Why you can trust Tom's Hardware Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.
Ripple Measurements
Ripple Measurements
To learn how we measure ripple, please click here.
The following table includes the ripple levels we measured on the Edison M 750's rails. The limits are, according to the ATX specifications, 120mV (+12V) and 50mV (5V, 3.3V and 5VSB).
| Test | 12V (mV) | 5V (mV) | 3.3V (mV) | 5VSB (mV) | Pass/Fail |
|---|---|---|---|---|---|
| 10% Load | 6.4 | 5 | 6.3 | 5.4 | Pass |
| 20% Load | 8.8 | 4.2 | 6.4 | 6.6 | Pass |
| 30% Load | 10.8 | 5 | 6.7 | 7.6 | Pass |
| 40% Load | 13.2 | 5 | 9.6 | 8.2 | Pass |
| 50% Load | 15 | 5.6 | 10 | 9.4 | Pass |
| 60% Load | 19.1 | 5.5 | 12.3 | 10.2 | Pass |
| 70% Load | 22.5 | 11.8 | 12.7 | 11.8 | Pass |
| 80% Load | 25.7 | 35.8 | 14.2 | 12.4 | Pass |
| 90% Load | 29.9 | 34.9 | 17 | 13.9 | Pass |
| 100% Load | 34.6 | 37.6 | 19.1 | 15.2 | Pass |
| 110% Load | 40.1 | 40.7 | 19.3 | 16.2 | Pass |
| Crossload 1 | 7.7 | 5.4 | 7.4 | 11.1 | Pass |
| Crossload 2 | 33.1 | 34 | 14.2 | 14 | Pass |
Ripple suppression on all rails (except for 5V) is very good overall. On the 5V rail, we noticed a sudden increase in ripple with 80-percent load and up. Incidentally, this was also the case with the Edison M 650W that we tested previously. We would advise Seasonic to look at the DC-DC converter that generates the 5V rail to find the source of this sudden increase at higher loads. It might not be a serious problem that could affect your system’s stability, since ripple on this rail is still lower than the ATX limit. But it's still a shame to see performance loss over this matter.
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
Microsoft only planned for 200,000 users for Flight Simulator launch, admits drastic underestimate led to database being overwhelmed
D-Link has another security flaw with older equipment that won't be repaired — D-Link told users to replace outdated NAS last week
Stalker 2 PC performance testing and settings analysis — another demanding game that uses frame generation and upscaling as a crutch
