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ASUS ROG STRIX Z270I Gaming Mini-ITX Motherboard Review

By: Steven Bassiri | Socket LGA 1150/1151 in Motherboards | Posted: Mar 22, 2017 1:22 pm
TweakTown Rating: 92%Manufacturer: ASUS

Circuit Analysis

 

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The STRIX Z270I Gaming has a lot to show with its heat sinks removed.

 

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The VRM on this motherboard is a 6+2 phase VRM for the CPU VCore and iGPU. The PWM is an unknown, labeled ASP1400, it seems to output 6 phases for the CPU, but I am unsure if it controls the iGPU phases as well because there are a few PWM controllers on the backside the VRM. It also seems to have two integrated drivers.

 

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Two Richtek RT8125 single phase PWMs labeled "6X=" control minor rails, and perhaps the iGPU phases. Six drivers on the backside of the VRM help control the CPU phases. They seem to be Richtek parts.

 

Each of the CPU VCore, iGPU, and some minor rails use On Semiconductor PowerPhase Dual N-Channel MOSFETs that integrated the high-side and low-side MOSFETs into a single package. They should be able to output 20A, which is more than enough for Kaby Lake in a six phase configuration. Capacitors are 10K FP Caps from Japan.

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