Protection Features Evaluation

The OCP triggering point at +12 V should be set lower to avoid voltage drops below 11.4 V. The minor rails also have higher OCP triggering points than required, but this is not a problem for their voltage levels.

Over-power protection is configured correctly at close to 121% of the PSU's maximum-rated capacity. OTP is present, but quite aggressively set because it activates once the secondary heat sink reaches 96 °C.

DC Power Sequencing

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



The 3.3 V rail is equal to or lower than the other two, which is in line with the ATX specification.

EMC Pre-Compliance Testing – Average and 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.



With the Average detector, a single spur is a little higher than the limit.