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Product comparison · 2 power supply units

be quiet! Straight Power 11 vs be quiet! System Power 9

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  • 59specifications compared
  • 36differ
  • 23identical
  • 10known for one product only

Key differences

  • Total power
    • 750 W
    • 700 W
  • AC input voltage
    • 100 - 240 V
    • 200 - 240 V
  • AC input frequency
    • 50 - 60 Hz
    • 50 Hz
  • Input current
    • 10 A
    • 6 A
  • Power factor
    • 0.99
    • 0.95
  • Combined power (+3.3V)
    • 150 W
    • 130 W
  • Combined power (+12V)
    • 750 W
    • 672 W
  • Combined power (+5V)
    • 150 W
    • 130 W

Side by side

Differences highlightedShow differences only
69 specifications
A

be quiet!

Straight Power 11View product
B

be quiet!

System Power 9View product
Power16 differ
Total powerDiffers750 W700 W
Peak powerKnown for one820 W
AC input voltageDiffers100 - 240 V200 - 240 V
AC input frequencyDiffers50 - 60 Hz50 Hz
Input currentDiffers10 A6 A
Power factorDiffers0.990.95
Power Factor Correction (PFC) typeActiveActive
Combined power (+3.3V)Differs150 W130 W
Combined power (+12V)Differs750 W672 W
Combined power (+5V)Differs150 W130 W
Combined power (-12V)Differs6 W3.6 W
Combined power (+5Vsb)15 W15 W
Max output current (+3.3V)Differs25 A24 A
Max output current (+12V1)Differs20 A33 A
Max output current (+12V2)Differs20 A25 A
Max output current (+12V3)Known for one24 A
Max output current (+12V4)Known for one24 A
Max output current (+5V)Differs25 A15 A
Max output current (-12V)Differs0.5 A0.3 A
Max output current (+5Vsb)3 A3 A
EfficiencyDiffers93%89%
Hold timeDiffers19.6 ms17 ms
Power protection featuresOver current, Over power, Over voltage, Overheating, Short circuit, Under voltageOver current, Over power, Over voltage, Overheating, Short circuit, Under voltage
Ports & interfaces7 differ
Motherboard power connector20+4 pin ATX20+4 pin ATX
Motherboard power cable lengthDiffers60 cm55 cm
Number of PATA power connectorsDiffers42
Number of SATA power connectorsDiffers116
SATA power cable lengthDiffers550 mm350,550 mm
PCI Express power connectors (6+2 pin)44
PCI Express power cable lengthDiffers60 cm50 cm
CPU power connector (4+4 pin)YesYes
CPU power cable lengthDiffers70 cm60 cm
Floppy disk drive connectorKnown for oneYes
PCI Express connectorKnown for oneYes
Cabling typeDiffersFully-ModularNon-Modular
Performance2 differ
PurposePCPC
Power supply unit (PSU) form factorATXATX
80 PLUS certificationDiffers80 PLUS Gold80 PLUS Bronze
ATX version2.42.4
EPS version2.922.92
Silent modeYesYes
Bearing technologyDiffersFDBSleeve
Design1 differ
Product colourBlackBlack
Cooling typeKnown for oneActive
Fan diameterDiffers13.5 cm12 cm
Number of fans1 fan(s)1 fan(s)
IlluminationNoNo
On/off switchYesYes
Certificates1 differ
Compliance certificatesRoHSRoHS
CertificationDiffersCE, FCC, TÜV, cTUVus, RCM, BSMI, CUCE, CB, TÜV, RCM, CU
Weight & dimensions2 differ
Width150 mm150 mm
DepthDiffers170 mm140 mm
Height86 mm86 mm
WeightDiffers1.78 kg2.07 kg
Packaging data4 differ
ManualYesYes
Package widthDiffers248 mm97 mm
Package depthDiffers328 mm268 mm
Package heightDiffers102 mm195 mm
Package weightDiffers3.34 kg2.38 kg
Package typeKnown for oneBox
Technical detailsidentical
Sustainability certificatesENERGY STARENERGY STAR
Logistics dataidentical
Harmonized System (HS) code8473302084733020
Other features3 differ
Screws includedYesYes
Cable ties includedKnown for oneYes
Noise level (silent mode, <30%)Differs8.4 dB10.6 dB
Noise level (quiet mode, 50%)Differs9.01 dB15.4 dB
Noise level (full-load mode, 100%)Differs21.23 dB31.7 dB
Cable managementKnown for oneYes
Packaging contentidentical
Cables includedKnown for oneAC

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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