Antec ATOM G850 850W 80 PLUS Gold Semi-Modular Power Supply

Delivering 70.8A on a single +12V rail, the Antec ATOM G850 850W 80 PLUS Gold Semi-Modular Power Supply is built for high-performance systems that demand stable, efficient power. With 80 PLUS Gold certification, it achieves up to 92% efficiency, reducing heat and energy costs while keeping your components cool and quiet. The semi-modular design lets you use only the cables you need, improving airflow and simplifying cable management. Equipped with a 120mm silent fan and active PFC, this PSU ensures reliable operation across a wide input voltage range. Backed by a 5-year warranty and high-quality Japanese capacitors, it's a dependable foundation for gaming rigs, workstations, and content creation builds.

Overview

The Antec ATOM G850 is an 850W ATX power supply that combines high efficiency, robust protection, and flexible cabling. Its 80 PLUS Gold rating means less wasted energy and lower operating temperatures, while the single +12V rail provides ample power for multi-GPU setups and overclocked CPUs. The semi-modular interface keeps essential cables attached and lets you add only what your build requires, reducing clutter and enhancing case airflow.

What stands out

• 80 PLUS Gold efficiency for up to 92% power conversion
• Single +12V rail with 70.8A output for demanding components
• Semi-modular cables for cleaner builds and better airflow
• 120mm silent fan with intelligent speed control
• Comprehensive protections: OVP, UVP, SCP, OPP, OTP, SIP, NLO
• High-quality Japanese capacitors for long-term reliability
• 5-year manufacturer warranty

Technical details

• Total Power: 850 W
• Form Factor: ATX
• Modularity: Semi-Modular
• Efficiency Rating: 80 PLUS Gold
• PFC Type: Active PFC
• Input Voltage: 100-240 V AC
• Input Frequency: 50-60 Hz
• Fan Size: 120 mm
• MTBF: 100,000 hours
• Connectors: 1x 24-pin ATX, 1x 4+4-pin EPS/CPU, 4x 6+2-pin PCIe, 8x SATA, 3x Molex, 1x FDD
• Protections: OVP, UVP, SCP, OPP, OTP, SIP, NLO
• Warranty: 5 Years

Our verdict

For builders seeking a high-wattage, efficient, and reliable PSU without breaking the bank, the Antec ATOM G850 is an excellent choice. Its Gold efficiency, robust single-rail design, and semi-modular flexibility make it ideal for mid-range to high-end systems. With a 5-year warranty and Japanese capacitors, it offers peace of mind for years to come.