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ASUS ROG ZENITH EXTREME (AMD X399) Motherboard Review (Page 3)

Steven Bassiri | Sep 4, 2017 at 10:50 am CDT - 1 min, 4 secs reading time for this page
Rating: 94%Manufacturer: ASUS

Circuit Analysis

ASUS ROG ZENITH EXTREME (AMD X399) Motherboard Review 23 | TweakTown.com

The ROG ZENITH EXTREME is one of the most loaded X399 motherboards, circuit wise.

ASUS ROG ZENITH EXTREME (AMD X399) Motherboard Review 24 | TweakTown.comASUS ROG ZENITH EXTREME (AMD X399) Motherboard Review 25 | TweakTown.com

We get a true 8-phase VRM that uses 8 PWM channels directly from an ASP1405 PWM, which is similar to an IR35201. The same digital PWM was used on ASUS's high-end Z270 and X299 motherboards. There is also a gold contact switch that will let the system know you have installed the custom water block (which has its own header) or have removed the VRM heat sink (it does one of the two). Each phase uses a 60A IR 3555M PowIRstage, MicroFine Alloy chokes, tantalum POSCAPs, and 10K capacitors.

ASUS ROG ZENITH EXTREME (AMD X399) Motherboard Review 26 | TweakTown.comASUS ROG ZENITH EXTREME (AMD X399) Motherboard Review 27 | TweakTown.com

The SoC rail uses another ASP1405 as the digital PWM controller along with three phases that use Texas Instruments CSD97374Q4M NexFETs rated for 25A. An Anpec APW8713 is a fully integrated 8A buck converter used for some minor CPU rail.

ASUS ROG ZENITH EXTREME (AMD X399) Motherboard Review 28 | TweakTown.comASUS ROG ZENITH EXTREME (AMD X399) Motherboard Review 29 | TweakTown.com

Both memory VRMs use ASP1103 PWMs along with two power phases. Each power phase gets a single high-side and low-side FET. I am not sure on the exact model of the MOSFETs, but they should get the job done as I have seen them on other very high-end ROG motherboards targeted at overclockers.

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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