Product comparison · 2 power supply units

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

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

Key differences

Total power
- Dark Power:750 W
- Straight Power E8 CM:480 W
Peak power
- Dark Power:850 W
- Straight Power E8 CM:550 W
Input current
- Dark Power:9 A
- Straight Power E8 CM:8 A
Combined power (+3.3V)
- Dark Power:150 W
- Straight Power E8 CM:140 W
Combined power (+12V)
- Dark Power:732 W
- Straight Power E8 CM:420 W
Combined power (+5V)
- Dark Power:150 W
- Straight Power E8 CM:140 W
Combined power (-12V)
- Dark Power:6 W
- Straight Power E8 CM:3.6 W
Max output current (+12V)
- Dark Power:61 A
- Straight Power E8 CM:35 A

Side by side

Differences highlightedShow differences only

Comparison of Dark Power, Straight Power E8 CM
63 specifications	A be quiet! Dark Power View product	B be quiet! Straight Power E8 CM View product
Power13 differ
Total powerDiffers	750 W	480 W
Peak powerDiffers	850 W	550 W
Input currentDiffers	9 A	8 A
Maximum input current (@110V)Differs	+12V1,+12V2,+12V3,+12V4,+3.3V,+5V,-12V	+12V1,+12V2,+12V3,+12V4,+3.3V,+5V,+5Vsb,-12V
Combined power (+3.3V)Differs	150 W	140 W
Combined power (+12V)Differs	732 W	420 W
Combined power (+5V)Differs	150 W	140 W
Combined power (-12V)Differs	6 W	3.6 W
Max output current (+12V)Differs	61 A	35 A
Max output current (+5V)Differs	30 A	22 A
Max output current (-12V)Differs	0.5 A	0.3 A
EfficiencyDiffers	93%	89%
Hold timeDiffers	33 ms	17 ms
Ports & interfaces4 differ
Number of SATA power connectorsDiffers	9	5
Peripheral (Molex) power connectors (4-pin)Differs	8	5
PCI Express power connectors (6-pin)Differs	2	1
PCI Express power connectors (6+2 pin)Differs	2	1
CPU power connector (4+4 pin)Known for one	Yes	Unknown — not stated by the source
I/O portsKnown for one	4 x 4 Pin. Molex/3 Pin.	Unknown — not stated by the source
CPU P4 connector (4-pin)Known for one	Unknown — not stated by the source	1
Performance2 differ
80 PLUS certificationDiffers	80 PLUS Gold	80 PLUS Silver
Noise levelDiffers	23.1 dB	18.9 dB
Design1 differ
Fan speedDiffers	1435	1251
Certificates1 differ
CertificationDiffers	Energy Star 5.0, ErP, WEEE, RoHS	ErP, WEEE, RoHS, Energy Star 5.0
Weight & dimensions1 differ
WeightDiffers	2.47 kg	2.26 kg
Packaging data1 differ
Package weightDiffers	4.51 kg	3.03 kg
Other features2 differ
Dimensions (WxDxH)Differs	200 x 150 x 86 mm	160 x 150 x 86 mm
Package dimensions (WxDxH)Differs	400 x 272 x 118 mm	333 x 248 x 102 mm

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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