Silverstone Strider Plus ST50F-P 500 W Review

Name: Silverstone Strider Plus ST50F-P 500 W
Brand: SilverStone

crmaris

on May 6th, 2011,

in Power Supplies.

Manufacturer: SilverStone

Value & Conclusion »

Ripple Measurements

In the following table you will find the ripple levels that we measured on the main rails of ST50F-P. According to ATX specification the limits are 120 mV (+12V) and 50 mV (5V & 3.3V).

Ripple Measurements
Test	12 V	5 V	3.3 V	Pass/Fail
20% Load	13.2 mV	10.2 mV	6.4 mV	Pass
40% Load	18.8 mV	12.2 mV	7.0 mV	Pass
50% Load	21.6 mV	14.2 mV	7.8 mV	Pass
60% Load	30.2 mV	17.8 mV	8.6 mV	Pass
80% Load	37.6 mV	20.6 mV	11.8 mV	Pass
100% Load	49.4 mV	25.8 mV	14.2 mV	Pass
Crossload 1	15.2 mV	16.8 mV	10.8 mV	Pass
Crossload 2	44.8 mV	23.8 mV	12.8 mV	Pass

Ripple/noise suppression in general terms is fairly good. The best performer was 3.3V with 14.2 mV ripple at worst case. The +12V rail follows and 5V comes in the last place with maximum ripple reaching the middle of the limit.

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). The bigger the fluctuations on the oscilloscope's screen the bigger the ripple/noise. We set 0.01 V/Div (each vertical division/box equals to 0.01V) as standard but sometimes we are forced to use 0.02 V/Div, meaning that the fluctuations will look smaller but actually this wont be the case.