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ASRock Z270 Extreme4 Motherboard Review

By: Steven Bassiri | Socket LGA 1150/1151 in Motherboards | Posted: Jan 12, 2017 2:40 pm
TweakTown Rating: 91%Manufacturer: ASRock

Circuit Analysis

 

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The Z270 Extreme4's bare PCB exposes how it all works.

 

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The motherboard's VRM for the CPU is a 6+4+1+1 phase VRM. The iGPU gets four phases, and the CPU VCore gets six, both doubled from 2+3 phases through doubling of power stage components. The last 1+1 are phases for the VCCSA and VCCIO and don't work off the main PWM controller. The PWM controller is an Intersil ISL95824, which is a 4+2 phase PWM with one integrated driver on the 2 phase rail and two integrated drivers on the 4 phase rail.

 

ASRock supplements the integrated drivers with two ISL6625A drivers, one for each rail. The 3+2 drivers are each attached to two power stages consisting of NIKOS PK6188 for the high-side and PZ0903 for the low-side. While 6+4 phases might not sound like a lot, it should get the job done since LGA1151's power requirements aren't crazy high.

 

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The memory VRM consists of two phases controlled by an Anpec APW8720B single-phase PWM controller. The two phases are derived by doubling the number of power stage components on the single integrated driver, and the MOSFETs are Advanced Power Electronics Corp. AP4034GYT N-channel power MOSFETs.

 

The motherboard is much more revealing when you take off the shields and heat sinks.

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