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Switching Power Supplies A to Z
Switching Power Supplies A to Z, by Sanjaya Maniktala (Newnes), starting at $94.17
Home » Power
Antec CP-850 Power Supply Review
Author: Gabriel Torres
Type: Reviews Last Updated: June 15, 2009
Page: 8 of 10
Real-time pricing for Antec CP-850.
Antec CP-850 850 Watt CPX Power Supply Unit for Twelve Hundred V3 P183-V3 P193-V3 and DF-85 NAS-B001RTPLWK Electronics Usually ships in 24 hours
Amazon: $119.99 Newegg: $119.99
Buy.com: $124.49 A Matter of Fax: $152.52

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.



As mentioned, we discovered that OCP was set at 25 A as we couldn’t pull more than that from +12V2.

Since we were already pulling the maximum we could using our equipment (33 A from its +12V1 input and 25 A from its +12V2 input), the only option for us to overload this power supply was to increase current at +5 V and +3.3 V.

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 and when we tried to pull far more than it could deliver it would shut down, so this unit passed on this test.

Input

Maximum

+12V1

33 A (396 W)

+12V2

25 A (300 W)

+5V

30 A (150 W)

+3.3 V

24 A (79.2 W)

+5VSB

3 A (15 W)

-12 V

0.5 A (6 W)

Total

937.5 W

% Max Load

110.3%

Room Temp.

48.9º C

PSU Temp.

48.7º C

AC Power (1)

1,189 W

Efficiency (1)

78.8%

AC Power (2)1,232 W
Efficiency (2)76.1%
AC Voltage102.1 V
Power Factor0.997

Consider the results marked as "2", as they are the correct ones, measured with our precision power meter.

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