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ASRock Z390 Taichi (Intel Z390) Motherboard Preview

By: Steven Bassiri | Socket LGA 1150/1151 in Motherboards | Posted: 1 week, 5 days ago

Circuit Analysis

 

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The Fatal1ty Z390 Taichi shows us the goods with the heat sinks removed!

 

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The VRM is a large 10+2 phase VRM with the CPU and iGPU power rails using IR35201 PWM controller in 5+2 phase mode. The 10 phases are doubled up by, but not the iGPU phases. Each phase uses a 60A choke, 12K capacitors, and Texas Instruments 87350D NexFETs.

 

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The VCCSA and VCCIO are controlled by single phase Richtek RT8120, and they control Sinopower dual N-Channel SM7341EH. Six IR3598 are in doubler and dual-driver mode for the CPU phases, but one IR3598 is configured as dual driver mode, where it is fed two PWM signals from the PWM.

 

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The memory VRM uses a UPI uP1674 PWM controller and the same MOSFETs as the VCCSA/VCCIO in a two-phase configuration.

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