Removing the heat sinks doesn't reveal too much since most of the motherboard is already revealed.
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 MOSFFETs; they are rated for roughly 50A.
Two Sinopower N-Channel MOSFETs are driven by a single phase Richtek PWM with an integrated driver, providing enough power for two memory DIMMs.
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- Page 1 [Introduction, Specifications, and Pricing]
- Page 2 [Packaging and X370GTN Gaming Overview]
- Page 3 [BIOSTAR X370GTN Gaming Circuit Analysis]
- Page 4 [BIOSTAR X370GTN Gaming Circuit Analysis Continued]
- Page 5 [BIOS and Software]
- Page 6 [Test System Setup]
- Page 7 [CPU, Memory, and System Benchmarks]
- Page 8 [System IO Benchmarks]
- Page 9 [Thermal Imaging and Power Consumption]
- Page 10 [What's Hot, What's Not & Final Thoughts]