AsRock z170 Pro4 VRM?

Hello, i want to know what VRM components on AsRock z170 Pro4? What exact name of PWM controller? What exact name of Mosfets on a AsRock z170 Pro4 has? This is very important information for me, please look for it if you don't know, i believe AsRock the last place where i can find this information.

Information about the device product code for PWM controllers and VRM power MOSFETs is rarely if ever provided by mother board manufactures.

If it is given, it will be only for high end boards, and even then the information will likely be marketing terms, such as Dr MOS or Dual Stack MOSFETs.

Your best chance of finding that information will be from reviews of mother boards, or in independent PC forums that have threads on the topic of VRM components. A reviewer may remove the VRM heatsinks to view the part numbers, or an owner of the board will do the same and post it in a forum thread.

IMO, the concern over VRM components is a topic that is beyond the understanding of anyone besides electrical engineers. A person in a forum post declaring that one part is better than another does not begin to judge how well a VRM design will truly perform. The only way to judge a VRM stage is to test it, and I have yet to see anyone test a VRM with the appropriate tools.

Not geeky at all, far too many people are oblivious as to the importance of the VRM design and how it effects the entire system. We all too often see people with heat issues or instability because they are trying to overclock on a 4+1 phase power system without understanding what it means and why it does not work very well with a 125w CPU.

That response does not surprise me at all. I would bet a similar response would be given by other manufactures.

I have noticed recently that one manufacture has listed the type of transistors used as the main power devices in the CPU VRM stage. But that is very unusual and only for one or two high end boards. The type of PWM controller is not listed.

Electronic components are not simple building blocks that are just connected together. The capacitors, inductors also matter, and the circuit design itself is more important than the parts being used. A poor design with expensive parts is still a poor design with poor performance.

Some manufactures have custom production runs of parts used in the CPU VRM stage, and the parts have proprietary markings that are not standard and cannot be cross referenced. Others even remove the markings on the chips or paint over them to keep them a secret.

Sorry to say, to expect to find costly transistors and ICs on a mid-range board that can be had for $110 is not realistic.

Honestly, I am surprised that a PC mother board can even be sold for under $200 and allow a company to be profitable. Intel quotes the price of the Z170 chipset in quantities of 1000 as $47 each.

http://ark.intel.com/products/90591/Intel-GL82Z170-PCH