FSP Aurum Xilenser 500 W Review

Name: FSP Aurum Xilenser 500 W
Brand: FSP

crmaris

on Jun 21st, 2012,

in Power Supplies.

Manufacturer: FSP

Performance Rating & Performance per Dollar »

Ripple Measurements

In the following table you will find the ripple levels that we measured on the main rails of AU-500FL. According to ATX specification the limits are 120 mV (+12V) and 50 mV (5V, 3.3V and 5VSB).

Ripple Measurements FSP AU-500FL
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	44.4 mV	16.6 mV	11.2 mV	10.8 mV	Pass
40% Load	31.2 mV	23.0 mV	12.3 mV	14.7 mV	Pass
50% Load	33.8 mV	24.2 mV	12.6 mV	18.5 mV	Pass
60% Load	38.2 mV	26.3 mV	14.0 mV	20.0 mV	Pass
80% Load	38.9 mV	35.6 mV	15.0 mV	21.0 mV	Pass
100% Load	39.3 mV	37.7 mV	16.6 mV	29.9 mV	Pass
Crossload 1	39.4 mV	20.2 mV	30.4 mV	11.8 mV	Pass
Crossload 2	37.3 mV	37.9 mV	16.1 mV	15.5 mV	Pass

Ripple suppression is not among the strong points of this unit, although near 40mV at +12V is not a high reading. The problem lies mainly with the 5V rail which registered close to 38mV ripple during the full load test. This reading is not even close to what we expect to see at this rail from a PSU of the higher-end class. FSP should take a look again at the 5V VRM and try to lower ripple to levels near to the ones that the competition achieves (Seasonic, Super Flower). There is also a possibility that we hit on a bad sample.

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 to 0.01V) as standard.