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 the behavior of the reviewed unit 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 powers listed for each test, you may find a different value than what is posted under “Total” below. Since each output can have a slight variation (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. In the “Total” row, we are using the real amount of power being delivered, as measured by our load tester.
The +12VA and +12VB inputs listed below are the two +12 V independent inputs from our load tester. During this test, the +12VA input was connected to the power supply’s +12V1 and +12V3 rails, while the +12VB input was connected to the power supply’s +12V2 rail.
|Input||Test 1||Test 2||Test 3||Test 4||Test 5|
|+12VA||5 A (60 W)||10.5 A (126 W)||15.5 A (186 W)||20.5 A (246 W)||26 A (312 W)|
|+12VB||5 A (60 W)||10.5 A (126 W)||15.5 A (186 W)||20.5 A (246 W)||25.5 A (306 W)|
|+5 V||1 A (5 W)||2 A (10 W)||4 A (20 W)||6 A (30 W)||8 A (40 W)|
|+3.3 V||1 A (3.3 W)||2 A (6.6 W)||4 A (13.2 W)||6 A (19.8 W)||8 A (26.4 W)|
|+5VSB||1 A (5 W)||1.5 A (7.5 W)||2 A (10 W)||2.5 A (12.5 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||153.1 W||302.6 W||452.4 W||600.4 W||703.4 W|
|% Max Load||21.9%||43.2%||64.6%||85.8%||100.5%|
|Room Temp.||47.0° C||46.6° C||47.6° C||49.2° C||46.8° C|
|PSU Temp.||48.6° C||48.7° C||49.2° C||50.3° C||43.2° C|
|Ripple and Noise||Pass||Pass||Pass||Pass||Pass|
|AC Power||171.2 W||334.0 W||505.2 W||684.0 W||812.0 W|
|AC Voltage||118.1 V||116.4 V||114.8 V||112.7 V||111.0 V|
The 80 Plus Gold certification promises efficiency of at least 87% under light (i.e., 20%) load, 90% under typical (i.e., 50%) load, and 87% under full (i.e., 100%) load. During our tests, the In Win Commander III 700 W was a tad below the 87% mark at full load under high temperatures. As we always point out, the tests for the 80 Plus certification are conducted at only 23° C, and efficiency decreases as temperature increases. Another explanation is that the AC voltage dropped to 111 V during our test five, and efficiency is lower at lower AC voltages.
Let’s discuss voltage regulation on the next page.