Product comparison · 2 power supply units

be quiet! E8-CM-680W power supply unit 20+4 pin ATX ATX Black vs be quiet! TFX-300W power supply unit 20+4 pin ATX ATX Black

49specifications compared
27differ
22identical
21known for one product only

Key differences

Total power
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:680 W
- TFX-300W power supply unit 20+4 pin ATX ATX Black:300 W
Input current
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:10 A
- TFX-300W power supply unit 20+4 pin ATX ATX Black:4.5 A
Power factor
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:0.99
- TFX-300W power supply unit 20+4 pin ATX ATX Black:0.9
Combined power (+3.3V)
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:75 W
- TFX-300W power supply unit 20+4 pin ATX ATX Black:110 W
Combined power (+12V)
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:624 W
- TFX-300W power supply unit 20+4 pin ATX ATX Black:250 W
Combined power (+5V)
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:85 W
- TFX-300W power supply unit 20+4 pin ATX ATX Black:110 W
Max output current (+3.3V)
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:24 A
- TFX-300W power supply unit 20+4 pin ATX ATX Black:20 A
Max output current (+12V)
- E8-CM-680W power supply unit 20+4 pin ATX ATX Black:52 A
- TFX-300W power supply unit 20+4 pin ATX ATX Black:20.83 A

Side by side

Differences highlightedShow differences only

Comparison of E8-CM-680W, TFX-300W
70 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! TFX-300W power supply unit 20+4 pin ATX ATX Black Model TFX-300W View product
Power12 differ
Total powerDiffers	680 W	300 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 currentDiffers	10 A	4.5 A
Maximum input current (@110V)	+12V1,+12V2,+3.3V,+5V,+5Vsb,-12V	+12V1,+12V2,+3.3V,+5V,+5Vsb,-12V
Power factorDiffers	0.99	0.9
Power Factor Correction (PFC) typeKnown for one	Active	Unknown — not stated by the source
Combined power (+3.3V)Differs	75 W	110 W
Combined power (+12V)Differs	624 W	250 W
Combined power (+5V)Differs	85 W	110 W
Combined power (-12V)Known for one	6 W	Unknown — not stated by the source
Combined power (+5Vsb)Known for one	15 W	Unknown — not stated by the source
Max output current (+3.3V)Differs	24 A	20 A
Max output current (+12V)Differs	52 A	20.83 A
Max output current (+5V)Differs	28 A	22 A
Max output current (-12V)	0.5 A	0.5 A
Max output current (+5Vsb)Differs	3 A	2 A
Hold timeDiffers	19 ms	17 ms
Power protection featuresDiffers	Over current, Over power, Over voltage, Short circuit, Under voltage, Overheating	Over current, Over power, Over voltage, Short circuit, Under voltage
EfficiencyKnown for one	Unknown — not stated by the source	83%
Ports & interfaces4 differ
Motherboard power connector	20+4 pin ATX	20+4 pin ATX
Number of SATA power connectorsDiffers	7	2
Peripheral (Molex) power connectors (4-pin)Differs	7	3
PCI Express power connectors (6-pin)Known for one	2	Unknown — not stated by the source
PCI Express power connectors (6+2 pin)Known for one	2	Unknown — not stated by the source
CPU P4 connector (4-pin)	1	1
Floppy drive power connectorDiffers	2	1
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
Performance3 differ
Purpose	PC	PC
Power supply unit (PSU) form factor	ATX	ATX
80 PLUS certificationDiffers	80 PLUS Silver	80 PLUS
ATX version	2.3	2.3
EPS versionKnown for one	2.92	Unknown — not stated by the source
Noise levelKnown for one	21.8 dB	Unknown — not stated by the source
Bearing technologyDiffers	FDB	Rifle
Mean time between failures (MTBF)	100000 h	100000 h
Compatible productsDiffers	PC	Intel C6
Design2 differ
Product colour	Black	Black
Cooling typeKnown for one	Active	Unknown — not stated by the source
Fan diameterDiffers	12 cm	8 cm
Number of fans	1 fan(s)	1 fan(s)
Fan speedDiffers	1416	3600
Fan location	Side	Side
IlluminationKnown for one	No	Unknown — not stated by the source
LED indicators	No	No
Operational conditions1 differ
Operating temperature (T-T)Differs	0 - 40 °C	10 - 50 °C
Certificates1 differ
Compliance certificates	RoHS	RoHS
CertificationDiffers	ErP, WEEE, RoHS	ENERGY STAR 4.0, ErP, WEEE, RoHS
Safety regulation & standardsidentical
Safety	CE, CB, TUV, N, S, Fl, D	CE, CB, TUV, N, S, Fl, D
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	1.41 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 certificates	ENERGY STAR	ENERGY STAR
Other features3 differ
Package dimensions (WxDxH)Differs	328 x 248 x 102 mm	159 x 195 x 80 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 switchDiffers	Yes	No
Dimensions (WxDxH)Known for one	Unknown — not stated by the source	70 x 85 x 177 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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