Removing the heat sinks doesn't really 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 MOSFETs, they are rated for roughly 50A.
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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- Page 1 [Introduction, Specifications, and Pricing]
- Page 2 [Packaging and X470GTN Gaming Overview]
- Page 3 [Biostar X470GTN Gaming Circuit Analysis]
- Page 4 [Biostar X470GTN Gaming Circuit Analysis Continued]
- Page 5 [BIOS and Software]
- Page 6 [Test System Setup]
- Page 7 [Overclocking]
- Page 8 [CPU, Memory, and System Benchmarks]
- Page 9 [System IO Benchmarks]
- Page 10 [Thermal Imaging and Power Consumption]
- Page 11 [What's Hot, What's Not & Final Thoughts]