Protection Features Evaluation

OCP at +12 V is properly set, and the same goes for the 5 V rail. At 3.3 V, I now see why the unit failed the CL3 test. OCP is set below 100%, which is fine because 21.6 A is way too much for this rail. OPP is conservatively set, which is a good choice, while the lack of OTP is a bummer. Every power supply has to have over temperature protection.

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 lower than the other two rails, so everything is fine here.

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 is too high.


Conducted EMI emissions are low.