What can I do with a PCI-E x1 slot? ard

The slot 4 is the PCIe X1 slot; it is the correct slot where you can fix the PCIe X1 cards

No that's not possible The physical interface of that wireless card is PCIe x1 and the lenght of

pcle x16 slot What is a PCI Express x1 Slot? The smallest of the PCI Express slots, your standard PCI Express x1 slot is essentially your starting point for most expansion

pcle slot The PCIe x1 slot supports all types of wireless network cards, including the latest Wi-Fi 6 protocol However, a PCIe x1 slot can only support 1