Protection Features Evaluation

The high OCP triggering points on the minor rails don't seem to create any problems with load regulation and ripple suppression. Other significant downsides are the lack of surge and inrush current protection, which are usually implemented through an MOV and an NTC thermistor, with the latter being supported by an electromagnetic relay.

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 (power-up and normal 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.