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Product comparison · 2 power supply units

be quiet! Efficient Power F1 vs be quiet! Straight Power E9

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  • 43specifications compared
  • 14differ
  • 29identical
  • 19known for one product only

Key differences

  • Max output current (+12V)
    • 18 A
    • 32 A
  • Max output current (+5V)
    • 22 A
    • 17 A
  • Efficiency
    • 92%
    • 92.9%
  • Hold time
    • 32 ms
    • 19 ms
  • Motherboard power connector
    • 24-pin ATX
    • 20+4 pin ATX
  • Peripheral (Molex) power connectors (4-pin)
    • 3
    • 4
  • Noise level
    • 30 dB
    • 14.6 dB
  • Mean time between failures (MTBF)
    • 100000 h
    • 300000 h

Side by side

Differences highlightedShow differences only
62 specifications
A

be quiet!

Efficient Power F1View product
B

be quiet!

Straight Power E9View product
Power5 differ
Peak powerKnown for one450 W
Maximum input current (@110V)Differs+12V1,+12V2,+3.3V,+5V,+5Vsb,-12V+12V1,+12V2,+12V3,+3.3V,+5V,+5Vsb,-12V
Power factorKnown for one0.99
Max output current (+12V)Differs18 A32 A
Max output current (+12V3)Known for one18 A
Max output current (+5V)Differs22 A17 A
EfficiencyDiffers92%92.9%
Hold timeDiffers32 ms19 ms
Combined power (-12V)Known for one3.6 W
Combined power (+5Vsb)Known for one15 W
Ports & interfaces2 differ
Motherboard power connectorDiffers24-pin ATX20+4 pin ATX
Peripheral (Molex) power connectors (4-pin)Differs34
PCI Express power connectors (6-pin)Known for one1
CPU P4 connector (4-pin)Known for one1
ATX Power connector (24-pin)Known for oneYes
Performance2 differ
Noise levelDiffers30 dB14.6 dB
Bearing technologyKnown for oneFDB
Mean time between failures (MTBF)Differs100000 h300000 h
EPS versionKnown for one2.92
Design1 differ
Fan diameterDiffers12 cm13.5 cm
Fan speedKnown for one800
Fan locationKnown for oneTop
Operational conditionsidentical
Operating temperature (T-T)Known for one0 - 40 °C
Certificates1 differ
CertificationDiffersCE, CB, TÜV, Semko, ErP, WEEECE, CB, TÜV, Semko (S)
Weight & dimensions3 differ
WidthDiffers140 mm150 mm
DepthDiffers150 mm160 mm
WeightDiffers1.97 kg2.24 kg
Packaging dataidentical
Package weightKnown for one2.65 kg
Other featuresidentical
Noise level (silent mode, <30%)Known for one13.7 dB
Noise level (quiet mode, 50%)Known for one13.8 dB
Noise level (full-load mode, 100%)Known for one14.6 dB
Package dimensions (WxDxH)Known for one248 x 328 x 102 mm
Power supply typeKnown for oneAC/DC

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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