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Ripple and Noise Tests

Voltages at the power supply outputs must be as “clean” as possible, with no noise or oscillation (also known as “ripple”). The maximum ripple and noise levels allowed  are 120 mV for +12 V and -12 V outputs, and 50 mV for +5 V, +3.3 V and +5VSB outputs. All values are peak-to-peak figures. We consider a power supply as being top-notch if it can produce half or less of the maximum allowed ripple and noise levels.

The In Win Commander III 700 W provided low ripple and noise levels, although a little bit higher than we’d like to see to consider this unit as “flawless” on this test.

Input Test 1 Test 2 Test 3 Test 4 Test 5
+12VA 28.8 mV 38.4 mV 45.8 mV 58.4 mV 68.4 mV
+12VB 30.2 mV 36.4 mV 45.4 mV 58.0 mV 68.4 mV
+5 V 19.8 mV 18.4 mV 17.2 mV 17.2 mV 18.4 mV
+3.3 V 18.4 mV 16.4 mV 16.2 mV 19.6 mV 34.4 mV
+5VSB 13.0 mV 13.2 mV 16.2 mV 18.6 mV 18.6 mV
-12 V 32.8 mV 36.8 mV 36.8 mV 42.6 mV 50.4 mV

Below you can see the waveforms of the outputs during test five.

In Win Commander III 700wFigure 25: +12VA input from load tester during test five at 703.4 W (68.4 mV)

In Win Commander III 700wFigure 26: +12VB input from load tester during test five at 703.4 W (68.4 mV)

In Win Commander III 700wFigure 27: +5V rail during test five at 703.4 W (18.4 mV)

In Win Commander III 700wFigure 28: +3.3 V rail during test five at 703.4 W (34.4 mV)

Let’s see if we can pull more than 700 W from this unit.

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Gabriel Torres is a Brazilian best-selling ICT expert, with 24 books published. He started his online career in 1996, when he launched Clube do Hardware, which is one of the oldest and largest websites about technology in Brazil. He created Hardware Secrets in 1999 to expand his knowledge outside his home country.