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  1. #1
    ROG Guru: Yellow Belt Array Nicklas0912 PC Specs
    Nicklas0912 PC Specs
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    Asus Crosshair VIII Hero Cant Change Cas Lanency! please help.

    Hello.

    I got a Asus Crosshair VIII Hero.

    No matter what I type in CAST Latency (CL) it wont do it. stock is CL 16-16-16-38 if I change that to CL 15-16-16-38 it will said what I typed, but it will stil be at CL 16. if I type 17, it will be 18 and so on, it does not work. im on bios 1201. Did try 2 other bios without any luck. what is going on here? only CL does not work, the rest in the memory timings works fine. did test the kit on my X299, no problems. This is a mortherboard issuse.

    It is this ram kit: https://www.proshop.dk/RAM/GSkill-Tr...C-32GB/2583289
    G.Skill TridentZ RGB DDR4-3600 C16 QC - 32GB

  2. #2
    ROG Guru: White Belt Array
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    Quote Originally Posted by Nicklas0912 View Post
    Hello.

    I got a Asus Crosshair VIII Hero.

    No matter what I type in CAST Latency (CL) it wont do it. stock is CL 16-16-16-38 if I change that to CL 15-16-16-38 it will said what I typed, but it will stil be at CL 16. if I type 17, it will be 18 and so on, it does not work. im on bios 1201. Did try 2 other bios without any luck. what is going on here? only CL does not work, the rest in the memory timings works fine. did test the kit on my X299, no problems. This is a mortherboard issuse.

    It is this ram kit: https://www.proshop.dk/RAM/GSkill-Tr...C-32GB/2583289
    G.Skill TridentZ RGB DDR4-3600 C16 QC - 32GB
    Thats because Ryzen only works with even numbers in for the CAS portion. So it can only be 14, 16, 18, 20, 22 etc.... the other settings can be both odd and even. All Ryzen work this way.

  3. #3
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    Quote Originally Posted by Lothos View Post
    Thats because Ryzen only works with even numbers in for the CAS portion. So it can only be 14, 16, 18, 20, 22 etc.... the other settings can be both odd and even. All Ryzen work this way.
    Actually you can disable Geardown Mode in BIOS and Ryzen work will odd latencies as well

  4. #4
    ROG Guru: Yellow Belt Array Nicklas0912 PC Specs
    Nicklas0912 PC Specs
    MotherboardX99-DELUXE II
    ProcessorCore I7 6900K
    Memory (part number)Corsair Dominator Platinum 16GB 3000Mhz
    Graphics Card #1GTX 980 TI Classfield
    Graphics Card #2GTX 980 TI Classfield
    Storage #12x Kingston HyberX 120GB Raid (OS)
    Storage #22x Kingston HyberX 240GB Raid (Games)
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    Quote Originally Posted by bak301 View Post
    Actually you can disable Geardown Mode in BIOS and Ryzen work will odd latencies as well

    Thanks so much!

  5. #5
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    Quote Originally Posted by Lothos View Post
    Thats because Ryzen only works with even numbers in for the CAS portion. So it can only be 14, 16, 18, 20, 22 etc.... the other settings can be both odd and even. All Ryzen work this way.
    Where did this false fact come from? I keep hearing it said is response to odd latencies, then eventually someone will mention setting Gear Down to false and the problem is solved.

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