Protection Features Evaluation

OCP at +12 V is set high, and the same goes for OPP. This doesn't look to be a problem at least at normal operating temperatures since I didn't notice any load regulation or ripple suppression issues. OPP closer to 130% at high operating temperatures would be nice, however, since loads exceeding 1400 W would highly stress the PSU.

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 generally low. I only noticed a spur exceeding the limits with the average detector, but everything is fine with the peak EMI detector.