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GTX 1080 Ti Strix OC doesn't fit in the first PCIE slot

Hoping somebody can help me resolve this issue.

Tried to fit in a GTX 1080 Ti Strix OC on a Z370 AORUS Gaming 7, unfortunately, doesn't fit in the first slot so mounted it in the middle slot but its PCIE x8 instead of x16. Is there a way for the GPU to run at x16 speeds when mounted in the middle slot.

Thanks in advance.
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More about gtx 1080 strix fit pcie slot
  1. That should fit with no problems. This is with a large D15 cooler.

    https://pcpartpicker.com/b/ZnyXsY
  2. Apparently some GPUs fit and some don't, like the issue with AORUS 1080 Ti hitting the AMP-UP Audio Shroud. I never saw an issue with Strix OC though. Is there a way for the middle slot to run at x16?
  3. Look very carefully and see if you can see exactly why it's not fitting (if you don't already know). It is surprising how many times you can make it fit with small modifications.
  4. ugh...looks it's their "All-New Heatsink Design" (https://www.gigabyte.com/Motherboard/Z370-AORUS-Gaming-7-rev-10#kf), the one that sits right next to the M.2 slots (file:///C:/Users/10115529/Downloads/mb_manual_z370-aorus-gaming-7_e.pdf), that's blocking your GPU.

    Bad news is, it sounds like you're stuck using that STRIX in the x8 slot. Good news is, it's not going to run any slower than if you had 2 of them operating in SLI (the x16 slot drops down to x8 when a 2nd GPU is operating in SLI mode), so I'm thinking the performance loss is going to be minimal.
  5. infectedparadox said:
    Hoping somebody can help me resolve this issue.

    Tried to fit in a GTX 1080 Ti Strix OC on a Z370 AORUS Gaming 7, unfortunately, doesn't fit in the first slot so mounted it in the middle slot but its PCIE x8 instead of x16. Is there a way for the GPU to run at x16 speeds when mounted in the middle slot.

    Thanks in advance.


    What's preventing installation in the first slot?

    https://www.pugetsystems.com/labs/articles/Impact-of-PCI-E-Speed-on-Gaming-Performance-518/ Performance impact seems negligible.
  6. Not sure what's preventing the installation in the first slot, I tried mounting it for 15 min doing everything I can but it just wouldn't go in, it just smoothly went into the 2nd slot the first try though.
  7. infectedparadox said:
    Not sure what's preventing the installation in the first slot, I tried mounting it for 15 min doing everything I can but it just wouldn't go in, it just smoothly went into the 2nd slot the first try though.

    Then find out why. Its I/O panel can hit the motherboard. The backside could be hitting the heatsink. The far right side might be hitting a HDD case/enclosure/cage.
  8. It was the heatsink, I used a fair amount of force and now it went in the 1st slot and also touching the heatsink, the whole heatsink is not level, at the top it has a metal plate which is the prob. Thanks for the help guys.
  9. Dremel tools are very handy for grinding heatsinks. Just make sure you TAKE IT OUT of the chassis if you do it because you don't want those little particles of metal and abrasive flying around inside your chassis.
  10. Should I just keep it the way it is now or do I rip off the metal plate for a little breathing room for the bottom of the GPU.
  11. Best answer
    If you are looking for an opinion..."if it's not broke, don't fix it". There's always a chance of screwing something up.

    If you are concerned about temps...monitor them first to see if you even have an issue. I'm thinking that there's a good chance you won't and you will be able to leave it the way you have it forever.
  12. infectedparadox said:
    It was the heatsink, I used a fair amount of force and now it went in the 1st slot and also touching the heatsink, the whole heatsink is not level, at the top it has a metal plate which is the prob. Thanks for the help guys.


    I'd be worried about shorting something.
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