Can't fit UAD-2 into PCIe slot?

Can't fit UAD-2 into PCIe slot? short pcie slot My motherboard has three pcie x16 size slots, but I cannot use one of them for usb controller pcie x4 card: the pcie16_1 is for GPU, the short slot So, a PCIe x16 graphics card won't fit in a x1, x2, x4 or x8 slot In short, the slot into which the expansion card is being inserted

short slot PCIe x1 Slots are the smallest of the four PCIe slot standards for motherboards! These slots may not always be present on your motherboard for a variety of

7jl slot My motherboard is an ASUS Prime Z370-A It has several expansion slots, and per the manual the short ones are PCIe 1 the long ones are PCIe  QNAP TS-1264eU-RP-8G , 12-Bay, Intel CPU, 8GB RAM, PCIe Slot, Redundant Power, 2U short-depth Rackmount · Intel® Celeron® quad-core CPU, redundant power