What is the standard height of PCI-e slots in motherboards?

What is the standard height of PCI-e slots in motherboards? pcie slot height Using PCIe risers, the full height PCI slot configuration supports up to 4 full height and 2 half height PCIe cards The 9-slot PCIe half height configuration pcie4 slot Therefore, some PCIe x16 slots might only have x8 PCIe lanes Usually, this wouldn't be problematic, even if you want to attach a GPU card to it

pcie4 slot slots with maybe half-height cards? Do you know of any such thing? Edit: Maybe something like this: RC27332X16C15 2U 2-slot PCIE X16

pcie slot meaning 1 slot = 20mm, with the width of 110mm  The full-height PCIe adapter slots are located on the left side of the expansion node and are numbered 1 and 2