Ultra X4 1050W Power Supply Review

Testing (Continued):

Efficiency and Power Factor:

 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

Ultra X4 1050W
Output & Efficiency @ 110VAC
DC Load (W)	AC Load (W)	PF	Efficiency (%)	Pass/Fail
0	8	0.52	N/A	N/A
202	252	0.96	80	Pass
525	620	0.99	85	Pass
1063	1343	1.00	79	Pass

 

Ultra X4 1050W
Output & Efficiency @ 230VAC
DC Load (W)	AC Load (W)	PF	Efficiency (%)	Pass/Fail
0	10	0.25	N/A	N/A
202	247	0.87	82	Pass
526	607	0.92	87	Pass
1064	1270	0.96	84	Pass

 

The efficiency of the Ultra X4 1050W is well above that required by the ATX12V V2.2 specification but that is usually the case for most high-end power supplies. The ATX12V V2.2 specification is really aimed at mainstream manufacturers but it is still the benchmark for my testing methodology although the computer enthuiast today expects a little more. Those of you who pay a little more attention will note high power factor levels with reduced efficiency at 110VAC and lower power factor levels and greater efficiency at 230VAC but this is usually the case. No real problems here apart from a small glitch in the claimed 80 Plus certification on which I will have more to say in the conclusion.

 

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 = 5mv/div, Timebase = 10uS/div

 

AC Ripple On 5V0 Rail at 230VAC

Oscilloscope settings: Amplitude = 5mv/div, Timebase = 10uS/div

 

AC Ripple On 12V1 Rail at 230VAC

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

 

Ultra X4 1050W
AC Ripple/Noise
DC Rail	+3V3	+5V0	+12V	-12V0	+5VSB
Ripple (mV p-p)	25	35	100	100	50
Pass/Fail	Pass	Pass	Pass	Pass	Pass

 

All levels of noise/ripple fall within the limits set down by the ATX12V V2.2 specification so an overall pass in this section. They are however a little higher than I would like to see on a power supply aimed more at the enthusiast rather than mainstream computer user, especially on the 12V rail.