Fractal Design EDISON M Series 650 W Review 11

Fractal Design EDISON M Series 650 W Review

Performance Rating, Performance per Dollar, Noise & Efficiency Rating »

Ripple Measurements

You will see the ripple levels we measured on the Edison M-650's rails of 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 - Fractal Design Edison M-650
Test12 V5 V3.3 V5VSBPass/Fail
10% Load7.9 mV4.2 mV9.3 mV6.3 mVPass
20% Load9.7 mV5.6 mV9.5 mV7.5 mVPass
30% Load11.5 mV5.7 mV9.2 mV8.4 mVPass
40% Load13.5 mV7.1 mV10.3 mV9.2 mVPass
50% Load17.5 mV6.5 mV10.6 mV10.3 mVPass
60% Load20.8 mV5.0 mV10.1 mV10.8 mVPass
70% Load25.0 mV5.5 mV10.8 mV12.0 mVPass
80% Load28.6 mV6.0 mV10.2 mV13.1 mVPass
90% Load31.1 mV11.3 mV11.8 mV13.9 mVPass
100% Load35.1 mV34.6 mV19.4 mV15.2 mVPass
110% Load47.1 mV42.6 mV20.4 mV17.2 mVPass
Crossload 19.5 mV6.0 mV11.3 mV11.1 mVPass
Crossload 234.5 mV40.3 mV11.1 mV14.4 mVPass
Ripple suppression was good overall; however, during the full load and overload tests, we noticed a sudden increase in ripple on the 5V rail, which cost the unit performance points. It was probably in part due to the increased temperatures we conduct our tests in as such a weird ripple waveform is usually due to a switching problem that occurs at high temperatures. These issues also apply to the 3.3V and 12V rails, but to a much smaller degree. We strongly advice Seasonic's engineers to take a look into this matter and fix it as it is a shame for such a good platform to lose performance points because of ripple suppression, an area Seasonic products usually excel in.

Ripple at Full Load

You can see the AC ripple and noise the main rails registered (+12V, 5V, 3.3V, and 5VSB) in the following oscilloscope screenshots. 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 0.01 V) as the standard for all measurements.



Ripple at 110% Load



Ripple at Crossload 1



Ripple at Crossload 2

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Dec 9th, 2024 11:19 EST change timezone

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