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ASUS Zenith Extreme Alpha (AMD X399) Motherboard Review (Page 3)

Steven Bassiri | Mar 18, 2019 at 10:00 am CDT - 0 mins, 46 secs reading time for this page
Rating: 95%Manufacturer: ASUS

Circuit Analysis

ASUS Zenith Extreme Alpha (AMD X399) Motherboard Review 19 | TweakTown.com

The motherboard looks great without heat sinks.

ASUS Zenith Extreme Alpha (AMD X399) Motherboard Review 20 | TweakTown.comASUS Zenith Extreme Alpha (AMD X399) Motherboard Review 21 | TweakTown.com

The VRM here is one of the largest and most powerful we have seen on any X399 motherboard, ASUS even moved the socket down to fit in all the power stages. This 16 phase VRM is a beast, and meant for AMD's 2990WX and other high power CPUs. It is controlled by an IR35201, which is relabeled ASP1405I. There are 16 IR3555M, which are 60A PowIRstages, and no doublers are used so each power stages attaches to one PWM channel from the PWM, this improves transient response.

ASUS Zenith Extreme Alpha (AMD X399) Motherboard Review 22 | TweakTown.comASUS Zenith Extreme Alpha (AMD X399) Motherboard Review 23 | TweakTown.com

The CPU VRM gets its power from two 8-pin power connectors. The SoC rail gets its power from four IR3555 60A power stages.

ASUS Zenith Extreme Alpha (AMD X399) Motherboard Review 24 | TweakTown.comASUS Zenith Extreme Alpha (AMD X399) Motherboard Review 25 | TweakTown.com

Both memory VRMs use the smaller MOSFETs in a dual phase configuration with an ASP1103 PWM controller with integrated drivers.

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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