Corsair HX1000W Review

Testing (Continued):

Efficiency and Power Factor:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output & Efficiency at 110VAC
DC Load (W)	AC Load (W)	PF	Efficiency (%)	Pass/Fail
0	8	0.50	N/A	N/A
213	267	0.99	80	Pass
562	666	1.00	84	Pass
986	1187	0.98	83	Pass

 

Output & Efficiency at 230VAC
DC Load (W)	AC Load (W)	PF	Efficiency (%)	Pass/Fail
0	10	0.23	N/A	N/A
213	265	0.93	80	Pass
563	658	0.96	85	Pass
988	1173	0.96	84	Pass

 

The efficiency and power factor levels for the Corsair HX1000W are excellent and loaded at approximately half its rated maximum, which would be a realistic load for overclocked high end gaming rigs, it gives a very credible 85% efficiency. Power factor levels although not quite reaching the 0.99 mark claimed at 230VAC are however maintained at 110VAC and easily exceed the 80 Plus minimum level of 0.90.

 

AC Ripple On DC Outputs:

 

Firstly I apologize for the poor quality photographs. My USB oscilloscope has gone to the "Electrical Items Only Skip" in the sky. The photographs below are from my trusty old CRT oscilloscope. It carries a valid calibration certificate but the triggering and focus could be better which is why the tracing appears blurred, it just refused to lock onto the high frequency signal. It does however illustrate the amplitude of the signal, which to be honest, is all I am interested in. I made ripple measurements at 230VAC and 110VAC but they are very similar and the photographs below show 230VAC ripple only.

 

AC Ripple On 3V3 Rail at 230VAC

(Amplitude: 10mV/div | Timebase: 10uS/div)

 

AC Ripple On 5V0 Rail at 230VAC

(Amplitude: 5mV/div | Timebase: 10uS/div)

 

AC Ripple On 12V Rail at 230VAC

(Amplitude: 20mV/div | Timebase: 10uS/div)

 

Corsair HX1000W AC Ripple/Noise Measurements
DC Output	+3V3	+5V0	+12V1	+12V2	-12V0	+5VSB
Ripple (mV p-p)	20	10	60	60	60	30
Pass/Fail	Pass	Pass	Pass	Pass	Pass	Pass

 

The Corsair HX1000W noise/ripple levels, although not exceptional, are still excellent and fall well within the levels set down by the ATX12V specification. Don't forget that these levels were measured with the power supply delivering almost one kilowatt of DC power!