Seasonic Platinum Series Fanless 460 W Review

Name: Seasonic Platinum Series Fanless 460 W
Brand: Seasonic

crmaris

on Mar 6th, 2013,

in Power Supplies.

Manufacturer: Seasonic

Performance Rating & Performance per Dollar »

Ripple Measurements

You will see the ripple levels that we measured on the main rails of the SS-460FL 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 Seasonic SS-460FL
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	17.6 mV	12.7 mV	11.1 mV	4.5 mV	Pass
40% Load	24.5 mV	13.5 mV	11.6 mV	4.9 mV	Pass
50% Load	27.9 mV	13.0 mV	11.6 mV	5.1 mV	Pass
60% Load	30.2 mV	14.1 mV	11.9 mV	5.7 mV	Pass
80% Load	31.5 mV	14.4 mV	12.1 mV	6.3 mV	Pass
100% Load	34.1 mV	15.2 mV	12.3 mV	7.5 mV	Pass
110% Load	36.2 mV	15.3 mV	12.3 mV	8.1 mV	Pass
Crossload 1	20.6 mV	13.8 mV	10.4 mV	32.5 mV	Pass
Crossload 2	34.1 mV	13.2 mV	11.1 mV	7.5 mV	Pass

Ripple suppression was, as expected, very good, with the +12V rail being, at worst, close to one third of the limit. The other rails even performed better. Ripple did, strangely enough, increase dramatically on 5VSB during the CL1 test, but it still stayed well below the corresponding limit. We didn't notice this issue in the SS-520FL unit that uses the same platform, so this may just be an isolated incident. It is, in any case, nothing to lose sleep over it. Seasonic has, once again, proven that ripple suppression is their specialty, and the new KM3 platform does, like the old one, offer extra-clean DC outputs.

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.