The Z390 Designare shows us the goods with the heat sinks removed!
The VRM is a large 12+1 phase VRM consisting of 50A Vishay SiC634 DrMOS for the CPU phases and a single SiC620 60A DrMOS for the iGPU. It is controlled by an Intersil ISL69138 digital PWM controller in 6+1 phase mode, and six ISL6617 doublers are used to balance phase currents between each set of doubled phases.
The doublers are in synchronous mode, so a PWM readout would look like a large 6-phase VRM instead of a 12-phase one, so the doublers are used exclusively to balance the current between pairs of phases. The design compromise was made on these boards to improve transient response. On GIGABYTE's IR-based Z390 VRMs, the PWM readout would look like a 12-phase VRM because of IR's transient algorithms, so asynchronous mode is engaged on this board. Either way, the VRMs are very nice.
The VCCSA and VCCIO are controlled by Richtek RT8120 single phase PWMs with integrated drivers, and they control some miniature On Semiconductor PowerPAKs labeled "4C06". The memory VRM uses the same Richtek PWMs, but with larger On Semiconductor "4C06N" N-channel PowerPAKs in a two low single high configuration.
Last updated: Nov 15, 2019 at 01:16 pm CST
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- Page 1 [Introduction, Specifications, and Pricing]
- Page 2 [Packaging and Z390 Designare Overview]
- Page 3 [GIGABYTE Z390 Designare Circuit Analysis]
- Page 4 [GIGABYTE Z390 Designare 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]