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Product comparison · 2 power supply units

be quiet! Dark Power vs be quiet! Straight Power E8 CM

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  • 60specifications compared
  • 25differ
  • 35identical
  • 3known for one product only

Key differences

  • Total power
    • 750 W
    • 480 W
  • Peak power
    • 850 W
    • 550 W
  • Input current
    • 9 A
    • 8 A
  • Combined power (+3.3V)
    • 150 W
    • 140 W
  • Combined power (+12V)
    • 732 W
    • 420 W
  • Combined power (+5V)
    • 150 W
    • 140 W
  • Combined power (-12V)
    • 6 W
    • 3.6 W
  • Max output current (+12V)
    • 61 A
    • 35 A

Side by side

Differences highlightedShow differences only
63 specifications
A

be quiet!

Dark PowerView product
B

be quiet!

Straight Power E8 CMView product
Power13 differ
Total powerDiffers750 W480 W
Peak powerDiffers850 W550 W
AC input voltage100 - 240 V100 - 240 V
AC input frequency50 - 60 Hz50 - 60 Hz
Input currentDiffers9 A8 A
Maximum input current (@110V)Differs+12V1,+12V2,+12V3,+12V4,+3.3V,+5V,-12V+12V1,+12V2,+12V3,+12V4,+3.3V,+5V,+5Vsb,-12V
Power factor0.990.99
Power Factor Correction (PFC) typeActiveActive
Combined power (+3.3V)Differs150 W140 W
Combined power (+12V)Differs732 W420 W
Combined power (+5V)Differs150 W140 W
Combined power (-12V)Differs6 W3.6 W
Combined power (+5Vsb)15 W15 W
Max output current (+3.3V)24 A24 A
Max output current (+12V)Differs61 A35 A
Max output current (+5V)Differs30 A22 A
Max output current (-12V)Differs0.5 A0.3 A
Max output current (+5Vsb)3 A3 A
EfficiencyDiffers93%89%
Hold timeDiffers33 ms17 ms
Power protection featuresOver current, Over power, Over voltage, Short circuit, Under voltage, OverheatingOver current, Over power, Over voltage, Short circuit, Under voltage, Overheating
Ports & interfaces4 differ
Motherboard power connector20+4 pin ATX20+4 pin ATX
Number of SATA power connectorsDiffers95
Peripheral (Molex) power connectors (4-pin)Differs85
PCI Express power connectors (6-pin)Differs21
PCI Express power connectors (6+2 pin)Differs21
CPU power connector (4+4 pin)Known for oneYes
Floppy drive power connector22
Connector(s)IEC C14IEC C14
Cabling typeSemi-ModularSemi-Modular
I/O portsKnown for one4 x 4 Pin. Molex/3 Pin.
CPU P4 connector (4-pin)Known for one1
Performance2 differ
PurposePCPC
Power supply unit (PSU) form factorATXATX
80 PLUS certificationDiffers80 PLUS Gold80 PLUS Silver
ATX version2.32.3
EPS version2.922.92
Noise levelDiffers23.1 dB18.9 dB
Bearing technologyFDBFDB
Mean time between failures (MTBF)100000 h100000 h
Compatible productsMulti-GPU, NVIDIA Hybrid, AMD / ATI CrossFireMulti-GPU, NVIDIA Hybrid, AMD / ATI CrossFire
Design1 differ
Product colourBlackBlack
Fan diameter12 cm12 cm
Number of fans1 fan(s)1 fan(s)
Fan speedDiffers14351251
Fan locationSideSide
LED indicatorsNoNo
Operational conditionsidentical
Operating temperature (T-T)0 - 40 °C0 - 40 °C
Certificates1 differ
Compliance certificatesRoHSRoHS
CertificationDiffersEnergy Star 5.0, ErP, WEEE, RoHSErP, WEEE, RoHS, Energy Star 5.0
Safety regulation & standardsidentical
SafetyCE, CB, TUV, N, S, Fl, DCE, CB, TUV, N, S, Fl, D
Weight & dimensions1 differ
WeightDiffers2.47 kg2.26 kg
Packaging data1 differ
Package weightDiffers4.51 kg3.03 kg
Technical detailsidentical
Sustainability certificatesENERGY STARENERGY STAR
Other features2 differ
Dimensions (WxDxH)Differs200 x 150 x 86 mm160 x 150 x 86 mm
Package dimensions (WxDxH)Differs400 x 272 x 118 mm333 x 248 x 102 mm
Parallel processing technology supportHybrid CrossFireXHybrid CrossFireX
Power managementYesYes
Power over Ethernet (PoE)NoNo
Power supply typeAC/DCAC/DC
Redundant power supply (RPS) supportNoNo
Supported protocolsIntel C6Intel C6
Power rocker switchYesYes

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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