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  1. #1
    ROG Guru: Orange Belt Array JimmyH PC Specs
    JimmyH PC Specs
    MotherboardROG Strix Z370-E
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    ROG Strix Z370-E - M2 SSD Explanation

    My system details are incorrect. I have edited my profile but they have not seemed to update yet.



    I recently upgraded my PC due to an unfortunate incident. I went with the ROG Z370-E.

    It comes with two M2 slots, one behind a cover, and another in the centre of the board. I am using the one under the cover or the M2_1 slot.

    Could someone please explain something to me.

    M2_1 shares SATA port 1 when it uses a SATA mode device, and M2_2 shares SATA port 56 when it uses PCIE mode device in X4 mode.

    What is X4 mode, and is there a noticeable difference between SATA mode and PCIE mode?

    My last question is in relation to temperatures. I live in Townsville, Australia which is sub-tropical. At the moment we are coming out of winter, about 26 deg C or 79 deg F, not hot enough for aircon. My SSD is sitting at 60 deg C and the specs say a max of 70 deg C, should I be concerned?

    I actually have a Hyper M2 x16 Card, would this be a cooler option??

    Thanks in advance.
    Last edited by JimmyH; 08-16-2018 at 04:12 AM. Reason: Spelling


    CPU i7 8700K: MB: ROG Strix Z370-E Corsair Vengeance 3000 (4x8GB) : GTX-1080: Samsung 970 EVO, 2 x Kingston Hyper X
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  2. #2
    TeamROG Moderator Array xeromist PC Specs
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    x1 vs x4 is the number of lanes and equates to bandwidth. Depending on the drive you may find that it is limited by an x1 connection.

    There are many differences between SATA and PCIE. First, your drive is one or the other so it's not just a random setting. They share the M.2 connection standard but work very differently. SATA is just like a 2.5" SATA SSD and it connects to the SATA controller. NVMe (PCIe) drives are PCI devices like a graphics card and they either connect to the chipset or directly to the CPU depending on several factors. Generally speaking NVMe drives can be significantly faster because they are not limited by the SATA controller.
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  3. #3
    ROG Guru: Orange Belt Array JimmyH PC Specs
    JimmyH PC Specs
    MotherboardROG Strix Z370-E
    Processor8700K
    Memory (part number)CMK32GX4M4B3200C16
    Graphics Card #1ASUS STRIX GTX 1080
    MonitorBenq 27" x 2
    Storage #1Samsung 970 EVO
    CPU CoolerThermaltake Floe Ring 360
    CaseThermaltake View 71
    Power SupplyCorsair RM 850x
    Keyboard Strix
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    Quote Originally Posted by xeromist View Post
    x1 vs x4 is the number of lanes and equates to bandwidth. Depending on the drive you may find that it is limited by an x1 connection.

    There are many differences between SATA and PCIE. First, your drive is one or the other so it's not just a random setting. They share the M.2 connection standard but work very differently. SATA is just like a 2.5" SATA SSD and it connects to the SATA controller. NVMe (PCIe) drives are PCI devices like a graphics card and they either connect to the chipset or directly to the CPU depending on several factors. Generally speaking NVMe drives can be significantly faster because they are not limited by the SATA controller.
    That explains a lot mate. I had my new NVME is M2_1 which was set to SATA. Thanks.


    CPU i7 8700K: MB: ROG Strix Z370-E Corsair Vengeance 3000 (4x8GB) : GTX-1080: Samsung 970 EVO, 2 x Kingston Hyper X
    500GB Velocerapter, PSU Corsair RM 850x
    Case Thermaltake View 71: Cooling Thermaltake Floe Riing 360 mm

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