Built with premium-grade Japanese capacitors and comprehensive electrical protection, the Antec GSK 850W is built to perform under pressure.

Key Features

Power & Performance

• Rated Power Output: 850W continuous stable power
• Efficiency: 80 PLUS Gold certified – up to 92% efficiency
• ATX Standard: Compliant with Intel ATX 3.1 specification
• PCIe 5.1 Ready: Equipped with native 12VHPWR connector for next-gen graphics cards
• Supports Intel and AMD high-end CPUs and GPUs

Thermal & Acoustic Performance

• Cooling Fan: 120mm Fluid Dynamic Bearing (FDB) fan for quiet and efficient operation
• Zero RPM Fan Mode: Passive cooling at low to medium loads for near-silent performance
• Optimized airflow design for better heat dissipation

Design & Cable Management

• Fully Modular Design: Use only the cables you need for improved airflow and aesthetics
• Flat black cables reduce clutter and improve airflow inside the chassis
• Compact ATX form factor fits most mid- and full-tower cases

Premium Components & Protection

• High-quality Japanese capacitors ensure long-term durability and voltage stability
• PhaseWave™ LLC Resonant Converter design with DC-to-DC topology
• Antec CircuitShield™ Protection Suite:
  • OVP (Over Voltage Protection)
  • UVP (Under Voltage Protection)
  • OCP (Over Current Protection)
  • OPP (Over Power Protection)
  • SCP (Short Circuit Protection)
  • OTP (Over Temperature Protection)
  • SIP (Surge & Inrush Protection)
  • NLO (No Load Operation)

Connectors

• 1 x 24-pin ATX
• 2 x 8-pin (4+4) EPS CPU
• 4 x 8-pin (6+2) PCIe
• 1 x 16-pin (12VHPWR for PCIe 5.1 GPUs)
• 8 x SATA
• 4 x Molex

Physical Specifications

• Dimensions: 140mm (L) x 150mm (W) x 86mm (H)
• Weight: Approx. 2.62 kg
• Form Factor: Standard ATX
• Warranty: 10-Year Manufacturer Warranty

Why Choose the Antec GSK 850W ATX 3.1 PSU?

• Next-gen ready with PCIe 5.1 and ATX 3.1 compliance
• High-efficiency 80 PLUS Gold certification ensures reduced power waste
• Silent and efficient cooling with advanced fan control and FDB technology
• Fully modular cable system for clean, custom PC builds
• Built with premium Japanese components and advanced protection circuitry