Protection Features Evaluation

The protection features are generally correctly configured. I don't have a problem with the OPP triggering point above 130% or the +12 V rail's OCP because the PSU uses parts that can withstand such high loads. However, someone could argue that there is no reason for such high triggering points (at +12 V and OPP) in a PSU with 1 kW maximum power output.

DC Power Sequencing

According to Intel's most recent Power Supply Design Guide (revision 1.4), the +12 V and +5 V rails must have voltages equal to or greater than the +3.3 V rail's output at all times. For our first measurement, we turn the unit off and switch it back on without a load on any of the rails.



Besides the nasty step at +12 V, there is nothing to worry about here because the 3.3 V rail is always below the other two.

EMC Pre-Compliance Testing - Average and Quasi-Peak EMI Detector Results

Electromagnetic Compatibility (EMC) is the ability of a device to operate properly in its environment without disrupting the proper operation of other close-by devices.

Electromagnetic Interference (EMI) stands for the electromagnetic energy a device emits, and it can cause problems in other close-by devices if too high.



The AVG EMI detector shows some spurs that exceed the limits, which is not the case with the QP detector that is more accurate.