be quiet! Pure Power 11 400W PSU ATX Black

be quiet! Pure Power 11 400W | ATX Gold Efficiency

The be quiet! Pure Power 11 400W power supply unit 20+4 pin ATX ATX Black is engineered for builders seeking a dependable foundation for quiet, efficient systems. This PSU delivers 400W of continuous power with 80 PLUS Gold certification. It targets users upgrading a PC or assembling a multi-GPU capable media system. Active PFC and DC-to-DC technology ensure stable voltage regulation.

be quiet! Pure Power 11 400W power supply unit 20+4 pin ATX ATX Black Specifications

80 PLUS Gold Certified Efficiency

This unit achieves up to 92% efficiency under typical loads. Because it is 80 PLUS Gold certified, it wastes less energy as heat. In practice, this lowers power consumption and reduces electricity costs over time. The Active PFC (0.99 power factor) further optimises usage for UK mains voltage.

Silent 120mm Fan Cooling

Cooling is handled by a silence-optimized 120mm be quiet! fan. The fan blades are airflow-optimized to reduce turbulence. Consequently, the unit operates at just 10.5 dB in silent mode. This makes it an excellent choice for noise-sensitive environments like home offices or recording studios.

Stable DC-to-DC Technology

The PSU uses DC-to-DC conversion for tight voltage regulation. This is critical when cross-loading heavy components like modern CPUs and GPUs. It also features Active Clamp and Synchronous Rectifier technologies. These provide consistent power delivery and protect sensitive hardware.

Multi-GPU Ready Connectivity

Pure Power 11 400W supports multi-GPU setups with two PCI Express 6+2 pin connectors. It provides two independent 12V rails for signal stability. With 5 SATA and 2 PATA connectors, you have ample options for drives and peripherals. The 20+4 pin ATX motherboard connector ensures broad compatibility.

What is in the box

• be quiet! Pure Power 11 400W PSU
• Motherboard power cable (45 cm)
• SATA power cables (450, 600, 750 mm)
• PCI Express power cables (50 cm)
• CPU power cable (6 cm)
• Cable ties
• Mounting screws
• User manual

Check before you buy

• Confirm your case supports standard ATX PSU dimensions (150 x 150 x 86 mm).
• Verify your motherboard has a 20+4 pin ATX connector and a 4+4 pin CPU connector.
• Check physical clearance for the non-modular cables in your specific chassis.
• Ensure your region uses the correct AC plug type; the unit accepts 100-240V input.

Questions and answers

Q: Is this PSU suitable for a silent PC build?

A: Yes, it features a silence-optimized 120mm fan with a noise level as low as 10.5 dB.

Q: Does it support modern graphics cards?

A: It includes two 6+2 pin PCI Express connectors for multi-GPU support and modern GPUs.

Q: What protection features are included?

A: It has Over Current, Over Power, Over Voltage, Overheating, Short Circuit, and Under Voltage protection.

Q: Is the cabling modular?

A: No, this is a non-modular PSU; all cables are attached to the unit.

Summary & warranty

This PSU is ideal for users building a quiet, efficient PC who do not require modular cabling. It suits system integrators and upgraders needing reliable 400W power with Gold efficiency. It is covered by the applicable manufacturer warranty.