VRM Overview

The 16+2+2 phase power delivery system is cooled by two large separate heatsinks and even after our 10-minute stress test where our EPS12V meter measured a peak of 225 W, the temperature recorded by our data logger failed to top 50°C with our Ryzen 9 9950X, one of the lowest readings we've seen.


The left heatsink is enormous and doesn't just cool the MOSFETs and chokes, but the 10 Gbps Ethernet controller and USB4 controller too. Thankfully it seems to have plenty of headroom given the VRMs didn't top 50°C after 10 minutes of full load. The top heatsink just deals with the VRMs and like its counterpart has a row of fins cut into the aluminium slab to boost surface area.


The 16 vCore phases and two SOC phases are all Monolithic Power Systems MP86670 80 A while the two MISC stages are Alpha & Omega Semiconductor 80 A stages. It's a very similar setup to other ASUS X870 and X870E motherboards.


Meanwhile, the MISC phases are handled by a Richtek RT3672EE controller and the other 18 phases for vCore and SOC via a Digi+ branded Infineon ASP2206, both located on the rear of the PCB.