We conducted several tests with this power supply, as described in the article Hardware Secrets Power Supply Test Methodology.

First we tested this power supply with five different load patterns, trying to pull around 20%, 40%, 60%, 80%, and 100% of its labeled maximum capacity (actual percentage used listed under “% Max Load”), watching how the reviewed unit behaved under each load. In the table below we list the load patterns we used and the results for each load.

If you add all the power listed for each test, you may find a different value than what is posted under “Total” below. Since each output can vary slightly (e.g., the +5 V output working at 5.10 V), the actual total amount of power being delivered is slightly different than the calculated value. On the “Total” row we are using the real amount of power being delivered, as measured by our load tester.

The +12V1 and +12V2 inputs listed below are the two +12 V independent inputs from our load tester and during this test both were connected to the single rail provided by the reviewed unit.

Input	Test 1	Test 2	Test 3	Test 4	Test 5
+12V1	7 A (84 W)	13 A (156 W)	20 A (240 W)	26 A (312 W)	33 A (396 W)
+12V2	6 A (72 W)	12 A (144 W)	19 A (228 W)	26 A (312 W)	30.5 A (396 W)
+5V	2 A (10 W)	6 A (30 W)	8 A (40 W)	10 A (50 W)	15 A (75 W)
+3.3 V	2 A (6.6 W)	6 A (19.8 W)	8 A (26.4 W)	10 A (33 W)	15 A (49.5 W)
+5VSB	1 A (5 W)	2 A (10 W)	2 A (10 W)	3 A (15 W)	3 A (15 W)
-12 V	0.5 A (6 W)	0.5 A (6 W)	0.5 A (6 W)	0.5 A (6 W)	0.5 A (6 W)
Total	186.9 W	371.4 W	556.2 W	732.7 W	908.8 W
% Max Load	20.5%	40.8%	61.1%	80.5%	99.9%
Room Temp.	48.6º C	45.4º C	46.8º C	47.3º C	48.3º C
PSU Temp.	50.0º C	49.2º C	47.4º C	47.7º C	53.5º C
Voltage Stability	Pass	Pass	Pass	Pass	Pass
Ripple and Noise	Pass	Pass	Pass	Pass	Pass
AC Power	216.1 W	424.3 W	640.0 W	858.0 W	1090.0 W
Efficiency	86.5%	87.5%	86.9%	85.4%	83.4%
AC Voltage	112.1 V	109.8 V	107.3 V	105.1 V	100.7 V
Power Factor	0.954	0.972	0.979	0.986	0.988
Final Result	Pass	Pass	Pass	Pass	Pass

Silencer 910 achieved an outstanding efficiency, especially for a 910 W product. If you pull up to 80% from its labeled capacity (i.e., up to 728 W) you will have an efficiency of at least 85%. WOW. At full load (910 W) efficiency was 83.4%, which isn’t bad at all!

Noise and ripple were very low during all tests, including -12 V (maximum of 35.6 mV) and +5VSB (maximum of 17.4 mV). Below you can see the results for test number five. As we always point out, the limits are 120 mV for +12 V and 50 mV for +5 V and +3.3 V and all numbers are peak-to-peak figures.

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Figure 18: +12V1 input from load tester at 908.8 W (31.8 mV).

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Figure 19: +12V2 input from load tester at 908.8 W (31.6 mV).

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Figure 20: +5V rail with power supply delivering 908.8 W (18.6 mV).

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Figure 21: +3.3 V rail with power supply delivering 908.8 W (15.2 mV).

Now let’s see if we could pull more than 910 W from this unit.