Seasonic X-400 Fanless Power Supply Review

Hardware Secrets Golden Award

Overload Tests

Below you can see the maximum we could pull from this power supply. Because of its incredibly overspec’ed components, we could pull 600 W from it and it was still presenting extremely high efficiency (88%), with low noise and ripple levels, and voltages still within 3% from their nominal values. Impressive.

Input Overload Test
+12VA 22 A (264 W)
+12VB 22 A (264 W)
+5V 8 A (40 W)
+3.3 V 8 A (26.4 W)
+5VSB 2 A (10 W)
-12 V 0.5 A (6 W)
Total 602.2 W
% Max Load 150.6%
Room Temp. 40.2° C
PSU Temp. 48.7° C
AC Power 683.0 W
Efficiency 88.2%
AC Voltage 107.8 V
Power Factor 0.993

Author: Gabriel Torres

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.

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