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MSI B350M Gaming Pro (AMD B350) Motherboard Review (Page 3)

By Steven Bassiri from Mar 9, 2018 @ 10:00 CST
TweakTown Rating: 91%Manufacturer: MSI

Circuit Analysis

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The B350M Gaming Pro reveals some interesting things when we remove the heat sinks.

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The VRM is in a 3+2 phase configuration controlled by a Richtek RT8894A PWM specifically designed for AMD systems. The PWM controller has three integrated drivers that are being used to drive each of the three CPU core voltage phases.

Each power stage uses two high-side MOSFETs and two low-side MOSFETs. NIKOS PK616 and PK632 MOSFETs are used. Two Richtek drivers labeled "4P=" are found on the motherboard, and they drive the SoC voltage.

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The memory VRM is controlled by a Richtek PWM controller with integrated driver, and it's labeled "24=". The 4H you see on the SoC drivers and memory PWM controller refers to the batch number. The single memory phase uses the same MOSFET configuration as the CPU VRM.

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