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BIOSTAR Z270GTN Mini-ITX Motherboard Review

By: Steven Bassiri | Socket LGA 1150/1151 in Motherboards | Posted: May 2, 2017 3:55 pm
TweakTown Rating: 89%Manufacturer: BIOSTAR

Circuit Analysis

 

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The Z270GTN reveals its VRMs and PCH when the heat sinks are removed.

 

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The VRM on this motherboard for the CPU uses PowerPAK MOSFETs. There are four phases for the CPU Core, two for the iGPU, and another for the VCCSA.

 

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The CPU and iGPU use an Intersil ISL95866 hybrid-digital PWM designed for integrated systems. The PWM offers 4+3 phase operation, Biostar is using it in 4+2 phase mode. The larger rail gets two integrated drivers, while the smaller rail gets a single. The main CPU rail gets two ISL6608 drivers, resulting in a true 4-phase VRM. Sinopower SM4377 and SM4363A MOSFETs are used.

 

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The VCCSA uses an Anpec APW7120 PWM with an integrated driver to drive a single-phase that uses Sinopower SM4377 for both the high-side and low-side MOSFETs. The memory VRM is located below the memory DIMMs and uses a mixture of switching and linear regulation.

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