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2x16GB 3200 MHz CL 14-14-14-34 or 4x8GB 3866 MHz CL 18-19-19-39

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  • 2x16GB 3200 MHz CL 14-14-14-34 or 4x8GB 3866 MHz CL 18-19-19-39

    Hello,

    Here is our configuration in project: (49 PCs to equip)
    Case: Silent Base 800 Black be quite
    Ventirad: Dark Rock Pro 3 be quiet
    Power Supply: Dark Power Pro 11 750W be quiet
    Motherboard: Asus ROG Maximus IX Formula (DUAL CHANNEL, 4 DDR4-4133MHz slots, Z270 chipset, Socket LGA1151)
    Processor: Intel Core i7-7700K
    RAM 32 GB: but which modules ???
    Graphics card: Asus GeForce 1080 Ti ROG STRIX OC - 11 GB
    Disc 1: Samsung 960 Pro NVMe M.2 SSD PCIe 512 GB
    Disc 2: Samsung 960 Pro NVMe M.2 SSD PCIe 1 TB
    Disc 3: WD Gold 10 TB SATA 3
    Screen: LG 38UC99
    Operating system: Windows 10 Pro 64 bits

    For the RAM (32GB), we need your help:

    G.Skill USA Tech Support Team told us what follows:
    Trident Z DDR4 kit 2 x 16GB 3866 is best (DDR4-3866MHz kit F4-3866C18D-32GTZR).
    The motherboard and CPU have less stress with only 2 modules installed.
    With 4 modules, it needs to power and communicate with double the amount of modules so it is less effective.

    But G.Skill Euro Tech Support Team told us what follows:
    >> The DDR4-3866MHz kit F4-3866C18D-32GTZR (2x16GB) is not compatible with your system setup (Intel Core i7-7700K and ASUS Maximus IX Formula). For your system, we would highly recommend a DDR4-3200MHz CL14-14-14-34 with 16GBx2 (F4-3200C14D-32GTZKW) for best stability, compatibility and performance (F4-3200C14D-32GTZKW). Based on our performance tests.
    >> You may also consider 8GBx4, but 16GBx2 should provide a slightly better performance on your platform.

    Could you tell us your opinion?

    Do you think that
    the Trident Z F4-3200C14D-32GTZKW (2x16GB) CL 14-14-14-34
    https://www.gskill.com/en/product/f4-3200c14d-32gtzkw

    would be better than
    the Trident Z F4-3866C18Q-32GTZKW (4x8GB) CL 18-19-19-39
    https://www.gskill.com/en/product/f4-3866c18q-32gtzkw

    G. Skill 16 Go 3200 CL14 : Latency 83 ns ; Read 13,7 GB/s ; Write : 8,4 GB/s
    G. Skill 8 Go 3866 CL18 : Latency 17 ns ; Read 22,3 GB/s ; Write 18,5 GB/s
    Source : https://www.memorybenchmark.net/
    The result seems to favor the 4x8GB solution.
    But is the test really accurate?

    Do you propose a better solution (for best stability, compatibility and performance)?
    We really want the best from G.Skill.

    For example, why not
    the 2x16GB 3333 Mhz (CL 16-18-18-38)?
    Or
    the 2x16GB 3400 Mhz (CL 16-18-18-38)?
    They seem better than the 2x16GB 3200 MHz (CL 14-14-14-34).
    But are they?

    Thank you very much for your help.
    Last edited by MadScribe; 09-30-2017, 08:56 AM.

  • #2
    I found myself the following informations, maybe usefull for others:

    Trident Z 2x16GB 3200 Mhz (CL 14-14-14-34) F4-3200C14D-32GTZKW
    (module known for its very high reliability, stability, compatibility and performance)
    https://www.gskill.com/en/product/f4-3200c14d-32gtzkw

    Trident Z 2x16GB 3333 Mhz (CL 16-18-18-38) F4-3333C16D-32GTZKW
    (slight gain in frequency, but slowed down by latency)
    https://www.gskill.com/en/product/f4-3333c16d-32gtzkw

    Trident Z 2x16GB 3400 Mhz (CL 16-16-16-36) F4-3400C16D-32GTZ
    NOT COMPATIBLE according to G. Skill but compatible according to VQL of Asus
    https://www.gskill.com/en/product/f4-3400c16d-32gtz

    Trident Z 2x16GB 3466 Mhz (CL 16-18-18-38) F4-3466C16D-32GTZSW :
    NOT COMPATIBLE according to VQL of Asus but compatible according to G.Skill
    https://www.gskill.com/en/product/f4-3466c16d-32gtzsw

    Trident Z 2x16GB 3600 Mhz (CL 17-19-19-39) F4-3600C17D-32GTZR (ou en N/B : F4-3600C17D-32GTZKW)
    NOT COMPATIBLE according to VQL of Asus but compatible according to G.Skill
    https://www.gskill.com/en/product/f4-3600c17d-32gtzr

    Trident Z 2x16GB 3866 MHz (CL 18-18-18-38) 3866MHz kit F4-3866C18D-32GTZR
    NOT COMPATIBLE according to G.Skill and according to VQL of Asus
    https://www.gskill.com/en/product/f4-3866c18d-32gtzr

    Trident Z 4x8GB 3866 MHz (CL 18-19-19-39) F4-3866C18Q-32GTZKW
    (slight gain in frequency but 4 modules are more stressing than 2 for the motherboard and the CPU)
    https://www.gskill.com/en/product/f4-3866c18q-32gtzkw

    Are those informations correct or just not updated by G. Slill or by Asus?
    They lead to the choice highly recommend by G.Skill Euro Tech Support Team:
    The Trident Z 2x16GB 3200 Mhz (CL 14-14-14-34) F4-3200C14D-32GTZKW

    Could you tell us your opinion?

