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ASRock Z170 Extreme4 / Extreme4+ (Intel Z170) Motherboard Review (Page 3)

Steven Bassiri | Aug 17, 2015 at 11:46 am CDT - 1 min, 35 secs reading time for this page
Rating: 90%Manufacturer: ASRock

Circuit Analysis

ASRock Z170 Extreme4 / Extreme4+ (Intel Z170) Motherboard Review 16 | TweakTown.com

In my opinion motherboards look best when they don't have any heat sinks on them, but I know a lot of you like your heat sinks so I will take them off and do the circuit inspection so you don't have to!

ASRock Z170 Extreme4 / Extreme4+ (Intel Z170) Motherboard Review 17 | TweakTown.com

If you count the phases this VRM is a 6+4+1+1 phase VRM. There are four major input rails to the CPU for Z170; VCC (VCore), VCCGT (Graphics core), VCCSA (System Agent), and VCCIO (CPU IO). Counting the phases from the top right to the bottom left. The first four are for the VCCGT, then the next 6 are for the VCore, and single phases for the VCCIO and VCCSA follow. ASRock is using a 4+2 phase PWM which has its phases doubled to 6+4 for the VCore and VCCGT, the VCCIO and VCCSA each have their own single phase PWMs. ASRock is using 12K gold capacitors.

ASRock Z170 Extreme4 / Extreme4+ (Intel Z170) Motherboard Review 18 | TweakTown.comASRock Z170 Extreme4 / Extreme4+ (Intel Z170) Motherboard Review 19 | TweakTown.com

The Intersil ISL95856 is a hybrid digital PWM which has a total of 4+3 phase outputs with three integrated drivers. The CPU VCC (VCore) uses 3 phases of the 4 phase output, two drivers are integrated and a single ISL6625A labeled (5AZ) is used for the 3rd driver. Each driver outputs to set sets of MOSFETs. The VCCGT (integrated graphics) uses 2 phases of the 3 from the PWM and another ISL6625A is used as the second driver. I wasn't able to identify the MOSFETs, but they are of good enough quality to allow for my maximum CPU overclocks.

ASRock Z170 Extreme4 / Extreme4+ (Intel Z170) Motherboard Review 20 | TweakTown.comASRock Z170 Extreme4 / Extreme4+ (Intel Z170) Motherboard Review 21 | TweakTown.com

The VCCSA and VCCIO are each powered by their own Richtek RT8120 single phase PWMs. The memory PWM is also a single phase Richtek RT8120 and the same FETs are used for the memory as are used for the CPU.

ASRock Z170 Extreme4 / Extreme4+ (Intel Z170) Motherboard Review 22 | TweakTown.com

A single phase Ricktek PWM is used for the PCH power along with the same FETs as the memory VRM.

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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