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  1. #1
    ROG Member Array MiRai PC Specs
    MiRai PC Specs
    MotherboardAsus Rampage V Edition 10
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    RVE10 X99 PCIe Lane Distribution

    I recently purchased the Rampage V Edition 10 motherboard, and I'm looking to add a few M.2 drives to it along with two GPUs. Here's what I'm thinking of doing with the PCIe slot configuration:

    PCIE8x_1 GPU 1 PCIe 3.0 8x
    PCIE8x_2 M.2 PCIe 3.0 4x RAID 1 w/ PCIE8x_4
    PCIE8x_3 GPU 2 PCIe 3.0 8x
    PCIE8x_4 M.2 PCIe 3.0 4x RAID 1 w/ PCIE8x_2

    Now, I'm also looking to add an M.2 drive onto the board itself, and upon reading the specifications listed on the site, the on-board M.2 drive will "share bandwidth" from PCIE8x_4.

    So, my question is... Should I expect any issues with transfer rates on either M.2 drive if each of them are only capable of using four lanes out of the available eight? Will each PCIe 4x device be dedicated to four of the eight lanes, or will they sometimes trip over each other and cause potential issues?

    If it helps answer the question... The CPU has the full 40 PCIe lanes, the on-board M.2 drive will be the system drive, and the two M.2 drives in the PCIe slots will be a single games drive in RAID 1.

    Thanks!
    Last edited by MiRai; 08-04-2017 at 02:51 AM. Reason: Replaced [CODE] Tags w/ Table

  2. #2
    ROG Guru: Brown Belt Array Brighttail PC Specs
    Brighttail PC Specs
    Laptop (Model)Asus G751JT
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    I have a R5E10. I have a 40 lane CPU. I have run two GPUs in slot 1 & 3 at x16 with one m.2 in the m.2 slot AND one m.2 in the pCI-e slot. No issue UNTIL i try to populate that fourth slot.. then I get a reduction of one of my GUPs to x8.
    Panteks Enthoo Elite / Asus x299 Rampage VI Extreme / Intel I9-7900X / Corsair Dominator Platinum SE 4x8 3200MHz
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  3. #3
    ROG Member Array MiRai PC Specs
    MiRai PC Specs
    MotherboardAsus Rampage V Edition 10
    ProcessorIntel 6950X
    Memory (part number)G.Skill 64GB (8x8GB) 3200MHz
    Graphics Card #1EVGA GTX 1080 Ti FTW3
    Graphics Card #2EVGA GTX 1080 Ti FTW3
    Storage #1Samsung 960 Pro m.2
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    Quote Originally Posted by Brighttail View Post
    I have a R5E10. I have a 40 lane CPU. I have run two GPUs in slot 1 & 3 at x16 with one m.2 in the m.2 slot AND one m.2 in the pCI-e slot. No issue UNTIL i try to populate that fourth slot.. then I get a reduction of one of my GUPs to x8.
    Well, that's certainly good to hear (I'm okay with GPUs running in 8x). However, I'm still wondering if two 4x devices that share lanes of the same PCIe 8x "slot" will end up tripping over each other, or whether the motherboard will map them to their own dedicated lanes.

    EDIT: Removed the part about SLI bridges and clearance, as it was solved and mostly unimportant.
    Last edited by MiRai; 08-04-2017 at 07:35 PM.

  4. #4
    ROG Guru: Grand Master Array
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    If you want to maximize your GPU performance, you shouldn't ditch the HB SLI bridge.

  5. #5
    ROG Member Array MiRai PC Specs
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    MotherboardAsus Rampage V Edition 10
    ProcessorIntel 6950X
    Memory (part number)G.Skill 64GB (8x8GB) 3200MHz
    Graphics Card #1EVGA GTX 1080 Ti FTW3
    Graphics Card #2EVGA GTX 1080 Ti FTW3
    Storage #1Samsung 960 Pro m.2
    Storage #2Samsung 960 Pro m.2
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    Quote Originally Posted by Chino View Post
    If you want to maximize your GPU performance, you shouldn't ditch the HB SLI bridge.
    Yeah, upon the research I was doing, two single, ribbon bridges aren't exactly the same as an HB bridge when it comes to high-resolution gaming. However, I did figure out how to keep the current setup and use an HB bridge, so I can probably just remove the bit from my prior post.

    I'll be moving forward with the above configuration, and I'll just have to run my own tests to see if there is a problem with two 4x devices sharing the lanes of PCIE8x_4. Even if there is, I can always return some of the hardware and ditch the RAID setup.
    Last edited by MiRai; 08-04-2017 at 07:35 PM.

  6. #6
    ROG Guru: Gold Belt Array Menthol PC Specs
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    MotherboardM 10 Apex / XI gene
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    I had a Samsung M.2 (960 Pro) and an Intel 750 1.2 TB in the bottom slot both worked fine at rated speeds, as stated one GPU will be reduced to X8 speed

  7. #7
    ROG Member Array MiRai PC Specs
    MiRai PC Specs
    MotherboardAsus Rampage V Edition 10
    ProcessorIntel 6950X
    Memory (part number)G.Skill 64GB (8x8GB) 3200MHz
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    Quote Originally Posted by Menthol View Post
    I had a Samsung M.2 (960 Pro) and an Intel 750 1.2 TB in the bottom slot both worked fine at rated speeds, as stated one GPU will be reduced to X8 speed
    Fantastic. Thanks for a second confirmation.

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