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ASROCK X399M TAICHI (AMD X399) Motherboard Review

By Steven Bassiri from Feb 27, 2018 @ 22:00 CST
TweakTown Rating: 94%Manufacturer: AMD

Circuit Analysis

 

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The X399M TAICHI reveals its secrets with the heat sinks removed.

 

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ASROCK is using an 8-phase VRM for the main core voltage with 60A inductors. The SoC VRM is three phases with the same 60A inductors.

 

 

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The CPU core VRM uses an International Rectifier IR35201 digital PWM controller in 8+0 phase mode, and each phase uses an IR3555 60A fully integrated PowIRstage. The SoC VRM uses the same PWM controller, but in 3+0 phase mode, and it uses three of the same IR3555 we saw on the main core voltage VRM.

 

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Each set of four DIMMs gets its own two-phase memory VRM that uses a UPI Semiconductor UP1674P PWM controller and two Sinopower SM7341EH dual N-channel MOSFETs rated around 25A each.

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