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  1. #1
    ROG Member Array
    Join Date
    May 2015

    1080 in SLI running at x16/x8

    I have a RVE10 with a 6950x paired up with two 1080 classifieds. I'm using the high bandwidth bridge and they are both in the 1st and 3rd slot. Looking at GPUZ one card is running at x16 3.0 but the other is running at x8.0 3.0. I went into the bios and set them both to gen 3.0 but they are still not running at x16/16

    I've run the render test, they are running at x16/x8.

    Is there anyway to force them to run at x16?

    Another key thing is I have an intel 750 in the 2nd slot, is that making the cards running at 16/8?

    ANy help appreciated thanks!*

  2. #2
    ROG Guru: Diamond Belt Array Zka17's Avatar
    Join Date
    Mar 2012

    Quote Originally Posted by TrevorR View Post
    Another key thing is I have an intel 750 in the 2nd slot, is that making the cards running at 16/8?*
    There may be the thing... according to the manual (page 1-8), if the first 3 slots are populated, then it will be 16/8/8...

  3. #3

  4. #4
    ROG Member Array
    Join Date
    May 2015

    Issue has been resolved thanks to the first poster.

    I moved my Intel 750 to the x4 slot right below the 2nd pcie slot and it now reads x16/x16. I''ve been running the previous setup for the past 6 months and consistently scored 22k in fire strike 3dmark. I tested it after the new setup for chits and giggles and my fire strike score boosted to 29k.... Uhh.. Witcher 3 FPS went up by 8-9 on average. Uhhh?

    Does x16/16 make that much of a difference over x8?? I really can't believe I've been running this since I got it. I just now 6 months after getting the cards noticed the x16/x8...

  5. #5
    ROG Guru: Grand Master Array
    Join Date
    Oct 2012

    Can't speak for a SLI setup. But as far as a single GPU goes, the difference between x16 and x8 is very small.

  6. #6
    ROG Guru: Yellow Belt Array Zarathustraa PC Specs
    Zarathustraa PC Specs
    MotherboardRampage V Extreme
    Processori7 5930k
    Memory (part number)F4-3000C15Q-32GRK
    Graphics Card #1Dragon 660ti 2GD5
    Monitor3 x VG27AH
    Storage #1850 Pro 1TB
    Storage #2850 Pro 256GB
    CPU CoolerNoctua Nh-D15
    CaseCorsair 780T
    Power SupplyCorsair AX1500i
    Keyboard Kinesis Advantage
    Mouse Logitech G502
    OS Windows 8.1, and Linux Mint
    Accessory #1 Aquaero 6xt

    Join Date
    Jan 2014

    x16 only really matters if you're doing bitcoin mining, data analysis, or some type of AI task with the gpus.

  7. #7
    Banned Array JustinThyme PC Specs
    JustinThyme PC Specs
    Laptop (Model)G752VY-DH72
    MotherboardRampage VI Extreme
    ProcessorI9 9940X
    Memory (part number)64GB DDR4 8x8 Corsair Dominator Platinum 3800 MHz @ C17
    Graphics Card #1ASUS Strix 2080Ti O11G @ 2.1GHz
    Graphics Card #2ASUS Strix 2080Ti O11G @ 2.1Ghz
    Graphics Card #3ROG Nvlink
    Graphics Card #4Have to feed animals
    Sound CardExternal Audioengine D1 24 bit 192kbps DAC
    MonitorASUS PG348Q @ 100Hz
    Storage #1Intel 905P 480GB U2 flavor
    Storage #2Samsung 850 EVO 1TB X2 in RAID 0, 960 PRO 1TB DIMM.2_1
    CPU CoolerHeatKiller IV PRO and VRM blocks ,Dual D5 PWM serial, 2X 480, 1X 360 RADS
    CasePhanteks Enthoo Elite 8X LL120 PWM, 3X LL140 PWM, 12 SP120 PWM 1x AF140 PWM
    Power SupplyCorsair AX 1500i
    Keyboard ASUS Claymore
    Mouse ASUS Spatha, Logitech MX Master
    Headset Sennheiser HD 700
    Mouse Pad ASUS ROG Sheath
    Headset/Speakers Audioengine A5+ with SVS SB-1000 Sub
    OS Win10 Pro 1809
    Network RouterNetGear NightHawk X10
    Accessory #1 NetGear Prosafe 10GBe Switch
    Accessory #2 Qnap TVS-682 NAS modded with I7 CPU

    Join Date
    Nov 2013

    Ive noted no difference in x16 vs X8. The cards bandwidth doesn't exceed X8. I imagine you had other issues in your config with the SSD sharing bandwidth.

  8. #8
    ROG Enthusiast Array
    Join Date
    Mar 2016

    Yup, impossible to notice more than a 1% variation in 3DMark (that is to say within the benchmark error margin) when going from 16/8 to 16/16.

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