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Biostar X470GTN Gaming (AMD X470) Motherboard Review (Page 3)

By Steven Bassiri from Jul 18, 2018 @ 10:00 CDT
TweakTown Rating: 90%Manufacturer: AMD

Circuit Analysis

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Removing the heat sinks doesn't really reveal too much, since most of the motherboard is already revealed.

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The VRM is in a 4+3 phase configuration. It's controlled by an Intersil ISL95712 PWM which offers 4+3 phase operation with integrated drivers. It offers two integrated drivers on the four-phase rail and one on the three-phase rail. To drive the rest of the phases, Biostar uses three ISL6625A drivers, which are labeled "5AZ". Each phase uses a dual N-Channel MOSFET so that you won't see discrete high-side and low-side MOSFETs; instead, you get a single package. The Nikos (UNKIC) PK612DZ are the dual N-Channel MOSFETs, they are rated for roughly 50A.

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Two Sinopower N-Channel MOSFETs are controlled by a single phase Richtek PWM with an integrated driver, providing enough power for two memory DIMMs.

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