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

By: Steven Bassiri | Socket AM4 in Motherboards | Posted: Feb 9, 2018 4:00 pm
TweakTown Rating: 95%Manufacturer: MSI

Circuit Analysis

 

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

 

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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.

 

 

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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.

 

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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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