    Thank you for your advises.
    Last edited by MadScribe; 10-01-2017, 11:22 PM.

    Comment


    • #3
      The reason the DDR4-3200 CL14 models are so popular is their great out-of-the-box performance and compatibility, but also their huge overclocking headroom. Depending on the platform used, you can easily get DDR4-3600 CL15/CL16 or DDR4-4000 CL18/CL19 out of them at very moderate volts. They can also be used for more serious overclocking with higher voltages, but that is probably not what you are looking for.
      Team HardwareLUXX | Show off your G.SKILL products!

      Comment


      • #4
        Hello Emissary,
        Thank you for your usefull explanation.

        I am not sure to understand perfectly.

        1) When you say:
        « Depending on the platform used, you can easily get DDR4-3600 CL15/CL16 or DDR4-4000 CL18/CL19 out of THEM at very moderate volts ». Do you mean « THEM » = the DDR4-3200 CL14?

        2) When you say:
        « Depending on the platform used », what about our platform (Asus Maximus IX Formula + i7-7700K)?

        3) It seems that what you said is only about the DDR4-3200 CL14 and NOT about the other models listed and it seems that you prefer the Trident Z 2x16GB the DDR4-3200 CL14 COMPARED to the 3333 CL16, the 3400 CL16, the 3466 CL16, the 3600 CL17 and the 3866 CL18.
        Am I right ?

        And thank you again.

        Comment


        • #5
          Originally posted by MadScribe View Post
          Do you mean « THEM » = the DDR4-3200 CL14?
          I was talking specifically about the DDR4-3200 CL14 models.

          Originally posted by MadScribe View Post
          what about our platform (Asus Maximus IX Formula + i7-7700K)?
          I have a Maximus IX Apex and 7700K myself and no issues with kits up to DDR4-4133. However on your Formula you might already have to manually adjust settings from DDR4-3866 onwards, like with most 4 DIMM models.

          Originally posted by MadScribe View Post
          It seems that what you said is only about the DDR4-3200 CL14 and NOT about the other models listed and it seems that you prefer the Trident Z 2x16GB the DDR4-3200 CL14 COMPARED to the 3333 CL16, the 3400 CL16, the 3466 CL16, the 3600 CL17 and the 3866 CL18. Am I right?
          Some of the other parts use similar ICs, so you could expect comparable overclocks out of them. However compatibility of the XMP settings is lower when considering all AMD and Intel platforms. Like for example Intel Haswell-E (LGA2011-3) and AMD Ryzen (AM4) / Threadripper (TR4) all top out at/around DDR4-3200 on most motherboards, so there is little reason to pay extra for higher rated kits.

          If you don't plan to manually overclock the memory, i'd probably get the F4-3600C17D-32GTZR for your IX Formula. Out of the box DDR4-3600 CL17 is faster than DDR4-3200 CL14, so the F4-3200C14D-32GTZKW would only catch up with manual OC. In addition to that frequency wise DDR4-3600 is still pretty safe territory and the Z270 ROG models should be able to handle it well enough (I do recommend manually adjusting VCCSA/VCCIO though, since for higher memory frequencies most boards overvolt both voltages by a lot to maximise compatibility with weaker IMCs).
          Team HardwareLUXX | Show off your G.SKILL products!

          Comment


          • #6
            Well, it’s clear. Thanks !

            About the DDR4-3600 CL17,
            you say it is still « PRETTY » safe
            and that Z270 ROG models « SHOULD » be able to handle it,
            but about the DDR4-3200 CL14, you are absolutely sure !

            One last question:
            When you said that we « might have to manually adjust settings from DDR4-3866 »,
            I understand that you speek again about the settings of the DDR4-3200 CL14.
            >> Am I right?

            Comment


            • #7
              Originally posted by MadScribe View Post
              About the DDR4-3600 CL17, you say it is still « PRETTY » safe and that Z270 ROG models « SHOULD » be able to handle it, but about the DDR4-3200 CL14, you are absolutely sure!
              Some low tier boards might fail to properly train subtimings @ DDR4-3600, but the Maximus IX models are anything but low tier in terms of memory support.

              Originally posted by MadScribe View Post
              When you said that we « might have to manually adjust settings from DDR4-3866 »,
              I understand that you speek again about the settings of the DDR4-3200 CL14. >> Am I right?
              No, that is not limited to manual overclocking but can also apply to kits actually specced 3866 or higher. The supported memory frequency limit is not guaranteed to always be plug & play for most motherboards.
              Team HardwareLUXX | Show off your G.SKILL products!

              Comment

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