be quiet! PURE POWER 12 850W ATX Black PSU

be quiet! PURE POWER 12 850W | ATX 3.1 Gold Efficiency

The be quiet! PURE POWER 12 850W power supply unit 20+4 pin ATX ATX Black delivers reliable power for modern PC builds. It targets system builders who need stable performance and quiet operation. This unit is ATX 3.1 compliant and PCIe 5.1 compatible. It offers a solid foundation for high-end components with consistent efficiency.

Slim Specifications

ATX 3.1 and PCIe 5.1 Compliance

This PSU meets the latest ATX 3.1 and PCIe 5.1 standards. It handles power excursions common with modern graphics cards. Because it includes a dedicated 12-pin PCIe cable, it supports next-gen GPUs directly. Also, it has traditional 6+2 pin connectors for broader compatibility. So, your build stays future-proof.

Quiet 120mm Fan Operation

It uses a single 120mm fan with Rifle bearing technology. This design minimises noise while maintaining active cooling. The noise level is rated at just 25.1 dB(A). Therefore, your system remains discreet even under load. The fan curve is optimised for low RPMs at typical loads.

High Efficiency and Stable Power

The unit achieves 80 PLUS Gold certification with 90.5% efficiency. This reduces wasted energy and heat output. An active Power Factor Correction (PFC) circuit ensures clean power draw. The single +12V rail provides 70.9 A, delivering stable power to CPUs and GPUs. This simplifies cable management and power distribution.

Comprehensive Protection Features

It includes multiple protection circuits for system safety. These cover over current, over power, over voltage, and overheating. It also has short circuit, surge & inrush, and under voltage protection. This safeguards your components against unexpected power events. The hold time is 17.34 ms, ensuring stable operation during brief interruptions.

Non-Modular Cabling with Essential Connectors

This model features a non-modular cabling design. All cables are permanently attached for cost efficiency. It provides a 20+4 pin ATX motherboard connector (55 cm). Also included are three 6+2 pin PCIe and one 12-pin PCIe connector. SATA and Molex cables offer flexible storage peripheral connections.

Box contents

• be quiet! PURE POWER 12 850W PSU
• AC power cable
• Cable ties
• Mounting screws

Check before you buy

• Confirm your case supports ATX PSU form factor (160 x 86 x 150 mm).
• Verify you have space for the attached cable lengths in your build.
• Check your motherboard requires a 20+4 pin ATX connector.
• Ensure your GPU is compatible with the provided PCIe 6+2 pin or 12-pin cables.

Frequently Asked Questions

Q: Is this PSU suitable for UK mains voltage?

A: Yes, it supports 100-240V AC input, so it works with UK 230V power.

Q: Does it include a UK plug power cable?

A: The input states “Cables included: AC”, but the plug type is not specified. Confirm with the seller.

Q: Is the 12-pin PCIe connector for NVIDIA 40-series?

A: It includes a 12-pin PCIe connector, but verify pin layout matches your specific GPU requirement.

Q: What is the physical size of this unit?

A: It measures 160 mm depth x 86 mm width x 150 mm height.

Q: How long is the warranty?

A: The warranty period is 10 years, as stated by the manufacturer.

The Consultant’s verdict & warranty

This PSU is ideal for builders needing a reliable, quiet 850W unit with modern standards. It suits those upgrading to ATX 3.1 systems or using high-end GPUs. The 10-year warranty provides long-term peace of mind. Covered by the standard Manufacturer Warranty.