Seasonic X-Series 850 W Power Supply Review

Overload Tests

Below you can see the maximum we could pull from this power supply. Because of its incredibly overspec’ed components, we could easily pull 1,000 W from it. In fact, we had to stop our test at 1,000 W only because this is the limit of our load tester, and this power supply may be able to deliver even more. During this extreme condition, efficiency dropped to 82.4%, but noise and ripple levels were still extremely low and voltages were still within 3% from their nominal values.

Input Overload Test
+12VA 33 A (396 W)
+12VB 33 A (396 W)
+5V 23 A (115 W)
+3.3 V 23 A (75.9 W)
+5VSB 3 A (15 W)
-12 V 0.5 A (6 W)
Total 998.4 W
% Max Load 117.5%
Room Temp. 44.8° C
PSU Temp. 55.4° C
AC Power 1,212 W
Efficiency 82.4%
AC Voltage 102.7 V
Power Factor 0.997

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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