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The Number 1 for power supplies in Germany


Art.No. BN140

Better, Quieter, More Reliable Builds

It’s not easy being a system integrator in today’s competitive PC computing environment. Your customers demand—and deserve!—more, while you want the best price-for-performance available. be quiet! understands that, which is why we made the new System Power 7 300W.

Offering the best possible combination of power, quietness, features and efficiency, the System Power 7 300W gives the SI a big advantage, with worry free compatibility, maximum 12V power, and rock-solid voltages. It is 80PLUS® Bronze certified, and lets you build cost-effective systems with superior performance—a key differentiator in these days of carbon copy low price PSUs.

  • Class-leading quietness with 120mm cooling fan; annoying high-frequency noise in particular is reduced
  • 300 Watts of continuous power provide extensive power reserves for those times the PC really needs it all
  • More 12V power than other SI-class power supplies increases power stability, supports bigger system builds
  • 80PLUS Bronze certification and up to 87% power conversion efficiency for greener systems
  • Extensive compatibility with latest specifications, including Intel C6/C7, ErP 2014 and Energy Star 6.0
  • German product conception, design and quality control



Feature Details

Quiet Operation

  • Installed 120mm fan provides class-leading quietness
  • High frequency noise is reduced under all load conditions


  • Better signal stability and power efficiency than typical SI-class PSUs
  • Full suite of top safety protections defends against over-currents, over- and under-voltages, short circuits, overheating and overloads, thus safeguarding your valuable components
  • Two large +12V rails improve power signal stability

Energy Efficiency

  • 80PLUS Bronze certification
  • Very high efficiency (up to 87%) means PC draws less power from the mains to do its work
  • Saving power means your customers can save on operating expense, but it also means less waste heat, less cooling required, and overall quieter operation
  • Standby drain of less than 0.25 Watts
  • Meets Energy Star 6.0 guidelines
  • Fulfills ErP 2014 guidelines
  • Zero Load design supports Intel’s Deep Power Down C6/C7 mode


Maximum Compatibility and Convenience

  • PSU supports up to 9 connectors for large system builds
  • Connectors are compatible with older components as well as those still on the drawing board
  • P4+P4 plug supports most mainboard types
  • Clearly labelled plugs and clever accessories promote simple installation


Outstanding Service and Support

  • 3 year manufacturer's warranty
  • Quick support is available via our international hotline, Mondays to Fridays from 0900 to 1730, German local time