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As the demand for ultra-quiet and energy-efficient computers grows, fanless power supply units (PSUs) are becoming increasingly popular among enthusiasts and professionals building silent PCs. For 2026, several innovative fanless PSUs stand out for their reliability, efficiency, and design. Here are the top 8 fanless PSUs to consider for your silent PC build.
1. Seasonic Prime Fanless 600W
The Seasonic Prime Fanless 600W is renowned for its high efficiency and durable build quality. It features a fully modular design and uses high-quality components to ensure stable power delivery without the need for a fan. Its compact size makes it ideal for small form factor cases.
2. SilverStone Nightjar NJ600
The SilverStone Nightjar NJ600 is a compact, fanless power supply offering 600W of power. Its innovative design includes a high-efficiency circuit and a heat sink that dissipates heat passively. It is perfect for silent builds where space is limited.
3. FSP Hydro PTM 850W
The FSP Hydro PTM 850W is a high-capacity, fanless PSU that combines efficiency with reliability. It features a fully modular design and uses premium components, making it suitable for high-performance silent PCs.
4. Be Quiet! Pure Power 11 FM 600W
Be Quiet! is known for its silent operation, and the Pure Power 11 FM 600W is no exception. Although it includes a fan, it operates passively at low to medium loads, providing silent power when needed most.
5. Noctua NA-SFMA1
The Noctua NA-SFMA1 is a specialized accessory that allows passive cooling for certain power supplies. When paired with compatible PSUs, it creates a completely fanless and silent power solution.
6. Corsair SF Series Fanless PSUs
Corsair offers fanless variants within its SF series, providing reliable and efficient power delivery without noise. These PSUs are ideal for high-end silent builds requiring compact form factors.
7. SilverStone Strider ST45F-PT
The SilverStone Strider ST45F-PT is a fully passive, fanless power supply designed for small form factor and silent PCs. It features high efficiency and a robust construction suitable for continuous operation.
8. ThermalTake Toughpower GF1 Fanless
The ThermalTake Toughpower GF1 Fanless series offers high efficiency and stability with a completely silent operation. Its modular design and passive cooling make it a top choice for silent PC builders in 2026.