The Z390 Gaming Edge AC shows us the goods with the heat sinks removed!
The VRM is a 10+1 phase VRM which is achieved by doubling the number of power stage components on each of the four drivers for the CPU. The UPI uP9521 is a 4+3 phase PWM controller, but it's somehow in a 5+1 phase mode, as there is only one iGPU phase and five CPU VCore phases.
We faced the same mystery on MSI's Z370 motherboards, so perhaps this is a different version of the PWM, or it can reallocate PWM channels. The iGPU phase is in a two-low one high MOSFET configuration.
The drivers for the CPU VCore phases are located on the rear of the motherboard. The memory VRM uses an RT8125 ("8Y=") PWM controller with three On Semi. 4C024N MOSFETs in a two-low one high configuration.
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- Page 1 [Introduction, Specifications, and Pricing]
- Page 2 [Packaging and Z390 Gaming Edge AC Overview]
- Page 3 [MSI Z390 Gaming Edge AC Circuit Analysis]
- Page 4 [MSI Z390 Gaming Edge AC 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]
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