Are my PCIe x1 slots PCIe or ?

PCIe slot There are total 5 PCIe slots :2 PCIe x1, PCIe x4, PCIe x8, PCIe x16 Among them we recommend PCIe x4 for 10 GB

But PCIe is a serial data transfer protocol Legacy PCI and PCIe slots topologies Fig 2 Legacy PCI and PCIe slots topologies PCIe x1 signal description is

pcie 1 slot Intel Z790 LGA 1700 ATX motherboard with PCIe® , three slots, 14 1 x PCIe x1 slot * Please check the PCIe bifurcation table on the

pcie 30 x4 slot It's got a PCIe x16 slot and a PCIe x1 slot There are three PCIe slots, all of which are cooled by simple heatsinks, and