850W STRAIGHT POWER 12 PSU

be quiet! BN337 | 850W ATX 3.1 Platinum PSU

The be quiet! BN337 delivers 850W of continuous power with 80 PLUS Platinum efficiency, making it a reliable choice for high-performance gaming and workstation PCs. Designed for ATX 3.1 compatibility, it supports next-gen GPUs and processors with stable, clean power delivery.

Key Specs

Future-Proof ATX 3.1 Design

Built to the latest ATX 3.1 standard, the BN337 ensures full compatibility with next-generation components. It features native 12V-2×6 connectors for PCIe 5.1 graphics cards while retaining four 6+2-pin PCIe connectors for current GPUs. This versatility makes it ideal for both today’s high-end systems and tomorrow’s upgrades.

Near-Silent Operation

The 135mm Silent Wings fan with fluid-dynamic bearing delivers exceptional airflow while maintaining virtually inaudible operation. With a noise level of just 22.1 dB and fan speeds ranging from 0-2100 RPM, it provides efficient cooling without the distraction of fan noise during light loads.

Premium Component Quality

Japanese 105°C capacitors throughout ensure long-term stability and reliability. The full-bridge LLC topology delivers clean, stable power with minimal ripple noise, while comprehensive protection features guard against over-current, over-voltage, short circuits, and overheating.

Modular Cable Management

Fully modular cabling eliminates clutter and improves airflow within your case. With cables up to 100cm in length, installation is straightforward even in larger chassis. The included cable ties help maintain a tidy build.

Box Contents

• be quiet! BN337 power supply unit
• CPU power cable
• SATA power cables
• Modular cables
• Cable ties
• User manual

Check before you buy

• Confirm your case has sufficient space (150 x 160 x 86 mm)
• Verify your GPU requires no more than 850W total system power
• Check you need the included cable types for your components
• Ensure your motherboard uses standard ATX, micro-ATX, or Mini-ATX form factors

Frequently Asked Questions

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

A: Yes, it features native 12V-2×6 connectors for PCIe 5.1 cards and supports current PCIe 5.0 GPUs.

Q: What efficiency rating does the BN337 achieve?

A: It’s 80 PLUS Platinum certified with up to 92.3% efficiency under typical loads.

Q: How many SATA devices can I connect?

A: The PSU includes nine SATA power connectors for multiple storage drives and peripherals.

Q: What’s the warranty period?

A: The BN337 comes with a 10-year manufacturer warranty covering defects.

Q: Is the fan always running?

A: No, the fan features zero-RPM mode at low loads for completely silent operation.

The Consultant’s verdict & warranty

The be quiet! BN337 represents excellent value for users building high-performance systems who prioritise quiet operation and future compatibility. Its ATX 3.1 compliance, premium components, and 10-year warranty make it a sound long-term investment. Covered by the standard Manufacturer Warranty.