The Antec GSK1200 AU is a high-performance, full-modular 1200W power supply unit (PSU) designed to meet the demanding requirements of modern gaming and enthusiast PC builds. Compliant with the latest ATX 12V 3.1 standard, it supports PCIe 5.1 with dedicated 12V-2x6 GPU connectors, ensuring seamless compatibility with the newest graphics cards without the need for adapters.

This PSU delivers superior efficiency with its 80 PLUS Gold certification and utilizes high-quality Japanese capacitors for excellent voltage regulation and minimal ripple, assuring stable and reliable power delivery. The innovative PhaseWave design incorporates server-class LLC with synchronous rectification and DC-DC topology for enhanced power efficiency and stable operation.

For cooling, the GSK1200 AU features a quiet 120 mm fluid dynamic bearing (FDB) fan equipped with Zero RPM Manager technology which keeps the fan off during low loads to reduce noise, spinning only when needed.

Safety is paramount, and Antec's CircuitShield suite offers comprehensive protection including Over Current, Over Voltage, Under Voltage, Short Circuit, Over Power, Over Temperature, Surge, and No Load protections.

The PSU's compact dimensions make it versatile for many case sizes while full modularity enables a clean build with optimal airflow by allowing users to connect only the necessary cables.

Connectivity is extensive and future-proof, including one 24(20+4) pin motherboard connector, multiple CPU and PCI-E connectors tailored for modern systems (including 2 x 16(12+4) pin PCIe 5.1 GPU cables), nine SATA, and four Molex connectors.

Supporting a global input voltage range of 100–240 V and backed by a 10-year warranty, the Antec GSK1200 AU is engineered to provide safe, efficient, and quiet power delivery for high-end PC systems.