Protection Features Evaluation

The OCP triggering points are set correctly on the minor rails, but slightly higher than usual at +12 V. The same goes for OPP, which is set high at 138%. I would be more confident with an OPP triggering point within 130%. All other protection features operate as expected.

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 or greater than the +3.3 V rail's output at all times, during the power-up and normal operation. For our first measurement, we turn the unit off and switch it back on without any load in any of the rails.



The 3.3 V rail is always lower than the other two, which is as it should be according to the ATX specification.

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.



EMI noise is high at low frequencies (150–267 kHz).