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MSI X399 GAMING PRO CARBON AC (AMD X399) Motherboard Review

By Steven Bassiri from Feb 9, 2018 @ 10:00 CST
TweakTown Rating: 95%Manufacturer: MSI

Circuit Analysis




The X399 GAMING PRO CARBON AC shows off its goods with all heat sinks and shields removed.




MSI is using a 10-phase VRM for the CPU VDD (Voltage Drain Drain rather than Voltage Collector Collector, we generally call it VCore in this context). The fully digital IR35201 PWM controller outputs 5 phases to doublers that then output two power stages. The power stages are International Rectifiers IR3555, and they are fully integrated 60A power stages. I am not sure on the specifications of the inductors.





PWM phase doublers are located on the underside of the PCB; they are IR3599 operating in doubler mode. The tantalum capacitors are on the back of the PCB, and the doublers and capacitors are covered by a metal heat sink. The SoC VRM is made up of three IR3555 60A PowIRstages, and they are controlled by an IR35204 digital PWM controller.




Memory VRMs for each of the four DIMMs use a Primarion digital PWM controller, the PV4210. The power stages are made up of two phases of Texas Instruments CSD87350Q NexFET dual N-channel 40A MOSFETs.

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