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BIOSTAR Z370GT6 Motherboard Review (Page 3)

By: Steven Bassiri from Dec 5, 2017 @ 17:08 CST
TweakTown Rating: 92%Manufacturer: BIOSTAR

Circuit Analysis


The Z370GT6 shows us the goods.


The phases we see here are split into an 8+2 phase configuration for the CPU VCore and the iGPU voltage rail. We get four phases doubled to eight through doubling the number of VRM power stage components on each driver output, and we get two true phases for the iGPU from the PWM controller. The capacitors are rated 5K hours, but we don't know the rating on the inductors.


The VRM on this motherboard uses Intersil's ISL95866 4+3 phase PWM controller. It offers four phases for the CPU VCore, and on that rail, it has two integrated driver outputs, and BIOSTAR adds two more drivers (ISL6208) for a total of four driver outputs. These dour driver outputs go to two sets of power stage components. The Sinowpower SM4364 and SM4377 MOSFETs are used as low-side and high-side MOSFETs, these are the same we found on some Z170 motherboards from BIOSTAR.

Each power stage gets ones high-side and one low-side MOSFET if we consider each power stage and individual phase by inductor count. The VCCSA uses a single phase made up of the same MOSFETs. However, some other voltage rails use Richtek RT9045 linear regulators, and we also find some voltage console chips from UPI (UP1811) to monitor system parameters.


A UPI Semiconductor uP1514 is used as the PWM controller with integrated driver for the memory VRM, which is made up of three SM4377 MOSFETs (two low sides and one high side).

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