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Home » Power
Corsair HX750W Power Supply Review
Author: Gabriel Torres 192,987 views
Type: Reviews Last Updated: July 29, 2009
Page: 8 of 10
Overload Tests
Hardware Secrets Golden Award

Before overloading power supplies we always test first if the over current protection (OCP) circuit is active and at what level it is configured.



Here we were limited by our load tester, which can pull “only” up to 33 A from each one of its +12 V inputs, giving us a total of 66 A.

The idea behind of overload tests is to see if the power supply will burn/explode and see if the protections from the power supply are working correctly. This power supply didn’t burn or explode and it shut down when we tried to overload it.

Below you can see the maximum we could pull from this power supply with it still working within specs. Even under this overloading efficiency was above 83%. As you can see Corsair could have labeled this unit as a 900 W power supply, but they didn’t do this because otherwise they wouldn’t be able to get the 80 Plus Gold certification.

Input

Maximum

+12V1

32 A (384 W)

+12V2

32 A (384 W)

+5V

15 A (75 W)

+3.3 V

15 A (49.5 W)

+5VSB

3 A (15 W)

-12 V

0.5 A (6 W)

Total

912.9 W

% Max Load

121.7%

Room Temp.

46.2° C

PSU Temp.

51.1° C

AC Power

1,099 W

Efficiency

83.1%

AC Voltage

100.5 V

Power Factor

0.998

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