Product comparison · 2 power supply units

be quiet! System Power 11 450W vs be quiet! System Power 11 650W

Key differences

Total power
- System Power 11 450W:450 W
- System Power 11 650W:650 W
Combined power (+3.3V)
- System Power 11 450W:110 W
- System Power 11 650W:120 W
Combined power (+12V)
- System Power 11 450W:450 W
- System Power 11 650W:650 W
Combined power (+5V)
- System Power 11 450W:110 W
- System Power 11 650W:120 W
Max output current (+12V1)
- System Power 11 450W:37.5 A
- System Power 11 650W:54.17 A
Efficiency
- System Power 11 450W:89%
- System Power 11 650W:89.7%
Hold time
- System Power 11 450W:16.86 ms
- System Power 11 650W:17.04 ms
Noise level
- System Power 11 450W:19.1 dB
- System Power 11 650W:30.9 dB

Differences highlightedShow differences only

Comparison of System Power 11 450W, System Power 11 650W
62 specifications	A be quiet! System Power 11 450W View product	B be quiet! System Power 11 650W View product
Power7 differ
Total powerDiffers	450 W	650 W
Combined power (+3.3V)Differs	110 W	120 W
Combined power (+12V)Differs	450 W	650 W
Combined power (+5V)Differs	110 W	120 W
Max output current (+12V1)Differs	37.5 A	54.17 A
EfficiencyDiffers	89%	89.7%
Hold timeDiffers	16.86 ms	17.04 ms
Ports & interfacesidentical
PCI Express power connectors (12-pin)Known for one	Unknown — not stated by the source	1
CPU P4 connector (4-pin)Known for one	Unknown — not stated by the source	1
Performance1 differ
Noise levelDiffers	19.1 dB	30.9 dB
Design1 differ
Fan speedDiffers	0 - 1800 RPM	0 - 2100 RPM
Weight & dimensions1 differ
WeightDiffers	1.7 kg	1.97 kg
Packaging data1 differ
Package weightDiffers	2.1 kg	2.4 kg
Logistics data1 differ
Shipping (inner) case gross weightDiffers	13.6 kg	15.2 kg

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.