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Product comparison · 2 power supply units

be quiet! System Power 8 vs CoolBox S300 power supply unit

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  • 24specifications compared
  • 20differ
  • 4identical
  • 38known for one product only

Key differences

  • Total power
    • 500 W
    • 300 W
  • AC input voltage
    • 200 - 240 V
    • 180 - 240 V
  • AC input frequency
    • 50 Hz
    • 47 - 63 Hz
  • Max output current (+3.3V)
    • 24 A
    • 6 A
  • Max output current (+12V1)
    • 24 A
    • 10 A
  • Max output current (+12V2)
    • 20 A
    • 10 A
  • Max output current (+5V)
    • 15 A
    • 6 A
  • Max output current (-12V)
    • 0.3 A
    • 0.5 A

Side by side

Differences highlightedShow differences only
62 specifications
A

be quiet!

System Power 8View product
B

CoolBox

S300 power supply unit

Model S300

View product
Power10 differ
Total powerDiffers500 W300 W
AC input voltageDiffers200 - 240 V180 - 240 V
AC input frequencyDiffers50 Hz47 - 63 Hz
Input currentKnown for one4 A
Power factorKnown for one0.98
Power Factor Correction (PFC) typeKnown for oneActive
Combined power (+3.3V)Known for one110 W
Combined power (+12V)Known for one456 W
Combined power (+5V)Known for one110 W
Combined power (-12V)Known for one3.6 W
Combined power (+5Vsb)Known for one15 W
Max output current (+3.3V)Differs24 A6 A
Max output current (+12V)Known for one38 A
Max output current (+12V1)Differs24 A10 A
Max output current (+12V2)Differs20 A10 A
Max output current (+5V)Differs15 A6 A
Max output current (-12V)Differs0.3 A0.5 A
Max output current (+5Vsb)Differs3 A2 A
EfficiencyKnown for one87%
Hold timeKnown for one18 ms
Power protection featuresDiffersOver current, Over power, Over voltage, Overheating, Short circuit, Under voltageOver current, Over voltage, Short circuit
Ports & interfaces2 differ
Number of PATA power connectorsKnown for one2
Number of SATA power connectorsDiffers63
Peripheral (Molex) power connectors (4-pin)Differs01
PCI Express power connectors (6+2 pin)Known for one2
CPU power connector (4+4 pin)Known for oneYes
CPU P4 connector (4-pin)Known for one1
ATX power connector (20+4 pin)Known for oneYes
Floppy disk drive connectorKnown for oneYes
Performance2 differ
Power supply unit (PSU) form factorDiffersATXSFX
80 PLUS certificationDiffers80 PLUS80 PLUS Bronze
ATX versionKnown for one2.4
Noise levelKnown for one30.1 dB
Bearing technologyKnown for oneSleeve
Design2 differ
Product colourDiffersBlackSilver
Cooling typeKnown for oneActive
Fan diameterDiffers12 cm8 cm
Number of fansKnown for one1 fan(s)
Fan speedKnown for one2100
Fan locationKnown for oneTop
On/off switchKnown for oneYes
Certificatesidentical
Compliance certificatesKnown for oneRoHS
CertificationKnown for oneCE, CB, TÜV, RCM, CU
Weight & dimensions4 differ
WidthDiffers150 mm125 mm
DepthDiffers140 mm100 mm
HeightDiffers86 mm62 mm
WeightDiffers1.82 kg593 g
Packaging dataidentical
Package widthKnown for one97 mm
Package depthKnown for one195 mm
Package heightKnown for one268 mm
Package weightKnown for one2.17 kg
Package typeKnown for oneBox
Technical detailsidentical
Sustainability certificatesKnown for oneENERGY STAR
Other featuresidentical
Noise level (silent mode, <30%)Known for one15.5 dB
Noise level (quiet mode, 50%)Known for one16.4 dB
Noise level (full-load mode, 100%)Known for one30.1 dB
Operational conditionsidentical
Operating temperature (T-T)Known for one0 - 50 °C
Operating relative humidity (H-H)Known for one10 - 85%

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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