PCI-E Splitter 1x4 PCI Riser Card,PCIe 1 to 4 PCI-Express 16X Slots

You can use dmidecode with slot option something like this: $ sudo dmidecode -t slot grep -A 4 -B 5 Available Handle 0x0900, DMI type 9,

Mini-tower computer with 1 PCI, 3 PCIe slots Up to 2 COM Ports and 12th Gen Alder Lake, supports Windows 10 and 11

pcie slot configuration gen1 gen2 gen3 For example, a single-lane PCIe card can be Yes, you can definitely install a PCI-Ex1 card in to any PCIEx1, x4, or x16 slot

pci 4 in pci 3 slot For example, my NIC is a ConnectX3 single port which is a x4 card That's not going to fit in a 1x slot