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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 well. During this test, voltages were still within 3% of their nominal values, except at +12VA (+11.53 V) and +12VB (+11.51 V), which were still inside the proper range, though. Ripple and noise levels increased, but were still relatively low (69.2 mV at +12VA, 70.8 mV at +12VB, 21.2 mV at +5 V, and 19.4 mV at +3.3 V).

Input Overload Test
+12VA 25 A (300 W)
+12VB 25 A (300 W)
+5 V 8 A (40 W)
+3.3 V 8 A (26.4 W)
+5VSB 3 A (15 W)
-12 V 0.5 A (6 W)
Total 662.4 W
% Max Load 120.4%
Room Temp. 47.8° C
PSU Temp. 54.8° C
AC Power 937 W
Efficiency 79.1%
AC Voltage 111.8 V
Power Factor 0.995
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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.