The Antec MEGA 850W 80 PLUS Gold is a high-performance, fully modular power supply engineered for modern high-end gaming rigs and professional workstations. Featuring native ATX 3.1 and PCIe 5.1 compliance (including a 12V-2×6 GPU cable), it delivers stable, efficient power delivery backed by 80 PLUS Gold certification and a server-class PhaseWave design.
Technical Specifications
- Model Number: MEGA850
- Maximum Continuous Power: 850W
- Form Factor: ATX
- Standard Compliance: ATX 3.1 and PCIe 5.1
- Efficiency Certification: 80 PLUS Gold
- PFC: Active PFC
- Input Voltage: 100V-240V AC
- Input Frequency Range: 50Hz-60Hz
- Input Current: 12A-6A
- Modularity: Fully Modular
- Fan Type: 120mm Hydraulic Bearing (HDB) Silent Fan
- Protection Circuitry: OCP, OVP, UVP, SCP, OPP, OTP, SIP, and NLO (CircuitShield)
- Dimensions: 150mm (W) x 140mm (L) x 86mm (H)
Cable Connectors
- 1 x 24-Pin Main Power (20+4 Pin)
- 1 x 16-Pin PCIe 5.1 / 12V-2×6 GPU Cable
- 2 x 8-Pin CPU (4+4 Pin EPS)
- 3 x 8-Pin PCIe (6+2 Pin)
- 7 x SATA
- 2 x Molex
Key Features
- ATX 3.1 & PCIe 5.1 Ready: Formally certified to handle severe dynamic power excursions and natively power modern next-generation graphics cards using the robust 12V-2×6 connection.
- PhaseWave Topology: Incorporates a server-class LLC design with synchronous rectification based on a DC-DC structure, yielding up to 92% efficiency and exceptional voltage stability.
- Compact Footprint: Built at a space-saving depth of 140mm, ensuring wide compatibility with a diverse range of mid-tower and compact PC chassis.
- Industrial-Grade Protection: Equipped with CircuitShield technology including Over-Current, Over-Voltage, Under-Voltage, Short-Circuit, Over-Power, Over-Temperature, Surge & Inrush, and No-Load protections.







