Apexgaming AG-850M PSU Review
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Ripple Measurements
To learn how we measure ripple, please click here.
The following table includes the ripple levels we measured on the AG-850M’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 | 8.2mV | 11.7mV | 13.8mV | 26.9mV | Pass |
| 20% Load | 14.0mV | 14.0mV | 15.9mV | 35.4mV | Pass |
| 30% Load | 17.1mV | 14.9mV | 17.7mV | 35.4mV | Pass |
| 40% Load | 18.6mV | 16.5mV | 18.4mV | 38.1mV | Pass |
| 50% Load | 21.5mV | 17.6mV | 20.7mV | 51.7mV | Fail |
| 60% Load | 23.0mV | 19.0mV | 22.0mV | 51.2mV | Fail |
| 70% Load | 25.0mV | 20.4mV | 23.7mV | 60.2mV | Fail |
| 80% Load | 26.7mV | 22.4mV | 25.5mV | 68.5mV | Fail |
| 90% Load | 30.7mV | 24.1mV | 26.9mV | 66.0mV | Fail |
| 100% Load | 37.3mV | 28.7mV | 31.7mV | 70.1mV | Fail |
| 110% Load | 38.7mV | 28.9mV | 31.8mV | 74.6mV | Fail |
| Cross-Load 1 | 15.0mV | 31.4mV | 28.7mV | 41.6mV | Pass |
| Cross-Load 2 | 37.0mV | 24.5mV | 27.8mV | 76.8mV | Fail |
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The first sample we tested had a problem with its 5VSB rail, where ripple was clearly out of control. Since we had a second sample at our disposal, we tested its ripple and measured significantly better performance. The following table shows the second AG-850M sample's ripple results.
| Test | 12V | 5V | 3.3V | 5VSB | Pass/Fail |
|---|---|---|---|---|---|
| 10% Load | 8.5mV | 13.2mV | 12.9mV | 5.6mV | Pass |
| 20% Load | 16.1mV | 15.6mV | 15.4mV | 5.8mV | Pass |
| 30% Load | 21.4mV | 17.0mV | 17.6mV | 6.5mV | Pass |
| 40% Load | 25.7mV | 18.3mV | 19.3mV | 7.4mV | Pass |
| 50% Load | 26.6mV | 20.5mV | 21.0mV | 8.9mV | Pass |
| 60% Load | 30.4mV | 22.1mV | 23.0mV | 9.9mV | Pass |
| 70% Load | 36.4mV | 23.9mV | 25.7mV | 10.6mV | Pass |
| 80% Load | 39.2mV | 26.7mV | 29.2mV | 11.8mV | Pass |
| 90% Load | 43.1mV | 28.7mV | 31.0mV | 13.2mV | Pass |
| 100% Load | 53.5mV | 32.7mV | 36.3mV | 17.5mV | Pass |
| 110% Load | 56.6mV | 34.4mV | 37.0mV | 17.8mV | Pass |
| Cross-Load 1 | 16.1mV | 30.0mV | 30.8mV | 12.0mV | Pass |
| Cross-Load 2 | 50.4mV | 25.7mV | 29.1mV | 16.2mV | Pass |
The second sample fares much better in our 5VSB measurements. But that's not the case for all rails, particularly the always-critical +12V one.
Ripple Oscilloscope Screenshots
The following oscilloscope screenshots illustrate the AC ripple and noise registered on the main rails (+12V, 5V, 3.3V and 5VSB). We usually set 0.01 V/Div (each vertical division/box equals 0.01V), but in some cases we use a smaller setting as well, if the registered ripple is very low.
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, covering PSUs.
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logainofhades Hopefully they will take what was criticized for this unit, and learn from it, to make an even better product down the line. Some more competition in PSU land would be nice.Reply