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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




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




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.





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.




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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