Antec Truepower Quattro 1000W Power Supply Review - Revisited

Testing (Continued):

Efficiency and Power Factor:

Power factor levels are very good and compare well with other power supplies in this class with levels maintained at well above 0.9, even on 230VAC which is unusual – 110VAC is never usually a problem when active power factor correction is implemented. The packaging of the Antec Truepower Quattro 1000W indicates 80 Plus standard certification and the 80 Plus Organization website gives it  80 Plus Bronze certification – which one is correct? Bronze certification requires efficiencies of 82% at 20% load, 85% at 50% load and 82% at 100% load. The Antec Truepower Quattro 1000W falls well short of this following the OCC testing methodology. Standard 80 Plus certification on the other hand requires 80% efficiency across the same load levels and giving the power supply the benefit of the doubt and some leeway with measurement accuracies, 79%, 83% and 79% isn't too far of the mark. Taking the ATX12V V2.2 specification as the standard benchmark, the Antec Truepower Quattro 1000W easily merits a pass in this section.

AC Ripple On DC Outputs:

I have consistently found the AC ripple levels on the DC rails to be more or less equal with a 110VAC or 230VAC mains supply. The results given below are for 230VAC only, but I will continue to check the levels at 110VAC during testing and publish them below if they differ in any way.

AC Ripple On 3V3 Rail at 230VAC

Oscilloscope settings: Amplitude = 20mv/div, Timebase = 10uS/div

AC Ripple On 5V0 Rail at 230VAC

Oscilloscope settings: Amplitude = 20mv/div, Timebase = 10uS/div

AC Ripple On 12V1 Rail at 230VAC

Oscilloscope settings: Amplitude = 20mv/div, Timebase = 10uS/div

The AC ripple/noise levels on the rails of the Antec Truepower Quattro 1000W aren't as good as some other power supplies in this class, with levels at or very near to the maximum levels permitted by the ATX12V V2.2 specification, but a pass nonetheless.