be quiet! TFX Power 3 300W Gold PSU

be quiet! TFX Power 3 300W Gold | Compact Silent PSU for Small Builds

The be quiet! TFX Power 3 300W Gold power supply unit 20+4 pin ATX Black delivers reliable, efficient power in a compact TFX form factor. Designed for mini and media PCs, it combines silent operation with robust protection features, making it ideal for space-constrained builds that demand stable performance.

Slim Specs Table

Ultra-Quiet Operation for Small Form Factor PCs

The TFX Power 3 300W Gold features a single 80 mm fan with rifle bearing technology, delivering near-silent cooling at just 21.7 dB. Its fan speed adjusts between 0 and 1323 RPM based on thermal load, ensuring quiet operation during light use and effective cooling under load. This makes it perfect for HTPCs and small office PCs where noise reduction is essential.

Gold Efficiency Meets Compact Design

With 80 PLUS Gold certification, this PSU achieves up to 90.6% efficiency, reducing heat output and energy waste. Its compact TFX dimensions (85 x 175 x 65 mm) allow installation in tight cases where standard ATX units won’t fit. Despite its small size, it provides sufficient power for low-to-mid-range systems, including those with a PCIe graphics card.

Comprehensive Protection for Reliable Performance

Built-in safety features include over current, over power, over voltage, short circuit, surge & inrush protection, and under voltage protection. The 29 ms hold time ensures stable power delivery during brief interruptions. These protections safeguard your components, making this PSU a dependable choice for mission-critical small form factor systems.

Flexible Connectivity for Modern Components

The PSU includes a 20+4 pin ATX motherboard connector, a 4-pin CPU connector, one 6+2 pin PCIe connector, three SATA power connectors, two 4-pin Molex connectors, and a floppy drive connector. All cables are non-modular and fixed at lengths suited for TFX builds, ensuring reliable connections without excess cable clutter.

Box Contents

• be quiet! TFX Power 3 300W Gold PSU
• Mounting screws
• Cable ties
• User manual (English, German, Spanish, French, Polish, Russian)

Check before you buy

• Confirm your case supports TFX power supply dimensions (85 x 175 x 65 mm)
• Verify your system’s total power draw stays under 300W
• Check if your graphics card requires additional PCIe power connectors
• Ensure your build includes adequate ventilation for optimal cooling

Frequently Asked Questions

Q: What are the dimensions of this PSU?

A: The TFX Power 3 300W Gold measures 85 mm wide, 175 mm deep, and 65 mm high.

Q: Does this PSU support a PCIe graphics card?

A: Yes, it includes one 6+2 pin PCIe power connector suitable for low-to-mid-range graphics cards.

Q: What efficiency rating does this PSU have?

A: It has 80 PLUS Gold certification with up to 90.6% efficiency under typical loads.

Q: What protection features are included?

A: It includes over current, over power, over voltage, short circuit, surge & inrush protection, and under voltage protection.

Q: What is the noise level of this PSU?

A: The noise level is 21.7 dB, making it suitable for quiet computing environments.

The Consultant’s Verdict & Warranty

The be quiet! TFX Power 3 300W Gold power supply unit 20+4 pin ATX Black is an excellent choice for compact PC builds requiring reliable, efficient, and quiet power delivery. Its TFX form factor, Gold efficiency, and comprehensive protection make it ideal for mini-ITX systems, HTPCs, and small office PCs. Covered by the standard Manufacturer Warranty.