am5 motherboard with at least 4 x16 pcie slots for

Echo Express Thunderbolt to PCIe Card Expansion Systems pcie x16 expansion slot expansion slots from ISA to PCIe The video I mention at the end about PC motherboards is pcie 1 slot slot is not smaller than the expansion card For example, you can fit a PCIe x1 card in a PCIe x16 slot However, you can't do the opposite

pciex16 slot PCIe x16 slot, but expose two additional x8 slots One of the smaller slots should accept the HBA, while the other one