HBA pcie x8 card on pcie x4

SlimSAS 8i to PCIe x8 Slot Adapter pcie 8x slot PCI Express PCI-E PCIe 8X to 16X Female Slot Adapter Converter Riser Card for Graphics Card, You can get more details about PCI Express PCI-E PCIe 8X to 16X pcie 30 x4 slot A PCIe x8 slot has a physical length of approximately 56mm and has a single notch on the connector, similar to PCIe x1 and x4 slots PCIe x8 devices are

pcie slot height PCIe slot