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be quiet SFX Power 2 400W 80 Plus Bronze SFX Power Supply

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SFX Power 2, be quiet!’s upgraded high-power compact PSU, gives you more for your mini or media PC.
£67.99 (incl. VAT)
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EAN 4260052183724
Be quiet! power supplies are designed to produce as little noise as possible during operation, fantastic build quality, high efficiency as well as the greatest possible safety and reliability. Thanks to these design choices be quiet! has become one of the most popular brands in this segment. The System Power B9 Series is no exception in this respect. With its excellent price-to-performance, high efficiency and quality craftsmanship, these compact power supplies are directed primarily at system integrators and price conscious system builders.

The be quiet! System Power B9 at a Glance:

  • Fantastic value
  • Robust power management with DC-DC technology
  • 2x 6+2-pin connectors for multi-GPU systems
  • Quiet, temperature-regulated, quality 120 mm fan
  • Stand-by usage of less than 0,15 Watts
  • Extensive electrical protection

The be quiet! System Power B9 in Detail:

These robustly designed power supplies offer a low build depth of just 14 cm, making them compatible with older and smaller cases. A 120 mm fan that adjusts in accordance with the load. At low loads of around 20 percent, the power supply produces just 9,2 dB (A) noise so as to be virtually silent.

Thanks to the extensive use of efficient and power-saving circuitry, power consumption and heat are minimised. Standby power use amounts to just 0,15 Watts. At a load of 20, 50 and 100 percent the power supply reaches a power effectiveness of up to 89 percent. For this the PSU was awarded with 80Plus certification.

With its 600 Watt rating, this power supply is on the more powerful end of the B9 series line up. In addition to powerful 3,3 V- and 5 V rails which, thanks to DC-DC technology are extremely stable. However what really impresses here are the two 28- and 22 A lines that - together - are capable of producing 576 Watts. Multicore CPUs, GPUs or RAID arrays will be supplied with all the power they could need.

The role of supplying this power falls to the extensive range of connectors. To this end, the power supply comes with a 20+4-pin- and a 4+4-pin ATX motherboard connector. Graphics card are supplied power via two 6+2-pin connectors. Six SATA- and two Molex connectors will keep even a large number of peripherals supplied with more than enough power. All cables are sleeved and securely fastened to the power supply.

Also worthy of note is the generous 3 year manufacturer's guarantee on offer as well as the availability of all necessary electrical protections e.g. over- and undervoltage protection, short circuits, overheating and overload protection.

Note: Neutral packaging with power cable - comes without additional accessories.


  • Dimensions: 150 x 86 x 140 mm (W x H x D)
  • Fan: 120 mm
  • Efficiency: 89 % incl. 80Plus certification
  • Active PFC
  • Form Factor: ATX12V / EPS12V
  • Performance: 600 W
    +3,3V: 24 A
    +5V: 15 A
    3,3V+5V: 120 W
    +12V1: 28 A
    +12V2: 22 A
    +12V (total): 576 W
    -12V: 0,3 A (3,6 W)
    +5Vsb: 3 A (15 W)
  • Connectors:
    1x 20+4-Pin (ATX12V / EPS12V)
    1x 4+4-Pin (ATX12V / EPS12V)
    2x 6+2-Pin PCIe
    6x SATA
    2x 4-Pin Molex
    Cable Length: 55 - 95 cm

Be Quiet PSU Calculator

be quiet! System Power B9 Specification:

Dimensions 150mm x 86mm x 140mm
W x H x D
Fan 120mm
Efficiency 89%
80 Plus Bronze certification
Active PFC Yes
Form Factor ATX12V / EPS12V
Performance 600W
+3,3V: 24 A
+5V: 15 A
3,3V+5V: 120 W
+12V1: 28 A
+12V2: 22 A
+12V (total): 576 W
-12V: 0,3 A (3,6 W)
+5Vsb: 3 A (15W)
Connectors 1 x 20+4-Pin (ATX12V / EPS12V)
1 x 4+4-Pin (ATX12V / EPS12V)
2 x 6+2-Pin PCIe
6 x SATA
2 x 4-Pin Molex
Cable Length: 55 - 95 cm
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£67.99 (incl. VAT)
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