Protection Features Evaluation

My only objection here is the wrongly configured OCP on the +12V rail that allows it to drop very low. I chose not to push this rail any harder because it would have broken the PSU. The wrong OCP setting at +12V is also responsible for the lousy OPP result of close to 11 V.

DC Power Sequencing

According to Intel's most recent Power Supply Design Guide (revision 1.4), the +12V and 5V rails must have voltages equal or greater than the 3.3V rail's output at all times—during 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.

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.



There is a high spur that goes well over the corresponding limit at 158 KHz.