Protection Features Evaluation

OCP is set high at +12 V, and the same goes for the minor rails. I can understand high loads at 5 V because of ARGB lighting, but there is no reason for such high loads at 3.3 V. Moreover, OPP is also set high to cope with high power spikes.

I encountered a severe problem with over-temperature protection. I evaluated two samples. Both shut down during OTP evaluation but wouldn't start after having done so. This is a big issue in my book because OTP didn't protect the PSU. If I had a problem with one sample, I could say it is a one-off, but two samples in a row dying during the OTP evaluation is indicative of a problem.

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. We turn the unit off for our first measurement 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.

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.


The high spurs with the Peak EMI detector at 957 and 965 kHz are worrisome.