Building a mini-ITX system in 2026 requires a reliable and efficient power supply that fits within the compact chassis. Choosing the right PSU ensures system stability, energy efficiency, and future-proofing. In this guide, we explore the best compact PSUs available for mini-ITX builds in 2026.

Factors to Consider When Choosing a Compact PSU

  • Form Factor: Ensure compatibility with mini-ITX cases, typically SFX or SFX-L.
  • Wattage: Select a PSU with sufficient power for your components, generally 450W to 650W.
  • Efficiency: Look for 80 Plus Gold or higher certifications for better energy efficiency.
  • Connectivity: Check for enough PCIe and SATA power cables for your GPU and storage devices.
  • Modularity: Modular or semi-modular PSUs help with cable management in tight spaces.

Top Compact PSUs in 2026

1. SilverStone SX650-G

The SilverStone SX650-G is a 650W SFX-L power supply that offers high efficiency and reliable performance. Its fully modular design simplifies cable management, making it ideal for compact builds. With an 80 Plus Gold rating, it ensures energy-efficient operation and low noise levels.

2. Corsair SF750 Elite

The Corsair SF750 Elite provides 750W of power in a small form factor. It features a fully modular design, high efficiency (80 Plus Platinum), and excellent build quality. Its compact size makes it suitable for high-performance mini-ITX systems requiring extra power.

3. ASUS ROG Strix SFX-L 650W

The ASUS ROG Strix SFX-L 650W combines compactness with gaming-grade performance. It offers a high 80 Plus Gold efficiency, semi-modular cables, and reliable operation, making it a popular choice among gamers and enthusiasts building mini-ITX PCs.

Additional Tips for Mini-ITX PSU Selection

  • Always check the dimensions of the PSU to ensure it fits your case.
  • Consider future upgrades; choosing a slightly higher wattage can provide more flexibility.
  • Opt for PSUs with good reviews and proven reliability to avoid potential issues.
  • Ensure the PSU has all necessary cables for your components, especially for high-end GPUs.

By selecting a compact PSU that meets these criteria, you can build a powerful, efficient, and space-saving mini-ITX system in 2026. Prioritize quality and compatibility to ensure your build remains reliable and future-proof.