XPG Core Reactor 650W Power Supply Review

Protection Features

Check out our PSUs 101 article to learn more about PSU protection features.

The OCP at +12V and the OPP are correctly set. The minor rails have much higher, than required OCP triggering points, though. This doesn't affect their performance at normal temperatures, at least. 

DC Power Sequencing

According to Intel’s most recent Power Supply Design Guide (revision 1.4), the +12V and 5V outputs must be equal to or greater than the 3.3V rail at all times. Unfortunately, Intel doesn't mention why it is so important to always keep the 3.3V rail's voltage lower than the levels of the other two outputs.

The DC power sequencing is fine, since the 3.3V rail is lower than the other two, in all cases. 

Cross Load Tests

To generate the following charts, we set our loaders to auto mode through custom-made software before trying more than 25,000 possible load combinations with the +12V, 5V, and 3.3V rails. The deviations in each of the charts below are calculated by taking the nominal values of the rails (12V, 5V, and 3.3V) as point zero. The ambient temperature during testing was between 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit).

Load Regulation Charts

Efficiency Chart

Ripple Charts

The lower the power supply's ripple, the more stable the system will be and less stress will be applied to its components.

Infrared Images

We apply a half-load for 10 minutes with the PSU's top cover and cooling fan removed before taking photos with a modified FLIR E4 camera able to deliver an IR resolution of 320x240 (76,800 pixels).

The hottest part is the PCB that hosts the DC-DC converters. Still, its hot spot doesn't go notably above 70 degrees Celsius. 

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