Thermaltake Toughpower SFX 850W 80+ Gold Full Modular Power Supply

Overview

The Thermaltake PS-STP-0850FNFAGU-1 is an 850 watt SFX power supply designed to deliver reliable and efficient power in a compact form factor. It meets Intel ATX 3.0 standards and supports PCIe 5.0 graphics cards with a native 12+4 pin 12VHPWR connector capable of delivering up to 450 watts directly to the GPU. This power supply is ideal for builders who want a high-performance unit that fits into small cases without sacrificing power or future-proofing.

Key features

• Compliance with Intel ATX 3.0 specification ensures compatibility with the latest PC hardware standards.
• Native 12VHPWR cable supports PCIe 5.0 graphics cards, allowing direct connection without adapters for up to 450 watts.
• Fully modular design lets you connect only the cables you need, reducing clutter and improving airflow inside the case.
• Flat cable design maintains a low profile to keep internal airflow unobstructed and improve cooling efficiency.
• Smart Zero Fan technology stops the fan during light workloads, keeping noise levels below 29.8 decibels for quiet operation.
• Durable 100 percent Japanese capacitors rated for 105°C provide long-term stability and reliability under heavy loads.
• Includes an SFX to ATX adapter bracket, allowing flexible installation in both Mini ITX and mid-tower cases as your build evolves.

Key specs

• Power output: 850 watts
• Efficiency rating: 80 PLUS Gold
• Fan size and type: 92 mm Fluid Dynamic Bearing fan
• Noise level: under 29.8 dB with Smart Zero Fan technology
• Connector: native 12+4 pin 12VHPWR for PCIe 5.0 graphics cards
• Capacitors: 100% Japanese, rated for 105°C
• Form factor: SFX with included ATX adapter bracket

Connectivity and compatibility

This power supply is designed to work seamlessly with the latest generation of graphics cards thanks to its native 12VHPWR connector, which supports PCIe 5.0 standards. The fully modular cable system allows you to customize your setup by attaching only the cables required for your components, reducing clutter and improving airflow. The included SFX to ATX adapter bracket expands compatibility, making it easy to install in a variety of case sizes from compact Mini ITX builds to larger mid-tower systems.

Performance and reliability

With an 80 PLUS Gold efficiency rating, this power supply minimizes wasted energy and heat generation, contributing to a more stable and efficient system. The use of high-quality Japanese capacitors rated for 105°C ensures durability and consistent performance even during extended gaming sessions or demanding workstation tasks. The 92 mm Fluid Dynamic Bearing fan operates quietly and efficiently, while Smart Zero Fan technology halts fan operation during low loads to maintain a silent environment.

Ideal uses and environments

This power supply is well suited to PC builders who require a compact unit without compromising on power or future compatibility. It fits perfectly in small form factor cases used for gaming, content creation, or professional workstations. Its support for PCIe 5.0 graphics cards and modular design make it a strong choice for users planning to upgrade their GPU or who want a clean, efficient build with quiet operation.