Ripple Measurements
You will see the ripple levels we measured on the main rails of the Vector P700 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 - Xigmatek Vector P700 |
---|
Test | 12 V | 5 V | 3.3 V | 5VSB | Pass/Fail |
---|
20% Load | 18.1 mV | 8.8 mV | 14.5 mV | 11.6 mV | Pass |
---|
40% Load | 36.6 mV | 10.3 mV | 16.9 mV | 13.7 mV | Pass |
---|
50% Load | 35.3 mV | 10.7 mV | 18.0 mV | 17.4 mV | Pass |
---|
60% Load | 37.9 mV | 11.2 mV | 19.0 mV | 13.5 mV | Pass |
---|
80% Load | 41.4 mV | 12.8 mV | 22.5 mV | 15.5 mV | Pass |
---|
100% Load | 51.6 mV | 13.6 mV | 26.8 mV | 17.9 mV | Pass |
---|
110% Load | 56.0 mV | 14.6 mV | 25.0 mV | 18.8 mV | Pass |
---|
Crossload 1 | 22.9 mV | 9.7 mV | 14.8 mV | 11.6 mV | Pass |
---|
Crossload 2 | 50.1 mV | 14.1 mV | 28.3 mV | 18.2 mV | Pass |
---|
Ripple suppression on the 5V and 5VSB rails was very good, good enough on 3.3V, and satisfactory at +12V, although we want to see ripple below 40 mV on the +12V rail, especially on high-end units like this one. We aren't going to complain a lot about the nearly 52 mV this unit registered under such tough conditions.
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