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  1. #1
    ROG Junior Member Array
    Join Date
    Oct 2013
    Reputation
    10
    Posts
    2

    ROG Crosshair VIII Extreme DIMM.2 Bandwidth

    Hi. I just purchased the CH VIII Extreme and the DIMM.2 was one of the factors that attracted me. I'm running a 5950x, 3090 Kingpin, 32GB RAM, WD SN750 Black 500GB PCIE 3 M.2 in M.2-1 slot on board as a boot drive and 2 WD SN850 Black 1TB PCIE 4 M.2's on the DIMM.2 as game drives. I prefer not to run them on the MB M.2 slots 2 and 3 because I would drop to 3090 to 8x interface. In CrystalDiskMArk the SN850's should get about 7000 seq reads and did in my previous Dark Hero board. In the DIMM.2 one of them gets just over 6000 and the other only 3000. Is there a setting in the UEFi that I'm missing or is this just a bandwidth limitation? If I run them in raid 0 on the DIMM.2 I get just over 5000 and was getting about 13,000 in raid 0 on the Dark Hero. Thanks!

  2. #2
    New ROGer Array
    Join Date
    Oct 2021
    Reputation
    10
    Posts
    1

    This is happening to me also. Using Samsung Magician I can see under drive details that' it's running at x2 lanes instead of x4.

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