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Black rectangular ATX power supply with 135mm fan and modular cable sockets

be quiet!

be quiet! Straight Power 12 1500W ATX 3.0 power supply BN518

SKU CH-1JEK-ABB97 MPN BN518

Fully modular ATX 3.0 unit delivers 1500 W with 80 PLUS Platinum efficiency and a virtually inaudible 135 mm fan

  • Max wattage1500 W
  • Modular cablingFull Modular
  • Fan configuration1 × 135 mm
  • Power factor correctionActive
  • Main power connector20+4Pin
  • PCIe power connectors4x 6+2 pin
  • 80 PLUS Platinum efficiency up to 93.9% reduces energy waste
  • ATX 3.0 design with PCIe 5.0 support powers modern graphics cards
  • Single 12 V rail delivers 1500 W continuous power for heavy loads
  • Silent Wings 135 mm fan runs virtually inaudible during operation
  • Japanese 105 °C capacitors provide long-term stability and reliability

ATX 3.0 1500W platinum power supply

The be quiet! Straight Power 12 BN518 is a fully modular ATX 3.0 power supply rated at 1500 W. It carries 80 PLUS Platinum certification with up to 93.9 % efficiency. A single 12 V rail delivers the full output for high-end desktop systems. Japanese 105 °C capacitors and full bridge LLC topology provide stable power delivery.

PCIe 5.0 and 6+2 pin connector limits

The unit includes four PCIe 6+2 pin connectors for graphics cards. ATX 3.0 compliance allows the PSU to handle massive power excursions up to double its rated power for short periods. The 135 mm Silent Wings fan with funnel-shaped opening maintains high airflow at very low noise levels. Active PFC and full protection circuits guard against over voltage and overload conditions.

Single 12V rail with 1500 W continuous power

One massive 12 V rail supplies the entire 1500 W without multi-rail restrictions. This makes the PSU suitable for configurations that draw extreme transient loads from a single GPU. The 160 mm depth fits standard ATX cases. Nine SATA power connectors and a 20+4 pin main connector complete the cable set.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $230.99
Pricier than about 69% of the 10,869 comparable items (median $142.99).
Max wattage 1500 W
Higher than about 92% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand namebe quiet!
Product lineStraight Power
Model name1500 w
Product colorBlack
Product typeATX 3.0 Compatible
Ports & slots
PCIe power connectors4x 6+2 pin
SATA power connectors9
Power
Max wattage1500 W
Modular cablingFull Modular
Power factor correctionActive
Main power connector20+4Pin
Efficiency certification80 PLUS PLATINUM Certified
Overvoltage protectionYes
Overload protectionYes
+3.3V max. current25A
+5V max. current25A
+12V1 max. current100
-12V max. current.3
+5VSB max. current3
Size & build
Product dimensions160 × 150 × 86 mm
Product weight3.47kg
Top fans size135 mm
Shipping weight4.26 kg
Package size328 × 248 × 108 mm
Compatibility
PSU length limit160 mm
In the box
Fans total quantity1
More details
Fan configuration1 × 135 mm
Fan LEDNo

Questions about this item

Should I choose this 1500W Platinum model or a lower-wattage unit?

Pick the 1500W unit only if your build can draw near that level; the single 12V rail delivers the full 1500W continuously and the Platinum rating keeps efficiency up to 93.9% at typical loads.

What does the 1500W rating mean once the PSU is installed in my PC?

It means the unit can supply 1500W continuously on one massive 12V rail, with Japanese 105°C capacitors and full bridge LLC topology keeping voltage stable during heavy GPU and CPU loads.

How does the ATX 3.0 interface affect what I can connect?

The ATX 3.0 design includes native 12VHPWR support for PCIe 5.0 graphics cards while still providing four 6+2 pin PCIe connectors and nine SATA connectors for drives and peripherals.

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