Will PCIe x1 Sound card work in PCIe x16 slot?

What Is PCIe x16 ? - pcie x1 in x16 slot This PCIe x1 to PCIe x16 Slot Extension adapter provides enhanced compatibility between motherboards and a variety of PCI Express expansion cards, allowing you pcie x32 slot For example, an x1 slot can have only one transfer lane used by the x1 card inserted into the slot; x2, x4, x8, and x16 slots are also available

pcie 4 nvme in pcie 3 slot P35 boards can only allocate x1 or x4 lanes to the second PCI-E slot Your card is definitely in X1 mode, GPU-Z doesn't truncate numbers like