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ASUS ROG Maximus IX Formula Z270 Motherboard Review (Page 3)

By: Steven Bassiri from Jan 3, 2017 @ 11:30 CST
TweakTown Rating: 93%Manufacturer: ASUS

Circuit Analysis


Removing the shields and heat sinks reveals the front and back of the motherboard in the flesh.


The VRM here utilizes the same 8+2 phase count as its predecessor, but it's not the same VRM. The PWM has changed from what I am sure is an IR PWM to a lower pin count unknown PWM. It is labeled ASP1400 while its predecessor used the ASP1405. The PWM has a different top texture than what I found on the Maximus VIII Formula, but that could be from the restamping of the chip. It's also doubling 4 phases for the CPU into eight like its predecessor, but it's doing it by putting two NexFETs on a single driver, the driver has markings similar to Richtek products.

I am unsure of the PWM brand; it could be a lower phase count IR PWM or a digital/hybrid PWM from Richtek, Intersil, or any other PWM maker. The good news is that ASUS is still using Texas Instruments NexFETs, the same CSD87350 dual N-Channel MOSFETs, the same micro-fine alloy inductors, and 10K gun-metal capacitors.


The VCCSA, VCCIO, and other minor rails get their power from a variety of different voltage regulators powered by an APW integrated PWM, ON-Semiconductor PowerPAKs, and a Texas Instruments TPS51362 converter. The memory VRM is similar but not identical, a two-phase VRM capable of driving pretty much any memory overclock.

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