Thermaltake Litepower 450W Power Supply Review

Testing (Continued):

Efficiency and Power Factor:

 

 

 

 

 

 

 

 

 

 

Output & Efficiency @ 110VAC
DC Load (W)	AC Load (W)	PF	Efficiency (%)	Pass/Fail
0	3	0.72	N/A	N/A
112	135	0.97	83	Pass
242	281	0.96	86	Pass
448	541	0.94	83	Pass

 

Output & Efficiency @ 230VAC
DC Load (W)	AC Load (W)	PF	Efficiency (%)	Pass/Fail
0	5	0.30	N/A	N/A
113	135	0.81	84	Pass
242	276	0.96	88	Pass
448	530	0.97	85	Pass

 

The efficiency and power factor of the Thermaltake Litepower 450W are excellent, and my testing confirmed its 80 Plus Bronze certification at 110VAC and 230VAC. Power factor requirements for 80 Plus Bronze certification are 0.9 or better at 50% loading. A 0.81 level at 230VAC is unusual, but the power supply still meets all the requirements.

 

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 = 5uS/div

 

AC Ripple On 5V0 Rail at 230VAC

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

 

AC Ripple On 12V1 Rail at 230VAC

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

 

AC Ripple/Noise @ 230VAC
DC Rail	+3V3	+5V0	+12V	-12V0	+5VSB
Ripple (mV p-p)	15	30	30	25	20

 

An excellent set of results for AC ripple/noise. The ripple/noise on the 12V rail is amongst the lowest I have seen, but then again, this is the lowest wattage power supply I have tested to date and it is to be expected.