be quiet! PURE POWER 12 M 1200W PSU

be quiet! PURE POWER 12 M | 1200W ATX 3.1 Gold PSU

The be quiet! PURE POWER 12 M 1200W delivers exceptional quiet performance with ATX 3.1 compliance and PCIe 5.1 compatibility. This fully-modular power supply unit is engineered for high-end gaming PCs and workstations demanding reliable, efficient power delivery for the latest graphics cards and components.

Key Specifications

ATX 3.1 Ready for Next-Gen Components

This PSU meets the latest ATX 3.1 specification, providing stable power delivery for modern hardware demands. The PCIe 5.1 compatibility ensures your system can handle the most power-hungry graphics cards currently available and those coming in the near future. With both a dedicated PCIe 5.1 cable and four PCIe 6+2 cables included, you’ll have the flexibility needed for multi-GPU setups or single high-end cards.

Whisper-Quiet Operation with Smart Cooling

The 120mm rifle bearing fan operates between 0-2700 RPM and features intelligent thermal control that keeps noise levels to just 34.3 dB. In silent mode, the fan stops completely during low loads, making this PSU virtually inaudible during everyday computing tasks. The active cooling system maintains optimal temperatures without the constant fan noise common in high-wattage power supplies.

Fully Modular Design for Clean Builds

The fully-modular cabling system lets you connect only the cables you need, reducing clutter inside your case and improving airflow. Included cables cover all your needs: ATX 20+4 pin, CPU 4+4 pin, six SATA connectors, two PATA connectors, four PCIe 6+2 connectors, and an EPS 8-pin connector. Cable lengths are generous enough for most standard and larger cases, with motherboard cables at 55cm and PCIe cables at 60cm.

Comprehensive Protection and Reliability

Built with seven protection features including over current, over power, over voltage, overheating, short circuit, under power, and under voltage protection, this PSU safeguards your valuable components. The 19ms hold time ensures stable power during brief interruptions. With a Mean Time Between Failures of 100,000 hours and a power factor of 0.98, you’re investing in long-term reliability for your system.

Box Contents

• be quiet! PURE POWER 12 M 1200W PSU
• AC power cable
• CPU power cable
• PATA power cables
• PCIe power cables
• SATA power cables
• Cable ties
• User manual

Check Before You Buy

• Confirm your case has sufficient space (150mm x 160mm x 86mm)
• Verify your graphics card’s power requirements match the available PCIe connectors
• Check that your motherboard’s power needs align with the 20+4 pin ATX and 4+4 pin CPU connectors
• Ensure your power setup can handle the 100-240V input range

Frequently Asked Questions

Q: Is this PSU compatible with PCIe 5.0 graphics cards?

A: Yes, it includes both PCIe 5.1 and PCIe 6+2 cables for compatibility with current and next-generation graphics cards.

Q: Does the fan run constantly?

A: No, the fan features silent mode operation where it stops completely during low loads and only spins up when needed.

Q: How many SATA devices can I connect?

A: You can connect up to six SATA devices using the included SATA power cables.

Q: What efficiency certification does this PSU have?

A: It’s 80 PLUS Gold certified with 91.5% efficiency, reducing energy waste and heat output.

Q: Is the PSU fully modular?

A: Yes, all cables are detachable, allowing you to use only what you need for a cleaner build.

The Consultant’s Verdict & Warranty

The be quiet! PURE POWER 12 M 1200W is ideal for enthusiasts building high-performance gaming PCs or content creation workstations that require reliable, quiet power delivery. Its ATX 3.1 compliance, PCIe 5.1 compatibility, and fully-modular design make it future-proof for upcoming hardware while maintaining the exceptional quiet operation be quiet! is known for. Covered by the standard Manufacturer Warranty.