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.
Why you can trust Tom's Hardware
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).
| Test | 12V | 5V | 3.3V | 5VSB | Pass/Fail |
|---|---|---|---|---|---|
| 10% Load | 4.7 mV | 5.9 mV | 6.1 mV | 5.0 mV | Pass |
| 20% Load | 5.8 mV | 8.2 mV | 9.4 mV | 5.9 mV | Pass |
| 30% Load | 6.1 mV | 8.4 mV | 10.6 mV | 6.3 mV | Pass |
| 40% Load | 6.5 mV | 8.4 mV | 10.2 mV | 6.5 mV | Pass |
| 50% Load | 6.5 mV | 8.6 mV | 10.4 mV | 7.0 mV | Pass |
| 60% Load | 6.8 mV | 8.6 mV | 10.8 mV | 7.1 mV | Pass |
| 70% Load | 6.9 mV | 8.7 mV | 11.5 mV | 7.3 mV | Pass |
| 80% Load | 7.5 mV | 9.4 mV | 11.6 mV | 8.2 mV | Pass |
| 90% Load | 7.7 mV | 9.9 mV | 11.8 mV | 9.4 mV | Pass |
| 100% Load | 7.9 mV | 10.1 mV | 12.4 mV | 12.2 mV | Pass |
| 110% Load | 8.0 mV | 10.3 mV | 12.5 mV | 12.4 mV | Pass |
| Cross-Load 1 | 6.1 mV | 8.7 mV | 11.5 mV | 10.6 mV | Pass |
| Cross-Load 2 | 7.8 mV | 9.7 mV | 11.6 mV | 9.8 mV | Pass |




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




Ripple At 110 Percent Load




Ripple At Cross-Load 1




Ripple At Cross-Load 2




Get Tom's Hardware's best news and in-depth reviews, straight to your inbox.
Current page: Ripple Measurements
Prev Page Transient Response Tests Next Page Performance, Performance Per Dollar And Noise Ratings
Aris Mpitziopoulos is a contributing editor at Tom's Hardware, covering PSUs.