New Desktop Build for 2023 - CPU Choice?

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  1. Posts : 7,940
    Windows 11 Pro 64 bit
    Thread Starter
       #31

    After further review I think the Asus Strix motherboard is going to be too tight a fit for the Noctua NH-D14 fam. I'm going to return the motherboard and save some money by buying either the Gigabyte Z790 UD AX or ASUS TUF GAMING Z790-PLUS WIFI motherboard. What are people's views on these motherboards for a new PC having an Intel i7-13700K CPU, noting the Gigabyte board is much cheaper? Both boards have all the features I need and are compatible with my existing Noctua NH-D14 cooler, without rotating the fan 90 degrees.
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  2. Posts : 4,668
    several
       #32

    Check the reviews to see what the vrm is like on boards you are considering for an i7 K sku.

    I dont know if hardware unboxed has reviewed those yet.
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  3. Posts : 1,113
    windows 10
       #33

    Techpowerup gives indications of the vrm and a temperature test but I don't think the 2 motherboards have been examined.

    For the gigabyte I found this:
    "This Gigabyte Z790 Aorus Elite AX is quite simple at the PCB level, we are here on a well designed and well made motherboard but nothing more.




    The power supply stage is based on a power supply whose part in charge of the CPU consists of 16 phases (in parallel 8+8).



    The controller used would be an ONsemi NCP01530R capable of managing all the phases. The 16 mosfets are all Onsemi FDMF5062 70A. Enough to have plenty of room for overclocking. Next we have a phase for the VCCGT (IGP) Onsemi NCP302455 of 55A. Finally, we have two 60A Onsemi NCP303160 phases for the VCCAUX (PCIe and IMC)."

    I think motherboards are designed for supported tdp processors. I am not able to differentiate the vrms by having the technical data. I'll get to it for my build.
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  4. Posts : 4,668
    several
       #34

    16 phases (in parallel 8+8).
    sounds the same as the cheaper Gigabyte Z790 UD AX from gigabyte website:

    Z790 UD AX (rev. 1.0) Key Features | Motherboard - GIGABYTE Global

    Unparalleled Performance:Twin 16*+1+1 Phases Digital VRM Solution
    * 8+8 phases parallel power design
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  5. Posts : 1,113
    windows 10
       #35

    I got the wrong reference for the gigabyte. I couldn't find a review. So much the better, if the vrm matches the asus gigabyte z790 ud ax.

    There is no review for these motherboard after a little research.
    Well, for me it's not now that I make my build until then I would have better luck.
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  6. Posts : 1,113
    windows 10
       #36

    I bookmarked it "Motherboard VRMs: What are Power Phases, and How Many Should I Have?" if you are interested it is very short. Motherboard VRMs: What are Power Phases, and How Many Should I Have? - Logical Increments Blog

    I have already said motherboards must be designed at the vrm level for the processors they support. Otherwise vrm issues would be in the web a long time ago. Most people buy their motherboard and processors without worrying about the vrm. Personally I will still do a little reading on the vrm before buying the motherboard.
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  7. Posts : 1,113
    windows 10
       #37

    By reading the link I gave you will know that it is not important to worry about the vrm.

    Pay attention to the bios menu of each asus and gigabyte motherboard, especially at the cpu configuration level. In short, motherboards can exceed the maximum tdp of processors, that says "no power limit". In the bios there are 2 options each can be configured, from memory, with a tdp of 4092 watts. It means no tdp limit. By default these 2 options can be configured on 4092 watts and be grayed out impossible to change, that's what I saw for a z690 or b660 motherboard I don't know exactly. See if these 2 options can be changed for the 2 motherboards you have chosen. I don't have their name but the max is around 4090 and in watts which normally can be changed with a much lower starting number.
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  8. Posts : 328
    Win 10 and 11
       #38

    itsme1 said:
    By reading the link I gave you will know that it is not important to worry about the vrm.

    Pay attention to the bios menu of each asus and gigabyte motherboard, especially at the cpu configuration level. In short, motherboards can exceed the maximum tdp of processors, that says "no power limit". In the bios there are 2 options each can be configured, from memory, with a tdp of 4092 watts. It means no tdp limit. By default these 2 options can be configured on 4092 watts and be grayed out impossible to change, that's what I saw for a z690 or b660 motherboard I don't know exactly. See if these 2 options can be changed for the 2 motherboards you have chosen. I don't have their name but the max is around 4090 and in watts which normally can be changed with a much lower starting number.
    At 4092 Watts, that processor would probably give off light.
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  9. Posts : 7,940
    Windows 11 Pro 64 bit
    Thread Starter
       #39

    itsme1 said:
    By reading the link I gave you will know that it is not important to worry about the vrm.

    Pay attention to the bios menu of each asus and gigabyte motherboard, especially at the cpu configuration level. In short, motherboards can exceed the maximum tdp of processors, that says "no power limit". In the bios there are 2 options each can be configured, from memory, with a tdp of 4092 watts. It means no tdp limit. By default these 2 options can be configured on 4092 watts and be grayed out impossible to change, that's what I saw for a z690 or b660 motherboard I don't know exactly. See if these 2 options can be changed for the 2 motherboards you have chosen. I don't have their name but the max is around 4090 and in watts which normally can be changed with a much lower starting number.
    Thanks. I've worked out how to limit power drawn and core / package temperatures plus reducing CPU voltage to keep power and temperatures under control. This seems poor thermal management engineering on the part of Intel since only advanced users like those posting here have the skills to set the correct configuration.
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  10. Posts : 1,113
    windows 10
       #40

    Catnip said:
    At 4092 Watts, that processor would probably give off light.
    And air-cooled cpu cooling melt like snow

    Steve C said:
    Thanks. I've worked out how to limit power drawn and core / package temperatures plus reducing CPU voltage to keep power and temperatures under control. This seems poor thermal management engineering on the part of Intel since only advanced users like those posting here have the skills to set the correct configuration.
    It's exactly that. What you did you will need to do with the new motherboard to get everything to default cpu operation. That's what I will do.
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