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GIGABYTE Z390 Designare (Intel Z390) Motherboard Preview (Page 3)

Steven Bassiri | Jan 10, 2019 at 10:00 am CST - 1 min, 5 secs reading time for this page
Rating: 92%Manufacturer: GIGABYTE

Circuit Analysis

GIGABYTE Z390 Designare (Intel Z390) Motherboard Preview 16 | TweakTown.com

The Z390 Designare shows us the goods with the heat sinks removed!

GIGABYTE Z390 Designare (Intel Z390) Motherboard Preview 17 | TweakTown.comGIGABYTE Z390 Designare (Intel Z390) Motherboard Preview 18 | TweakTown.com

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.

GIGABYTE Z390 Designare (Intel Z390) Motherboard Preview 19 | TweakTown.comGIGABYTE Z390 Designare (Intel Z390) Motherboard Preview 20 | TweakTown.com

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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Steven Bassiri

ABOUT THE AUTHOR - Steven Bassiri

Steven went from a fledgling forum reader in 2003 to one of the internet's brightest tech stars by 2010. Armed with an information systems degree, a deep understanding of circuitry, and a passion for tech, Steven (handle Sin0822) enjoys sharing his deep knowledge with others. Steven details products down to the component level to highlight seldom explained, and often misunderstood architectures. Steven is also a highly decorated overclocker with several world records.

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