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  1. #1
    ROG Member Array match69 PC Specs
    match69 PC Specs
    MotherboardAsus Crosshair VI Hero
    ProcessorAMD Ryzen 1700x
    Memory (part number)Crucial Dominator Platinum 16GB
    Graphics Card #1Gigabyte GTX 970 ixoc
    Graphics Card #2Gigabyte GTX 970 ixoc
    MonitorAcer P235H
    Storage #1Samsung 970 Evo 500GB
    Storage #2Seagate 3Tb hdd
    CPU CoolerEK-FB ASUS C6H RGB Monoblock, bespoke cooling loop
    CasePhanteks Enthoo Primo
    Power SupplyAntec Truepower 750w
    Keyboard Asus Claymore Core + Bond
    Mouse Logitech 700s
    Headset Tritton Ax180
    Mouse Pad Razer Sphex
    Headset/Speakers Denon avxr2300w, Q Acoustics 3050
    OS Windows 10 Pro
    Network RouterTalkTalk (D-Link)

    Join Date
    Nov 2015
    Reputation
    10
    Posts
    8

    Asus Crosshair 6 Hero and slow Samsung 970 evo NVME drive possible fix

    Hi All,
    I have had a problem with a slow Samsung M.2 drive on my Asus Crosshair 6 Hero. I could only manage 800MB read and write speed. I thought I had tried everything in BIOS but having run Samsung Magician tonite I noticed it was running PCIE Gen 1 x 4. Went into BIOS and changed the M.2 link speed to Gen 3 and all is well. Samsung Magician is now showing 3500MB/sec read speed. Write speed is a little down at 2000MB/sec but I can live with that.
    I hope this is of help to others.
    Mark.

  2. #2
    ROG Member Array shilent PC Specs
    shilent PC Specs
    MotherboardAsus Crosshair VI
    ProcessorRyzen 1600x
    Memory (part number)2x8 Gskill 3200 CL14 (B-die)
    Graphics Card #1MSI Vega 56 Air Boost
    Sound CardSound Blaster X AE-5
    Storage #1Adata SX700 512GB M.2
    Storage #2Samsung 850 Pro SATA
    CPU CoolerHeatkiller water block
    CasePhanteks Evolv
    Power SupplySeasonic SS-1050XM2
    OS Windows 10 x64

    Join Date
    Aug 2017
    Reputation
    10
    Posts
    13

    I'm having the same problem for over a year now. Changing to Gen3 does not help. I can switch it to Gen2 and performance is cut to half, about 400MB/s.

    I noticed that it'll be x1 when the motherboard is cold. After gaming and rebooting, it'll switch to x4.

    Is yours consistently booting in x4 now? Try checking the morning when the motherboard has been off and has cooled down.

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