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EVGA Z170 FTW (Intel Z170) Motherboard Review (Page 3)

Steven Bassiri | Aug 10, 2015 at 03:22 pm CDT - 1 min, 43 secs reading time for this page
Rating: 90%Manufacturer: EVGA

Circuit Analysis

EVGA Z170 FTW (Intel Z170) Motherboard Review 17 | TweakTown.com

In my opinion, motherboards look best when they don't have any heat sinks on them.

EVGA Z170 FTW (Intel Z170) Motherboard Review 18 | TweakTown.com

There are four major input rails to the CPU for Z170; VCC (VCore), VCCGT (Graphics core), VCCSA (System Agent), and VCCIO (CPU IO). EVGA decided to implement a 5+4+1 phase VRM for the CPU+iGP+VCCSA. The output filter is a mixture of 560uF 5K solid can-type capacitors as well as some 470uF tantalums. The inductors are custom made for EVGA, and they are most likely higher current inductors.

EVGA Z170 FTW (Intel Z170) Motherboard Review 19 | TweakTown.comEVGA Z170 FTW (Intel Z170) Motherboard Review 20 | TweakTown.com

EVGA went with digital power for both the CPU and memory VRMs, however, the CPU's VRMs use two International Rectifier IR35201 digital PWMs which each support 6+2 phase operation. One is used for the CPU VCore and VCCSA providing 5+1 phase output to six International Rectifier IR3553Ms which are 40A integrated power stages. The second IR35201 is only used as 4+0 providing power to the iGPU power phases which aren't cooled by the heat sink. This is one of the better VRMs I have seen in both true phase count (five phases) as well as component selection (full digital and high current power stages).

EVGA Z170 FTW (Intel Z170) Motherboard Review 21 | TweakTown.comEVGA Z170 FTW (Intel Z170) Motherboard Review 22 | TweakTown.com

The VCCIO gets its power from an International Rectifier IR3898 which is an integrated point of load device (POL) step down DC/DC regulator supporting up to 6A. The memory VRM is controlled by an International Rectifier IR3570 which is a 3+2 phase digital PWM.

EVGA Z170 FTW (Intel Z170) Motherboard Review 23 | TweakTown.comEVGA Z170 FTW (Intel Z170) Motherboard Review 24 | TweakTown.com

Three IR3553, the same integrated power stages used for the CPU VRM, are used for the memory VRM. I believe that two phases are for DDR power and the VPP gets a single phase. Two single phase VRMs controlled by Anpec APM8720Cs are used for PCH power, or one of the VRMs controlled by Anpec is used for the DDR VPP, and the memory VRM is a three phase VRM. Either way, EVGA has done a very fine job with digital voltage regulation for the important power rails for the CPU and memory.

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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