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ASRock Fatal1ty Z370 Professional Gaming i7 (Intel Z370)

By: Steven Bassiri | Socket LGA 1150/1151 in Motherboards | Posted: Feb 3, 2018 2:00 pm
TweakTown Rating: 94%Manufacturer: ASRock

Circuit Analysis

 

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The Fatal1ty Z370 Professional Gaming i7 shows us the goods when the heat sink comes off.

 

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The VRM on the Fatal1ty Z370 Professional Gaming i7 is in an 8+4 phase configuration for the CPU core and the iGPU phases. The Intersil ISL69138 is used as the PWM controller and supports up to 7 phases on two rails (4+2 here). The main CPU rail gets four PWM channels, and the iGPU rail gets two PWM channels.

 

Each phase gets a 60A inductor and uses Sinopower SM7341EH rated around 25A each, just like NexFETs and Fairchild semiconductor dual N-Channel MOSFETs that are popular. Two APW8720 PWM controllers with integrated drivers are used for the VCCSA and VCCIO single phase VRMs that use the same dual-N channel MOSFETs as the main CPU VRM.

 

 

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Each PWM channel seems to output to two ISL6596 N-channel MOSFET drivers for the VCore and iGPU, each phase gets its own driver, but there is no doubler, so two phases will be on at one time instead of just one. The memory VRM uses a UPI uP1674P PWM controller with integrated drivers and outputs to the Sinopower SM7341EH dual N-Channel MOSFETs as used in the CPU VRM.

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