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Overload Tests

Below you can see the maximum we could pull from this power supply. We couldn’t pull more than that because the power supply shut down, showing that its protections were working just fine. However, after a few minutes working with this configuration, the power supply burned. The component that burned was one of the +12 V rectifiers. During this test the noise levels at the +12 V outputs were above the maximum allowed (175.4 mV at +12VA and 375.4 mV at +12VB).

Input Overload Test
+12VA 26 A (312 W)
+12VB 26 A (312 W)
+5 V 12 A (60 W)
+3.3 V 12 A (39.6 W)
+5VSB 3 A (15 W)
-12 V 0.5 A (6 W)
Total 710.4 W
% Max Load 118.4%
Room Temp. 48.3° C
PSU Temp. 52.3° C
AC Power 938 W
Efficiency 75.7%
AC Voltage 111.7 V
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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.