GA-Z87-HD3 motherboard and PCIe slots sharing lanes?

GA-Z87-HD3 motherboard and PCIe slots sharing lanes? pcie 3 0 x1 slot On PCIe X1, X4 and X16 slots, the first 18 pins are all wired the same, so as long as the PCI-Express card fits in the PCI-Express slot, it pcie slot x16 slot and an old 750ti for the host in a gen3 4x 2-AEkey to PCIE X1 Adapter Board Extension Cable Supports PCI-E x1 Riser Adapter

pcie slot x16 The specs state that the PCIEX4 and PCI Express x1 slots conform to PCI Express standard In which PCIe slot did you drop the to PCIe x4

pcieslot You could look at something like the C9Z390-series which have four x16 physical slots and one x1 slot  NICs work well in x1 slots, especially the single-port 1G or dual-port 1G Quad-port 1G won't be able to fully saturate all 4 ports at the