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  1. #1
    ROG Member Array
    Join Date
    Jul 2016

    Question Connect Thunderboltex 3 card without sacrificing speed of other lanes?

    I am in a bit of a pickle here. I got a thunderbolt extension card that came with my x99 Deluxe II motherboard but I cannot seem to figure out an efficient way to connect it. I will try my best to explain the situation:
    I got a GTX 1080 connected to my PCIE-1 slot and since the card is big, it obstructs the PCIE-2 slot so I cannot use that. PCIE-3 slot shares bandwidth with my NVME SSD so I obviously would not want to connect it there. Only 2 slots remain: PCIE-4 and PCIE-5. If I connect the card to PCIE-4, my GPU no longer runs at x16 and is limited to X8. PCIE-5 should save the day, right? Not quite... I cannot select PCIE-5 in my UEFI settings for the thunderbolt. I can only select 1,2,3 or 4 but not 5.

    my CPU is a 28 laner i7 5820k

    any suggestions would be greatly appreciated...

    PS: I know that if my card runs at 8x, it doesn't affect the performance that much but there is still an ever slight difference between x8 and x16 so I'd like to avoid running my GPU at x8 at all costs

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