Amacrox Calmer 560: Silence is Golden

Loads

As the results will show, there was no need to try for the peak 560W since the rails already experience problems at 110% of load - around 420W. It is possible to reach 560W, but we measured only around 3V at that time on the 3.3V rail and felt it wasn't worth showing. We decided to stay with the rated 400W and just went with a 10% overload, where the fanless design already struggled.

As always, we used our Chroma ATE to apply a specific amount of load to all of the rails. The table above shows the different loads we used during testing.

DC Outputs

All of the rails start at their ideal output, which is good but doesn't leave much space for voltage drop with increasing loads. Normally we see power supplies start well above their nominal output, which leaves some wiggle room. This means that when we apply a heavy load the voltages drop dangerously close to being out of spec - and in the case of the 3.3V rail it falls out of spec above a 90% load. This is not a very good result if you actually plan on coming anywhere near the 400W rating, though the 12V and 5V rails do stay in spec even up to 10% overload. We also tried for the promised peak of 560W. Since the rails were already low, the extra load didn't help. We measured only 3V on the 3.3V rail at 560W.