Product comparison · 2 power supply units

be quiet! SFX L vs be quiet! Straight Power 11

52specifications compared
29differ
23identical
20known for one product only

Key differences

Total power
- SFX L:500 W
- Straight Power 11:750 W
Peak power
- SFX L:550 W
- Straight Power 11:820 W
Power factor
- SFX L:0.95
- Straight Power 11:0.99
Combined power (+3.3V)
- SFX L:105 W
- Straight Power 11:150 W
Combined power (+12V)
- SFX L:500 W
- Straight Power 11:750 W
Combined power (+5V)
- SFX L:105 W
- Straight Power 11:150 W
Combined power (-12V)
- SFX L:3.6 W
- Straight Power 11:6 W
Max output current (+3.3V)
- SFX L:20 A
- Straight Power 11:25 A

Side by side

Differences highlightedShow differences only

Comparison of SFX L, Straight Power 11
72 specifications	A be quiet! SFX L View product	B be quiet! Straight Power 11 View product
Power11 differ
Total powerDiffers	500 W	750 W
Peak powerDiffers	550 W	820 W
Power factorDiffers	0.95	0.99
Combined power (+3.3V)Differs	105 W	150 W
Combined power (+12V)Differs	500 W	750 W
Combined power (+5V)Differs	105 W	150 W
Combined power (-12V)Differs	3.6 W	6 W
Max output current (+3.3V)Differs	20 A	25 A
Max output current (+12V1)Known for one	Unknown — not stated by the source	20 A
Max output current (+12V2)Known for one	Unknown — not stated by the source	20 A
Max output current (+12V3)Known for one	Unknown — not stated by the source	24 A
Max output current (+12V4)Known for one	Unknown — not stated by the source	24 A
Max output current (+5V)Differs	20 A	25 A
Max output current (-12V)Differs	0.3 A	0.5 A
EfficiencyDiffers	92%	93%
Hold timeKnown for one	Unknown — not stated by the source	19.6 ms
Max output current (+12V)Known for one	41.7 A	Unknown — not stated by the source
Ports & interfaces3 differ
Motherboard power cable lengthDiffers	30 cm	60 cm
Number of PATA power connectorsKnown for one	Unknown — not stated by the source	4
Number of SATA power connectorsDiffers	6	11
SATA power cable lengthDiffers	600,800 mm	550 mm
PCI Express power cable lengthKnown for one	Unknown — not stated by the source	60 cm
CPU power cable lengthKnown for one	Unknown — not stated by the source	70 cm
Floppy disk drive connectorKnown for one	Unknown — not stated by the source	Yes
PCI Express connectorKnown for one	Unknown — not stated by the source	Yes
Peripheral (Molex) power connectors (4-pin)Known for one	3	Unknown — not stated by the source
Performance2 differ
Power supply unit (PSU) form factorDiffers	SFX	ATX
EPS versionKnown for one	Unknown — not stated by the source	2.92
Silent modeKnown for one	Unknown — not stated by the source	Yes
Bearing technologyDiffers	Sleeve	FDB
Mean time between failures (MTBF)Known for one	100000 h	Unknown — not stated by the source
Design1 differ
Cooling typeKnown for one	Unknown — not stated by the source	Active
Fan diameterDiffers	12 cm	13.5 cm
IlluminationKnown for one	Unknown — not stated by the source	No
Certificates1 differ
CertificationDiffers	CE, CB, TÜV, FCC, cTUVus, RCM	CE, FCC, TÜV, cTUVus, RCM, BSMI, CU
Weight & dimensions4 differ
WidthDiffers	125 mm	150 mm
DepthDiffers	130 mm	170 mm
HeightDiffers	64 mm	86 mm
WeightDiffers	1.14 kg	1.78 kg
Packaging data4 differ
Package widthDiffers	205 mm	248 mm
Package depthDiffers	220 mm	328 mm
Package heightDiffers	80 mm	102 mm
Package weightDiffers	2.02 kg	3.34 kg
Package typeKnown for one	Box	Unknown — not stated by the source
Logistics dataidentical
Harmonized System (HS) codeKnown for one	Unknown — not stated by the source	84733020
Other features3 differ
Noise level (silent mode, <30%)Differs	9.9 dB	8.4 dB
Noise level (quiet mode, 50%)Differs	14 dB	9.01 dB
Noise level (full-load mode, 100%)Differs	28.5 dB	21.23 dB
Packaging contentidentical
Cables includedKnown for one	AC, PCIe, SATA	Unknown — not stated by the source

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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