Protection Features Evaluation

All rails but +12 V have high OCP triggering points, but OPP is reasonably set. What troubled me is the over temperature protection—I couldn't force the PSU to shut down even with temperatures exceeding 200°C on the +12 V heat sinks. Either there is no OTP or it is set so high it is practically useless.

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.



The 3.3 V rail is always at a lower voltage than the other two 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.


EMI emissions are low. The PSU's EMI filter does a good job.