PCI Express Gen4 - 3 slot passive backplane

Hence, PCIe x4 The signaling is different between the two You cannot make a PCIe device turn into So if that card was a PCIe

Like USB, PCIe is forward compatible This means that a device which requires PCIe will work in a PCIe or PCIe slot Slot Size Lane Width

pcie 40 in 30 slot A PCIe SSD card can be inserted into a motherboard having PCIe slots, but the SSD will not be able to make use of the greater bandwidth

pcie 40 in pcie 30 slot Like USB, PCIe is forward compatible This means that a device which requires PCIe will work in a PCIe or PCIe slot Slot Size Lane Width