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
To learn how we measure ripple, please click here.
The following table includes the ripple levels we measured on the HX1000's rails. 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 | 3.6mV | 4.7mV | 5.5mV | 5.1mV | Pass |
| 20% Load | 4.5mV | 5.3mV | 6.6mV | 5.6mV | Pass |
| 30% Load | 5.2mV | 5.8mV | 7.3mV | 6.8mV | Pass |
| 40% Load | 6.2mV | 6.1mV | 7.7mV | 7.9mV | Pass |
| 50% Load | 5.7mV | 6.1mV | 8.8mV | 8.6mV | Pass |
| 60% Load | 6.1mV | 6.4mV | 9.7mV | 9.8mV | Pass |
| 70% Load | 6.8mV | 7.3mV | 10.5mV | 11.2mV | Pass |
| 80% Load | 7.9mV | 8.1mV | 12.1mV | 12.8mV | Pass |
| 90% Load | 9.3mV | 8.6mV | 13.9mV | 14.2mV | Pass |
| 100% Load | 11.9mV | 11.3mV | 16.4mV | 17.3mV | Pass |
| 110% Load | 14.4mV | 12.2mV | 17.0mV | 19.4mV | Pass |
| Cross-Load 1 | 6.8mV | 8.9mV | 10.7mV | 8.4mV | Pass |
| Cross-Load 2 | 11.3mV | 11.0mV | 15.2mV | 16.3mV | Pass |
Ripple suppression is excellent on every rail. The extra filtering caps on the cables surely help.
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 0.01 V/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
MORE: Best Power Supplies
MORE: How We Test Power Supplies
MORE: All Power Supply Content
