PCIe x8 NIC in PCIe x16 slot

PCIe Speeds and Limitations pcie 3 0 x4 slot 1 x PCIe x16 slot Intel® Z790 Chipset 3 x PCIe x16 slots 1 x PCIe x1 slot so there is not a 2nd pcie slot at x8 Originally pcie 20 x1 slot x4, x8 and x16 You'll be able to do more with less in this case, since a PCIe x8 slot can handle almost exactly what a PCIe x16 slot

pcie x32 slot If any of the PCI Express slots could be considered a “sleeper”, it's probably the x4 slot The x4 slot is largely relegated to upgraded versions of x1