Product comparison · 2 power supply units

be quiet! E8-CM-680W power supply unit 20+4 pin ATX ATX Black vs be quiet! Straight Power E8

47specifications compared
17differ
30identical
25known for one product only

Key differences

Total power
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:680 W
- Straight Power E8:600 W
Combined power (+3.3V)
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:75 W
- Straight Power E8:140 W
Combined power (+12V)
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:624 W
- Straight Power E8:576 W
Combined power (+5V)
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:85 W
- Straight Power E8:140 W
Max output current (+12V)
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:52 A
- Straight Power E8:48 A
Max output current (+5V)
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:28 A
- Straight Power E8:24 A
Number of SATA power connectors
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:7
- Straight Power E8:6
Peripheral (Molex) power connectors (4-pin)
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:7
- Straight Power E8:5

Side by side

Differences highlightedShow differences only

Comparison of E8-CM-680W, Straight Power E8
72 specifications	A be quiet! E8-CM-680W power supply unit 20+4 pin ATX ATX Black Model E8-CM-680W View product	B be quiet! Straight Power E8 View product
Power8 differ
Total powerDiffers	680 W	600 W
Peak powerKnown for one	750 W	Unknown — not stated by the source
AC input voltage	100 - 240 V	100 - 240 V
AC input frequency	50 - 60 Hz	50 - 60 Hz
Input currentKnown for one	10 A	Unknown — not stated by the source
Maximum input current (@110V)Differs	+12V1,+12V2,+3.3V,+5V,+5Vsb,-12V	+12V1,+12V2,+12V3,+3.3V,+5V,+5Vsb,-12V
Power factorKnown for one	0.99	Unknown — not stated by the source
Power Factor Correction (PFC) type	Active	Active
Combined power (+3.3V)Differs	75 W	140 W
Combined power (+12V)Differs	624 W	576 W
Combined power (+5V)Differs	85 W	140 W
Combined power (-12V)	6 W	6 W
Combined power (+5Vsb)	15 W	15 W
Max output current (+3.3V)	24 A	24 A
Max output current (+12V)Differs	52 A	48 A
Max output current (+5V)Differs	28 A	24 A
Max output current (-12V)	0.5 A	0.5 A
Max output current (+5Vsb)	3 A	3 A
Hold timeKnown for one	19 ms	Unknown — not stated by the source
Power protection featuresDiffers	Over current, Over power, Over voltage, Short circuit, Under voltage, Overheating	Over current, Over power, Over voltage, Overload, Short circuit, Under voltage, Overheating
EfficiencyKnown for one	Unknown — not stated by the source	91%
Ports & interfaces4 differ
Motherboard power connector	20+4 pin ATX	20+4 pin ATX
Number of SATA power connectorsDiffers	7	6
Peripheral (Molex) power connectors (4-pin)Differs	7	5
PCI Express power connectors (6-pin)Differs	2	1
PCI Express power connectors (6+2 pin)	2	2
CPU P4 connector (4-pin)	1	1
Floppy drive power connector	2	2
CPU power connectors (8-pin)Known for one	1	Unknown — not stated by the source
Connector(s)	IEC C14	IEC C14
Cabling typeDiffers	Semi-Modular	Non-Modular
Monitor outletKnown for one	No	Unknown — not stated by the source
CPU power connector (4+4 pin)Known for one	Unknown — not stated by the source	Yes
Performance1 differ
Purpose	PC	PC
Power supply unit (PSU) form factor	ATX	ATX
80 PLUS certification	80 PLUS Silver	80 PLUS Silver
ATX version	2.3	2.3
EPS version	2.92	2.92
Noise levelDiffers	21.8 dB	20.5 dB
Bearing technologyKnown for one	FDB	Unknown — not stated by the source
Mean time between failures (MTBF)	100000 h	100000 h
Compatible productsKnown for one	PC	Unknown — not stated by the source
Designidentical
Product colour	Black	Black
Cooling typeKnown for one	Active	Unknown — not stated by the source
Fan diameter	12 cm	12 cm
Number of fans	1 fan(s)	1 fan(s)
Fan speedKnown for one	1416	Unknown — not stated by the source
Fan location	Side	Side
IlluminationKnown for one	No	Unknown — not stated by the source
LED indicators	No	No
Operational conditionsidentical
Operating temperature (T-T)Known for one	0 - 40 °C	Unknown — not stated by the source
Certificates1 differ
Compliance certificatesKnown for one	RoHS	Unknown — not stated by the source
CertificationDiffers	ErP, WEEE, RoHS	CE, CB, D, N, S, TUV
Safety regulation & standards1 differ
SafetyDiffers	CE, CB, TUV, N, S, Fl, D	FL
Weight & dimensionsidentical
WidthKnown for one	150 mm	Unknown — not stated by the source
DepthKnown for one	160 mm	Unknown — not stated by the source
HeightKnown for one	86 mm	Unknown — not stated by the source
WeightKnown for one	2.28 kg	Unknown — not stated by the source
Packaging data1 differ
Package weightDiffers	3.12 kg	3.01 kg
Case or master carton dimensions (W x D x H)Known for one	661 x 282 x 358 mm	Unknown — not stated by the source
Case or master carton quantityKnown for one	6 pc(s)	Unknown — not stated by the source
Case or master carton weightKnown for one	20 kg	Unknown — not stated by the source
Technical detailsidentical
Sustainability certificatesKnown for one	ENERGY STAR	Unknown — not stated by the source
Other features1 differ
Package dimensions (WxDxH)	328 x 248 x 102 mm	328 x 248 x 102 mm
Parallel processing technology supportDiffers	Hybrid CrossFireX, Quad-GPU SLI	Not supported
Power management	Yes	Yes
Power over Ethernet (PoE)	No	No
Power supply type	AC/DC	AC/DC
Redundant power supply (RPS) support	No	No
Power rocker switch	Yes	Yes
Dimensions (WxDxH)Known for one	Unknown — not stated by the source	160 x 150 x 86 mm
Ports quantityKnown for one	Unknown — not stated by the source	20

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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