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What do you make of this?

Discussion in 'Memory' started by Jake Billing, 18 Feb 2020.

  1. Jake Billing


    Joined: 18 Feb 2020

    Posts: 1

    Hello wonderful people!

    It's my first time reaching out for opinions and assistance on this particular subject...

    My system is brand new and running:
    Asus ROG Strix Z390-F Gaming (1401 BIOS Latest)
    Intel’s Core i9-9900KS Special Edition
    Corsair Vengeance LPX 32GB 2x16 DDR4 4000MHZ C19 XMP 2.0 (CMK32GX4M2F4000C19)

    When enabling the XMP II profile and reboot, the system fails to post over and over and reverts back to the default 2133MHZ memory speed after five attempts.

    When I enable the XMP II profile however manually change the memory speed to 3466MHZ (but no higher) and reboot, the system instantly posts and seems stable. (CINEBENCH/PRIME95)

    So my question really is, why could this be happening?

    I haven't changed the memory settings in any way other than enabling XMP II and reducing the operating frequency to 3466MHZ.

    I truly appreciate your time and support viewing this post.

    Thanks again,

    Jake Billing - YouTuber.
  2. Joxeon


    Joined: 15 Oct 2019

    Posts: 2,846

    Location: Uk

    Try giving the ram more voltage and see if that helps, still try work your way up from 3466.
    Up to 1.45v should be ok but I doubt you would need that much.
    Last edited: 18 Feb 2020
  3. Finners


    Joined: 27 Mar 2009

    Posts: 2,591

    I've looked at your motherboards memory QVL list and there are no 16GB dimms at such high speeds so it may just be a no go. The next thing I would check is that you have the RAM in slots 2+4 (counting left to right). These are the primary slots