Antec VP550F 550 W Review

Name: Antec VP550F 550 W
Brand: Antec

crmaris

on Jun 24th, 2013,

in Power Supplies.

Manufacturer: Antec

Performance Rating & Performance per Dollar »

Ripple Measurements

You will see the ripple levels that we measured on the main rails of the VP550F in the following table. The limits are, according to the ATX specification, 120 mV (+12V) and 50 mV (5V, 3.3V, and 5VSB).

Ripple Measurements Antec VP550F
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	18.3 mV	17.3 mV	19.9 mV	9.3 mV	Pass
40% Load	22.1 mV	19.1 mV	23.0 mV	11.7 mV	Pass
50% Load	24.6 mV	18.5 mV	20.7 mV	13.0 mV	Pass
60% Load	28.7 mV	18.5 mV	20.2 mV	21.6 mV	Pass
80% Load	41.2 mV	19.4 mV	22.4 mV	34.4 mV	Pass
100% Load	52.4 mV	21.1 mV	24.4 mV	49.7 mV	Pass
Crossload 1	36.4 mV	106.4 mV	41.1 mV	10.4 mV	Fail
Crossload 2	133.1 mV	66.9 mV	54.3 mV	81.1 mV	Fail

Ripple on the 5VSB rail was way too high during the full load test. The combination of a high operating temperature and a full load are the main causes. The other rails had very good ripple results during normal load tests, especially for a budget unit. However, all hell broke lose during both cross-load tests. While the CL1 test had the 5V rail clearly out of spec the whole time, some random spikes showed up on all rails during the CL2 test, not allowing the unit to keep its ripple within the specified limits.

Ripple at Full Load

In the following oscilloscope screenshots, you can see the AC ripple and noise that the main rails registered (+12V, 5V, 3.3V, and 5VSB). The bigger the fluctuations on the oscilloscope's screen, the bigger the ripple / noise. For all measurements, we set 0.01 V / Div (each vertical division / box equals 0.01 V) as standard.