Power supply unit Fortron FSP MEGA-1200GM 1200 W ATX 80 PLUS Gold Fully-Modular Black 135 mm fan

The Fortron FSP MEGA-1200GM is a 1200 W ATX power supply unit designed for high-performance PCs and workstations. It delivers up to 90% efficiency with 80 PLUS Gold and Cybenetics Gold certifications, supports the Intel ATX 3.1 design guide, and offers a fully-modular cable system with a 135 mm fluid-dynamic bearing fan for active cooling. The unit integrates a powerful single +12V rail, advanced load regulation (FSP MTLC®) with ±1% stability, comprehensive protection circuitry, and a compact housing suitable for space-constrained builds.

Advantages

The MEGA-1200GM provides high conversion efficiency to reduce wasted energy and heat, helping quieter operation and lower system temperatures. Fully-modular embossed cabling simplifies installation and improves airflow by allowing use of only necessary cables. Compliance with ATX 3.1 and native PCIe 12V-2x6 support ensures compatibility with current and future high-end graphics cards. Component choices such as 105°C Japanese bulk capacitors, conformal coating for humidity resistance, and a 135 mm FDB fan contribute to reliability and long service life.

Suitable for

• High-end gaming PCs with multiple or power-hungry GPUs
• Workstations running AI, rendering, or simulation workloads
• Compact or airflow-optimized builds requiring a modular PSU
• Systems requiring ATX 3.1 compliance and PCIe 12V-2x6 connectivity

Key specifications

• Total power output: 1200 W
• Efficiency: approximately 90% at typical load
• Certification: 80 PLUS Gold / Cybenetics Gold
• Form factor compatibility: ATX (complies with Intel ATX 3.1)
• Rail configuration: single +12V rail
• Load regulation: FSP MTLC® ±1%
• Cooling: 135 mm fluid dynamic bearing (FDB) fan with eco semi-fanless mode (Zero RPM under ~40% load)
• Protection features: OCP, OVP, SCP, OPP, UVP, OTP, SIP, NLP
• Operating durability: 105°C Japanese electrolytic capacitors
• Environmental resistance: conformal coating tested for high humidity environments
• Casing dimensions: 150 x 150 x 86 mm
• Colour: Black

How to use

Install the MEGA-1200GM into a compatible ATX case and secure it using the mounting points. Connect only the required modular cables—24-pin motherboard, CPU 8-pin/4+4 as needed, and PCIe 8-pin or PCIe 12V-2x6 connectors for graphics cards—ensuring firm seating for each connector. Set the eco semi-fanless switch according to your preference for zero-RPM operation at low loads. Verify PSU connections before powering on the system and monitor initial boot for stable voltage delivery.

Usage recommendations

For optimal performance, use the fully-modular cables provided and route them to maximize case airflow. Enable the eco semi-fanless mode to reduce acoustic noise during light workloads, and ensure adequate case ventilation under sustained heavy loads. When pairing with modern high-power GPUs, prefer the native PCIe 12V-2x6 connector to maintain stable power delivery. Periodically inspect connectors and keep the PSU area free of dust to preserve cooling efficiency and component longevity.