VRM Overview

The 14+2+1 power phase design has been similar all the way back to this board's X670E predecessor, but we do have different MOSFETs being used here. The peak temperature only topped 65 °C on one of four channels on our data logger after 30 minutes of our Ryzen 9 9950X under full load at stock speed with all staying under 60 °C after 10 minutes at full load.


The heatsinks are basic, but clearly did a good job in our worst case scenario with minimal to no airflow on our open test bench, and their finned design will benefit from any airflow in a case too.


Monolithic Power Systems MPS2516 MP87670 power stages are used here, while we saw MPS2433 with the MSI MAG B850 Tomahawk Max Wi-Fi and previous non-Max version of the X870E Tomahawk. These are rated at 80 A and also power SOC, while a single Alpha & Omega Semiconductor power phase is used for MISC.


We have two different manufacturers making up the pair of PWM controllers, with a Monolithic Power Systems MPS2509 and also a Richtek RT3672EE.