Transient Testing

For those of you that are curious as to some of the reasoning and equipment behind our PSU testing program here at The FPS Review, we have put together an introduction for you that shares a lot of the behind the scenes of the program. This program is based on what the author developed at [H]ardOCP and utilizes the equipment bequeathed to the author by Kyle Bennett. The testing we are conducting today is exactly as described in that document and will continue with our Transient Testing.

Transient Test 1

Loaded/Unloaded

12v/5v

Test #1 is equal to approximately 25% of the rated capacity of the Fractal Design ION+ 560P at 45c. This makes Test #1 equal to 148W by loading the 12v rail to 10a, the 5v rail to 2a, the 3.3v rail to 1a, the +5vsb to 2a, and the -12v to 0.3a before the addition of the transient load. The results of Test #1 show a ~250mV drop on the 12v rail and ~130mV drop on the 5v rail when each is directly loaded. At the same time that the load was being triggered on the 12v rail, the 5v rail measured a ~20mV drop.

Transient Test 2

Loaded/Unloaded

12v/5v

Test #2 is equal to approximately 50% of the rated capacity of the Fractal Design ION+ 560P at 45c. This makes Test #2 equal to 277W by loading the 12v rails to 20a, the 5v rail to 3a, the 3.3v rail to 2a, the +5vsb to 2a, and the -12v to 0.3a before the addition of the transient load. The results of Test #2 show a ~250mV drop on the 12v rail and ~65mV drop on the 5v rail when each is directly loaded. At the same time that the load was being triggered on the 12v rail, the 5v rail measured a ~65mV drop.

Transient Load Testing Summary

The Transient Load Test results for the Fractal Design ION+ 560P are good. In today’s testing, the ION+ 560P saw the loaded 12v rail post a peak change of ~250mV and the loaded 5v rail post a peak change of ~130mV. The unloaded 5v peak change during the 12v load was ~65mV. Those numbers are, in an absolute sense, excellent on the 12v rail but a bit less so on the 5v rail. This is not only because of the numbers the unit posted, but also because of this unit’s small capacity. When we look at comparable units, this unit was mixed with the BitFenix Formula Gold 550W. All in all though, these result are good overall and in a relative sense. Let’s move on now to see how this unit does in the DC Output Quality aspect of our testing!

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Paul Johnson

Paul is a long time PC hobbyist and tech enthusiast having gotten his start when he broke his first C64 quickly followed by breaking his first IBM XT. Most notably however, for 12 years, he served as the...

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