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ASUS ROG Maximus IX Apex (Intel Z270) Motherboard Review (Page 3)

Steven Bassiri | Feb 20, 2017 at 8:10 am CST - 1 min, 8 secs time to read this page
Rating: 95%Manufacturer: ASUS

Circuit Analysis

ASUS ROG Maximus IX Apex (Intel Z270) Motherboard Review 21 | TweakTown.com

The Maximus IX Apex looks good in the nude!

ASUS ROG Maximus IX Apex (Intel Z270) Motherboard Review 22 | TweakTown.comASUS ROG Maximus IX Apex (Intel Z270) Motherboard Review 23 | TweakTown.com

The VRM on this motherboard is in an 8+2 phase configuration. Each phase uses a Texas Instruments CSD87350 NexFET, which offer a smaller footprint, high efficiency, and solid output current. The motherboard's PWM is from IR/Infineon and is labeled ASP1405. The ASM1405 seems to be the IR35201(6+2) or IR35203(4+2 phase), but it doesn't matter exactly which one since the PWM outputs 4+2 phases. There are multiple IR3599 phase doublers used to double four PWM channels to eight for the CPU VCore. ASUS has also chosen to use their Micro Fine Alloy chokes, and 10K gun-metal Japanese FP caps.

ASUS ROG Maximus IX Apex (Intel Z270) Motherboard Review 24 | TweakTown.comASUS ROG Maximus IX Apex (Intel Z270) Motherboard Review 25 | TweakTown.com

On the backside of the motherboard, we find 10 IR3535 drivers, one per phase. Skylake and KabyLake don't use much power, and four phases are enough, ASUS is also doubling the correct way. For the VCCIO, VCCSA, and other minor CPU rails ASUS uses a combination of Texas Instruments fully-integrated power converters and single phase VRMs. We also can find an IDT6V41638 clock buffer to improve BCLK clocking abilities.

ASUS ROG Maximus IX Apex (Intel Z270) Motherboard Review 26 | TweakTown.com

The memory VRM consists of two phases using one high-side MOSFET and one low-side MOSFET; their form factor is very small to offer more space for overclocking features. The PWM for the memory VRM is the ASP1103.

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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