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EVGA SuperNOVA 550 G2 PSU Review

EVGA introduced two new low-capacity G2 PSUs. Today, we evaluate the 550 G2 model made by Super Flower, which features 80 Plus Gold efficiency.

Ripple Measurements

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the rails of the EVGA 550 G2 unit. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V and 5VSB).

Test12V5V3.3V5VSBPass/Fail
10% Load4.7 mV5.9 mV6.1 mV5.0 mVPass
20% Load5.8 mV8.2 mV9.4 mV5.9 mVPass
30% Load6.1 mV8.4 mV10.6 mV6.3 mVPass
40% Load6.5 mV8.4 mV10.2 mV6.5 mVPass
50% Load6.5 mV8.6 mV10.4 mV7.0 mVPass
60% Load6.8 mV8.6 mV10.8 mV7.1 mVPass
70% Load6.9 mV8.7 mV11.5 mV7.3 mVPass
80% Load7.5 mV9.4 mV11.6 mV8.2 mVPass
90% Load7.7 mV9.9 mV11.8 mV9.4 mVPass
100% Load7.9 mV10.1 mV12.4 mV12.2 mVPass
110% Load8.0 mV10.3 mV12.5 mV12.4 mVPass
Cross-Load 16.1 mV8.7 mV11.5 mV10.6 mVPass
Cross-Load 27.8 mV9.7 mV11.6 mV9.8 mVPass
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All Super Flower implementations are ripple proof, and this PSU is no exception. Actually, ripple suppression on the 550 G2 is jaw dropping, with less than 10 mV at +12V, even in worst-case scenarios. And on all of the rest of the rails, ripple didn't even reach 13 mV. Ripple suppression is one of the most crucial factors for PSUs, and the SuperNOVA 550 G2 is among the best-performing PSUs money can buy today.

Ripple Oscilloscope Screenshots

The following oscilloscope screenshots illustrate the AC ripple and noise registered on the main rails (+12V, 5V, 3.3V and 5VSB) — the bigger the fluctuations on the screen, the bigger the ripple/noise. We set 0.01V/Div (each vertical division/box equals 0.01V) as the standard for all measurements.

Ripple At Full Load

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Ripple At 110 Percent Load

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Ripple At Cross-Load 1

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Ripple At Cross-Load 2

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Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.