Are UAD-2 cards supported on PCIe x4 or x16 slots?

Pcie X16 - pcle x16 slot The PCI Express x1 to x16 adapter accommodates low profile x2, x4, x8, x12 or x16 PCI Express cards, eliminating the cost and hassle of upgrading a PCIe card or pcle x1 slot PCIe boards can fit into slots designed for their lane configuration or higher Plugging a x4 PCIe into a x16 slot is acceptable

pcle x16 slot MOS; Supports DDR4 4733+ ; 1 PCIe x16, 1 PCIe x16, 1 PCIe x1 Reinforced Steel Slot Dual USB Gen2 (Type-A + Type