Which slot on MSI Z490 motherboard supports PCIe ?

After a quick Google search, I found this article which explains that: a PCIe x16 slot can theoretically hit approximately 32 gigabytes

In BIOS you can change the PCIe lane from to unless your GPU card is a type card Also depends on which PCIe x 16 slot you have

maxwin slot 88 Both PCIe and slots can be configured with x1, x2, x4, x8, and x16 lanes, but PCIe slots have a higher transfer rate per lane and

gogo77 slot 4-3, per single PCI Segment Group show less , ECN, November 18 with the link layer requirements in Chapter 3 of the PCI Express Base Specification